CN113555886B - A three-phase unbalance control method, system and equipment based on load data - Google Patents
A three-phase unbalance control method, system and equipment based on load data Download PDFInfo
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- CN113555886B CN113555886B CN202110875782.3A CN202110875782A CN113555886B CN 113555886 B CN113555886 B CN 113555886B CN 202110875782 A CN202110875782 A CN 202110875782A CN 113555886 B CN113555886 B CN 113555886B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
本申请公开了一种基于负荷数据的三相不平衡控制方法、系统及设备，首先对台区的各支线和负载进行命名得到各支线和负载的标签，通过该标签可以获得支线和负载在台区中的等级，接着计算各支线的平均线损量和负载平均用电量，然后根据平均线损量、负载平均用电量以及各支线和负载的标签生成支线中换相开关的动作优先级矩阵，当检测到台区变压器的出口处三相不平衡度时，根据动作优先级矩阵对具体换相开关进行动作，使得换相开关闭合或断开，从而调整各项的平衡度，不断循环调整过程直至三相平衡；从而解决了现有技术降损效果有限且效率低的技术问题。
This application discloses a three-phase unbalance control method, system and equipment based on load data. First, each branch line and load in the station area are named to obtain the label of each branch line and load. Through the label, the branch line and load in the station can be obtained. level in the area, then calculate the average line loss of each branch line and the average power consumption of the load, and then generate the action priority of the commutation switch in the branch line based on the average line loss, the average power consumption of the load, and the labels of each branch line and load Matrix, when the three-phase unbalance at the outlet of the transformer in the Taiwan area is detected, the specific commutation switch is acted upon according to the action priority matrix, so that the commutation switch is closed or opened, thereby adjusting the balance of each item, and the cycle continues The adjustment process is carried out until the three phases are balanced; thereby solving the technical problems of limited loss reduction effect and low efficiency of the existing technology.
Description
Technical Field
The application relates to the technical field of electric power, in particular to a three-phase unbalanced control method, system and equipment based on load data.
Background
In the whole power network, any link of transmitting, transporting, distributing and delivering can generate energy loss. The low-voltage distribution network directly connected with the user has wide coverage range, more distribution equipment and complicated and dense lines, and the loss of the low-voltage distribution network accounts for more than 60% of the total loss of the power network. The three-phase load in the power distribution network is asymmetric, so that unbalanced current is generated in the system, and further, the transformer and the circuit in an unbalanced running state generate more active loss, the output capacity of the transformer is reduced, the power supply quality is reduced and other adverse effects. How to reduce the technical loss and the self carbon emission level of the distribution network layer is always a major concern and research difficulty in the power industry.
At present, three main technical schemes for treating the three-phase unbalance problem are available. The first is to adopt the mode of inter-phase capacitance compensation, but because the technical scheme has larger problems in the popularization process, the current use is not more. The second is to use the SVG improved device, although the installation and implementation of the technical scheme are simple, the problem of three-phase unbalance of the transformer body can be solved, but the problem of three-phase unbalance of the whole transformer area line and the load side can not be effectively solved, and the self loss is large and the noise is large. The rapid phase change switch scheme is a new generation technical scheme, the scheme needs to add a low-voltage load on-line automatic phase change control terminal in a distribution area, and a proper amount of low-voltage load on-line automatic phase change device is configured, the partial load is used as an adjusting load, the control terminal collects the three-phase load condition of the area and analyzes three-phase imbalance degree, an optimal three-phase load transfer adjusting strategy is given, and then the corresponding phase change device is controlled to carry out phase change load transfer according to the adjusting strategy, so that the three-phase load of the area reaches a new balance state; however, the technical scheme only considers the unbalance degree of the distribution transformer line side, does not consider the loss on the cable line of the distribution transformer area, has no obvious loss reducing effect on the condition that some branch lines are long, and needs to measure and analyze the electricity consumption condition of each user of the transformer area on site, so that the data points to be measured are limited, and only the data at a certain time point can be measured, thereby leading to large workload and low efficiency.
Disclosure of Invention
The application provides a three-phase imbalance control method, system and equipment based on load data, which are used for solving the technical problems of limited loss reduction effect and low efficiency in the prior art.
In view of this, the present application provides, in a first aspect, a three-phase imbalance control method based on load data, the method including:
s1, naming each branch and each load of a platform area according to the line topology of a target platform area to obtain labels of all branch lines and loads;
s2, acquiring historical electricity consumption information of all loads in the target platform area, and calculating average line loss and average load electricity consumption of each branch line in the target platform area in a preset time period according to the historical electricity consumption information;
s3, generating an action priority matrix of a phase change switch according to the average line loss, the average load power consumption and the label based on a preset priority generation rule;
s4, judging whether the three-phase unbalance degree at the outlet of the transformer in the target station area accords with a preset standard interval, if so, not sending an action signal, otherwise, executing the step S5;
s5, based on the action priority matrix, after sending an action signal to a phase change switch with a priority order of N, calculating three-phase unbalance degree and executing a step S6, wherein N is the highest priority in the priority order, and N is a positive integer;
and S6, when the three-phase unbalance degree does not accord with the preset standard interval and becomes smaller, sending an action signal to the phase change switch with the priority order of N-1, enabling N=N-2, and returning to the step S4, and when the three-phase unbalance degree does not accord with the preset standard interval and becomes larger, resetting the phase change switch with the priority order of N, sending the action signal to the phase change switch with the priority order of N-1, enabling N=N-2, and returning to the step S4.
Optionally, step S1 specifically includes:
and calculating the node number between each branch line or load and the transformer of the target station area based on the nodes of the line topology of the target station area, dividing each branch line and load into a plurality of grades according to the node number, naming each branch line and each load of the station area according to the grades, and obtaining labels of all branch lines and loads.
Optionally, the preset priority generation rule is:
according to the number of nodes between each branch line and the end load from small to large, the priority of the phase change switch in each branch line is orderly sequenced from high to low, and the action priority of the phase change switch in each grade is obtained;
when the branch line grades where the phase change switches are positioned are the same, according to the average line loss quantity of each branch line from large to small, the priority of the phase change switches in each branch line is orderly sequenced from high to low, and the action priority of the phase change switches in the same grade is obtained;
when a plurality of phase change switches exist in the same branch line, the priority of each phase change switch is orderly sequenced from high to low according to the average power consumption of the load of each phase change switch, and the action priority of each phase change switch in the same branch line is obtained.
Optionally, the calculating the average line loss of each branch line in the target platform area in a preset time period according to the historical electricity consumption specifically includes:
dividing the preset time period into a plurality of line loss amount acquisition points, dividing the sum of the line loss amounts of the line loss amount acquisition points by the number of the line loss amount acquisition points to obtain the average line loss amount, wherein the line loss amount is calculated according to the historical electricity consumption information.
Optionally, after step S6, the method further includes: and when the preset action time is exceeded, the three-phase unbalance degree still does not accord with a preset standard interval, and an alarm signal is sent to operation and maintenance personnel.
A second aspect of the present application provides a load data based three-phase imbalance control system, the system comprising:
the naming module is used for naming each branch and each load of the platform area according to the line topology of the target platform area to obtain labels of all branch lines and loads;
the calculation module is used for acquiring historical electricity consumption information of all loads in the target platform area and calculating average line loss and average load electricity consumption of each branch line in the target platform area in a preset time period according to the historical electricity consumption information;
the generation module is used for generating an action priority matrix of the phase change switch according to the average line loss, the average load power consumption and the label based on a preset priority generation rule;
the detection module is used for judging whether the three-phase unbalance degree at the outlet of the transformer in the target station area accords with a preset standard interval, if so, not sending an action signal, otherwise, executing a triggering first action module;
the first action module is used for calculating three-phase unbalance and triggering the second action module after sending an action signal to a phase change switch with a priority order of N based on the action priority matrix, wherein N is the highest priority in the priority order, and N is a positive integer;
the second action module is used for sending an action signal to the phase change switch with the priority order of N-1 and triggering the detection module after N=N-2 when the three-phase unbalance degree does not accord with the preset standard interval and becomes smaller, and sending an action signal to the phase change switch with the priority order of N-1 and triggering the detection module after N=N-2 when the three-phase unbalance degree does not accord with the preset standard interval and becomes larger.
Optionally, the naming module is specifically configured to:
and calculating the node number between each branch line or load and the transformer of the target station area based on the nodes of the line topology of the target station area, dividing each branch line and load into a plurality of grades according to the node number, naming each branch line and each load of the station area according to the grades, and obtaining labels of all branch lines and loads.
Optionally, the computing module is specifically configured to:
acquiring historical electricity consumption information of all loads in a target platform area;
dividing the preset time period into a plurality of line loss amount acquisition points, dividing the sum of the line loss amounts of the line loss amount acquisition points by the number of the line loss amount acquisition points to obtain the average line loss amount, wherein the line loss amount is calculated according to the historical electricity consumption information;
and obtaining the average power consumption of the load according to the historical power consumption information.
Optionally, the method further comprises: an alarm module;
and the alarm module is used for sending an alarm signal to an operation and maintenance person when the three-phase unbalance degree does not meet a preset standard interval after the preset action time is exceeded.
A third aspect of the present application provides a load data-based three-phase imbalance control apparatus, the apparatus comprising a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to execute the load data-based three-phase imbalance control method according to the first aspect described above according to instructions in the program code.
From the above technical scheme, the application has the following advantages:
the application provides a three-phase unbalance control method based on load data, which comprises the steps of firstly naming each branch line and load of a transformer area to obtain labels of each branch line and load, obtaining grades of the branch lines and the load in the transformer area through the labels, calculating average line loss and average load consumption of each branch line, generating an action priority matrix of a phase change switch in the branch line according to the average line loss, the average load consumption and the labels of each branch line and the load, and when the three-phase unbalance degree at the outlet of the transformer area is detected, acting on the specific phase change switch according to the action priority matrix, so that the phase change switch is closed or opened, thereby adjusting the balance degree of each branch line, and continuously and circularly adjusting the process until the three phases are balanced; the method and the system make full use of the historical electricity consumption of the stock users on the metering system, timely adjust the electricity consumption according to the electricity consumption rule of the users, have remarkable loss reduction effect, and are simple and efficient to implement; thereby solving the technical problems of limited loss reducing effect and low efficiency in the prior art.
Drawings
Fig. 1 is a schematic flow chart of an embodiment of a three-phase imbalance control method based on load data provided in an embodiment of the present application;
fig. 2 is a schematic diagram of a branch line of a transformer area and naming of a load according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a three-phase unbalanced control system based on load data according to an embodiment of the present application.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will clearly and completely describe the technical solution in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
Referring to fig. 1 and 2, a three-phase imbalance control method based on load data provided in an embodiment of the present application includes:
and step 101, naming each branch and each load of the platform area according to the line topology of the target platform area to obtain labels of all branch lines and loads.
It should be noted that, in this embodiment, each branch and load of a zone are named according to the line topology of the zone in the metering information system. The naming rules involved are as follows, the branch line or load directly connected with the distribution transformer of the district is a first-stage branch line or load, and the branch line or load is named as 1,2. The branch line or load re-tapped by the first branch line is a second branch line or load, named as branch line or load 1_1, 1_2. By analogy, the resulting spur and load tag are shown in fig. 2.
Step 102, acquiring historical electricity consumption information of all loads in the target platform area, and calculating average line loss and average load electricity consumption of each branch line in the target platform area in a preset time period according to the historical electricity consumption information.
It should be noted that, in this embodiment, the historical electricity consumption information of all loads in the target area is read from the metering information system, and the historical electricity consumption information relates to current, voltage, electricity consumption and the like. The average power consumption of the load can be directly obtained through historical power consumption information, and the calculation method of the average line loss can refer to the following specific embodiment.
Dividing a preset time period into a plurality of line loss amount acquisition points, dividing the sum of the line loss amounts of the line loss amount acquisition points by the number of the line loss amount acquisition points to obtain an average line loss amount, wherein the line loss amount is calculated according to historical electricity consumption information.
For example: and calculating the line loss of each branch line of the platform region according to the information of each load of the platform region, calculating 8 line loss quantity acquisition points per day, calculating according to 30 days in one month, and 240 line loss quantity acquisition points per month of each branch line, thereby calculating the average line loss quantity of the branch line in one month.
And 103, generating an action priority matrix of the phase change switch according to the average line loss, the average load power consumption and the labels based on a preset priority generation rule.
It should be noted that, the preset priority generation rule in this embodiment is:
according to the number of nodes between each branch line and the end load from small to large, the priority of the phase change switch in each branch line is orderly sequenced from high to low, and the action priority of the phase change switch in each grade is obtained;
when the branch line grades where the phase change switches are positioned are the same, the priority of the phase change switches in each branch line is orderly sequenced from high to low according to the average line loss of each branch line, so as to obtain the action priority of the phase change switches in the same grade;
when a plurality of phase change switches exist in the same branch line, the priority of each phase change switch is orderly sequenced from high to low according to the average power consumption of the load of each phase change switch, and the action priority of each phase change switch in the same branch line is obtained.
Can be simply understood as:
the closer to the branch of the end load, the higher the priority of the phase change switch on the branch;
the larger the average line loss of the branch line month of the same grade is, the higher the priority of the phase change switch action on the branch line is;
more than one phase change switch is arranged on the same branch line, and the higher the average power consumption of the load month connected with the phase change switch is, the higher the priority of the phase change switch is.
The action priority matrix can be updated once a month according to the average line loss and the average power consumption of the load of the branch line of one month on the platform region.
Step 104, judging whether the three-phase unbalance degree at the outlet of the transformer in the target station area accords with a preset standard interval, if so, not sending an action signal, otherwise, executing step 105.
In the specific embodiment, as shown in fig. 2, a person skilled in the art can detect whether the three-phase imbalance at the outlet of the transformer of the target transformer area meets a preset standard interval by setting a control terminal.
Step 105, based on the action priority matrix, after sending an action signal to the phase change switch with the priority order of N, calculating the three-phase imbalance and executing step 106, where N is the highest priority in the priority order, and N is a positive integer.
Can be simply understood as: the step 105 is executed by transmitting the operation information from the high-to-low priority phase change switch, transmitting the operation signal to the highest priority phase change switch, and calculating the three-phase imbalance.
Step 106, when the three-phase imbalance degree does not meet the preset standard interval and becomes smaller, sending an action signal to the phase change switch with the priority order of N-1 and making n=n-2, and returning to step 104, when the three-phase imbalance degree does not meet the preset standard interval and becomes larger, resetting the phase change switch with the priority order of N, sending an action signal to the phase change switch with the priority order of N-1 and making n=n-2, and returning to step 104.
It can be understood that the control terminal detects the three-phase unbalance degree at the transformer outlet of the transformer area after the phase change switch acts, and if the three-phase unbalance degree meets the requirement, the control terminal does not need to act any more; if the three-phase unbalance degree at the outlet of the transformer is smaller but still does not meet the requirements, sending an action signal to a phase change switch with priority level being lower than that of the transformer; if the three-phase unbalance degree at the outlet of the transformer is increased, the phase change switch after the action is reset, and then an action signal is sent to the phase change switch with the priority level being lower than that of the phase change switch. Steps 104-106 are continuously cycled until the three phases are balanced.
The embodiment provides a three-phase unbalance control method based on load data, which comprises the steps of firstly naming each branch line and load of a transformer area to obtain labels of each branch line and load, obtaining grades of the branch lines and the load in the transformer area through the labels, calculating average line loss and average load power consumption of each branch line, generating an action priority matrix of a phase change switch in the branch line according to the average line loss, the average load power consumption and the labels of each branch line and the load, and when the three-phase unbalance of an outlet of a transformer in the transformer area is detected, actuating the specific phase change switch according to the action priority matrix to enable the phase change switch to be closed or opened, thereby adjusting the balance degree of each branch line, and continuously cycling the adjustment process until the three phases are balanced; the method and the system make full use of the historical electricity consumption of the stock users on the metering system, timely adjust the electricity consumption according to the electricity consumption rule of the users, have remarkable loss reduction effect, and are simple and efficient to implement; thereby solving the technical problems of limited loss reducing effect and low efficiency in the prior art.
Further, in a specific embodiment, the present application names each branch and each load of a target station according to a line topology of the target station, so as to obtain labels of all branches and loads, which are specifically:
and calculating the node number between each branch line or load and the transformer of the target station area based on the nodes of the line topology of the target station area, dividing each branch line and load into a plurality of grades according to the node number, naming each branch line and each load of the station area according to the grades, and obtaining the labels of all branch lines and loads.
As shown in fig. 2, each branch and load of a zone is named according to the line topology of the zone in the metering information system. The naming rules involved are as follows, the branch line or load directly connected with the distribution transformer of the district is a first-stage branch line or load, and the branch line or load is named as 1,2. The branch line or load re-tapped by the first branch line is a second branch line or load, named as branch line or load 1_1, 1_2. And so on.
Further, in a specific embodiment, step 106 further includes: and when the preset action time is exceeded, the three-phase unbalance degree still does not accord with the preset standard interval, and an alarm signal is sent to operation and maintenance personnel.
In order to prevent the occurrence of an adjustment dead cycle in the control process, therefore, after a period of action time, if the three-phase unbalance degree does not meet a preset standard interval, an alarm signal is sent to an operation and maintenance personnel to inform the operation and maintenance personnel of intervening maintenance.
As shown in fig. 2, to better illustrate the phase change switching actions in the console area using the priority matrix, the effect of three-phase imbalance management is achieved, as follows:
the distribution transformer area is characterized in that an area control terminal is installed at the side where a distribution transformer area appears, a phase change switch is installed in front of an important load ammeter of the distribution transformer area, one distribution transformer area consists of one terminal and N phase change switches, and the specific number is generally determined according to the capacity and unbalance degree of the transformer of the distribution transformer area.
The control terminal detects the three-phase unbalance degree at the outlet of the transformer in the transformer area after the phase change switch acts, and if the three-phase unbalance degree meets the requirement, the control terminal does not need to act any more; if the three unbalance degrees at the outlet of the transformer are smaller but still do not meet the requirements, sending an action signal to a phase change switch with priority level being lower than that of the transformer; if the three-phase unbalance degree at the outlet of the transformer is increased, resetting the phase change switch of the action and sending an action signal to the phase change switch with priority level being lower than that of the phase change switch. Repeating the steps until the three-phase unbalance degree meets the normal standard.
The above is an embodiment of a load data-based three-phase imbalance control method provided by the present application, and the following is an embodiment of a load data-based three-phase imbalance control system provided by the present application.
Referring to fig. 3, a three-phase unbalanced control system based on load data provided in the present application includes:
and the naming module 201 is configured to name each branch and each load of the target area according to the line topology of the target area, and obtain labels of all branch lines and loads.
The calculation module 202 is configured to obtain historical power consumption information of all loads in the target platform area, and calculate an average line loss and an average power consumption of the loads of each branch line in the target platform area within a preset time period according to the historical power consumption information.
The generating module 203 is configured to generate an action priority matrix of the phase change switch according to the average line loss, the average load power consumption, and the tag based on a preset priority generating rule.
The detection module 204 is configured to determine whether the three-phase imbalance at the outlet of the transformer in the target transformer area meets a preset standard interval, if yes, not send an action signal, otherwise, execute triggering of the first action module.
The first action module 205 is configured to calculate three-phase imbalance after sending an action signal to a phase change switch with a priority order of N based on an action priority matrix, where N is the highest priority in the priority order, and N is a positive integer, and trigger the second action module.
The second action module 206 is configured to send an action signal to the phase change switch with the priority order of N-1 and trigger the detection module after n=n-2 when the three-phase imbalance does not meet the preset standard interval and becomes smaller, and send an action signal to the phase change switch with the priority order of N-1 and trigger the detection module after n=n-2 when the three-phase imbalance does not meet the preset standard interval and becomes larger.
The embodiment provides a three-phase unbalanced control system based on load data, firstly, each branch line and load of a transformer area are named to obtain labels of each branch line and load, the grades of the branch lines and the load in the transformer area can be obtained through the labels, then, the average line loss and the average load consumption of each branch line are calculated, then, an action priority matrix of a phase change switch in the branch line is generated according to the average line loss, the average load consumption and the labels of each branch line and the load, when the three-phase unbalance degree at the outlet of the transformer area is detected, the specific phase change switch is acted according to the action priority matrix, so that the phase change switch is closed or opened, the balance degree of each branch line is adjusted, and the adjustment process is continuously circulated until the three phases are balanced; the method and the system make full use of the historical electricity consumption of the stock users on the metering system, timely adjust the electricity consumption according to the electricity consumption rule of the users, have remarkable loss reduction effect, and are simple and efficient to implement; thereby solving the technical problems of limited loss reducing effect and low efficiency in the prior art.
Further, the present application also provides a three-phase imbalance control apparatus based on load data, which is characterized in that the apparatus includes a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to implement the load data-based three-phase imbalance control method according to the method embodiment according to the instructions in the program code.
It will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the system and the apparatus described above may refer to the corresponding process in the foregoing method embodiment, which is not repeated herein.
The terms "first," "second," "third," "fourth," and the like in the description of the present application and in the above-described figures, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be capable of operation in sequences other than those illustrated or described herein, for example. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be understood that in this application, "at least one" means one or more, and "a plurality" means two or more. "and/or" for describing the association relationship of the association object, the representation may have three relationships, for example, "a and/or B" may represent: only a, only B and both a and B are present, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b or c may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: u disk, mobile hard disk, read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk, etc.
The above embodiments are merely for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (7)
1. A three-phase imbalance control method based on load data, comprising:
s1, naming each branch and each load of a platform area according to the line topology of a target platform area to obtain labels of all branch lines and loads;
s2, acquiring historical electricity consumption information of all loads in the target platform area, and calculating average line loss and average load electricity consumption of each branch line in the target platform area in a preset time period according to the historical electricity consumption information;
s3, generating an action priority matrix of a phase change switch according to the average line loss, the average load power consumption and the label based on a preset priority generation rule;
s4, judging whether the three-phase unbalance degree at the outlet of the transformer in the target station area accords with a preset standard interval, if so, not sending an action signal, otherwise, executing the step S5;
s5, based on the action priority matrix, after sending an action signal to a phase change switch with a priority order of N, calculating three-phase unbalance degree and executing a step S6, wherein N is the highest priority in the priority order, and N is a positive integer;
s6, when the three-phase unbalance degree does not accord with the preset standard interval and becomes smaller, sending an action signal to the phase change switch with the priority order of N-1, enabling N=N-2, and returning to the step S4, when the three-phase unbalance degree does not accord with the preset standard interval and becomes larger, resetting the phase change switch with the priority order of N, sending the action signal to the phase change switch with the priority order of N-1, enabling N=N-2, and returning to the step S4;
the step S1 specifically includes:
calculating the number of nodes between each branch line or load and a transformer of a target platform area based on nodes of the line topology of the target platform area, dividing each branch line and load into a plurality of grades according to the number of nodes, naming each branch line and each load of the platform area according to the grades, and obtaining labels of all branch lines and loads;
the preset priority generation rule is as follows:
according to the number of nodes between each branch line and the end load from less to more, the priority of the phase change switch in each branch line is orderly sequenced from high to low, and the action priority of the phase change switch in each grade is obtained;
when the branch line grades where the phase change switches are positioned are the same, sequencing the priority of the phase change switches in each branch line from high to low according to the average line loss of each branch line from high to low, so as to obtain the action priority of the phase change switches in the same grade;
when a plurality of phase change switches exist in the same branch line, the priority of each phase change switch is orderly sequenced from high to low according to the average power consumption of the load of each phase change switch, and the action priority of each phase change switch in the same branch line is obtained.
2. The method for controlling three-phase imbalance based on load data according to claim 1, wherein calculating the average line loss of each branch line in the target station area within a preset time period according to the historical power consumption information specifically comprises:
dividing the preset time period into a plurality of line loss amount acquisition points, dividing the sum of the line loss amounts of the line loss amount acquisition points by the number of the line loss amount acquisition points to obtain the average line loss amount, wherein the line loss amount is calculated according to the historical electricity consumption information.
3. The load data-based three-phase imbalance control method according to claim 1, further comprising, after step S6: and when the preset action time is exceeded, the three-phase unbalance degree still does not accord with a preset standard interval, and an alarm signal is sent to operation and maintenance personnel.
4. A three-phase imbalance control system based on load data, comprising:
the naming module is used for naming each branch and each load of the platform area according to the line topology of the target platform area to obtain labels of all branch lines and loads;
the calculation module is used for acquiring historical electricity consumption information of all loads in the target platform area and calculating average line loss and average load electricity consumption of each branch line in the target platform area in a preset time period according to the historical electricity consumption information;
the generation module is used for generating an action priority matrix of the phase change switch according to the average line loss, the average load power consumption and the label based on a preset priority generation rule;
the detection module is used for judging whether the three-phase unbalance degree at the outlet of the transformer in the target station area accords with a preset standard interval, if so, not sending an action signal, otherwise, executing a triggering first action module;
the first action module is used for calculating three-phase unbalance and triggering the second action module after sending an action signal to a phase change switch with a priority order of N based on the action priority matrix, wherein N is the highest priority in the priority order, and N is a positive integer;
the second action module is used for sending an action signal to the phase change switch with the priority order of N-1 and triggering the detection module after N=N-2 when the three-phase unbalance degree does not accord with the preset standard interval and becomes smaller, and sending the action signal to the phase change switch with the priority order of N-1 and triggering the detection module after N=N-2 when the three-phase unbalance degree does not accord with the preset standard interval and becomes larger;
wherein, the naming module is specifically configured to:
calculating the number of nodes between each branch line or load and a transformer of a target platform area based on nodes of the line topology of the target platform area, dividing each branch line and load into a plurality of grades according to the number of nodes, naming each branch line and each load of the platform area according to the grades, and obtaining labels of all branch lines and loads;
the preset priority generation rule is as follows:
according to the number of nodes between each branch line and the end load from less to more, the priority of the phase change switch in each branch line is orderly sequenced from high to low, and the action priority of the phase change switch in each grade is obtained;
when the branch line grades where the phase change switches are positioned are the same, sequencing the priority of the phase change switches in each branch line from high to low according to the average line loss of each branch line from high to low, so as to obtain the action priority of the phase change switches in the same grade;
when a plurality of phase change switches exist in the same branch line, the priority of each phase change switch is orderly sequenced from high to low according to the average power consumption of the load of each phase change switch, and the action priority of each phase change switch in the same branch line is obtained.
5. The load data based three-phase imbalance control system of claim 4, wherein the computing module is specifically configured to:
acquiring historical electricity consumption information of all loads in a target platform area;
dividing the preset time period into a plurality of line loss amount acquisition points, dividing the sum of the line loss amounts of the line loss amount acquisition points by the number of the line loss amount acquisition points to obtain the average line loss amount, wherein the line loss amount is calculated according to the historical electricity consumption information;
and obtaining the average power consumption of the load according to the historical power consumption information.
6. The load data based three-phase imbalance control system of claim 4, further comprising: an alarm module;
and the alarm module is used for sending an alarm signal to an operation and maintenance person when the three-phase unbalance degree does not meet a preset standard interval after the preset action time is exceeded.
7. A load data based three-phase imbalance control apparatus, the apparatus comprising a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to execute the load data-based three-phase imbalance control method of any one of claims 1-3 according to instructions in the program code.
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| CN114552608B (en) * | 2022-04-13 | 2023-10-13 | 南方电网电力科技股份有限公司 | Three-phase imbalance treatment method and related device based on charge and discharge of energy storage system |
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