CN113555886A - Load data-based three-phase imbalance control method, system and equipment - Google Patents
Load data-based three-phase imbalance control method, system and equipment Download PDFInfo
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Abstract
The application discloses a three-phase unbalance control method, a three-phase unbalance control system and three-phase unbalance control equipment based on load data, wherein firstly, each branch line and load of a transformer area are named to obtain a label of each branch line and load, the grade of each branch line and load in the transformer area can be obtained through the label, then, the average line loss quantity and the average load consumption quantity of each branch line are calculated, then, an action priority matrix of a commutation switch in each branch line is generated according to the average line loss quantity, the average load consumption quantity and the label of each branch line and load, when the three-phase unbalance degree at an outlet of a transformer of the transformer area is detected, a specific commutation switch is actuated according to the action priority matrix, so that the commutation switch is switched on or switched off, the balance degree of each item is adjusted, and the adjustment process is continuously circulated until the three-phase is balanced; thereby solved prior art and reduced the technical problem that the effect is limited and inefficiency.
Description
Technical Field
The application relates to the technical field of electric power, in particular to a three-phase unbalance control method, system and equipment based on load data.
Background
In the whole power network, energy loss is generated in any link of transmission, distribution and transmission. The low-voltage distribution network directly connected with the users is dense due to wide coverage, multiple distribution equipment and complex lines, and the loss of the low-voltage distribution network accounts for more than 60% of the total loss of the power grid. Three-phase load in a power distribution network is asymmetric, so that unbalanced current can be generated in a system, and further, the transformer and a line in an unbalanced operation state generate more active loss, the output capacity of the transformer is reduced, the power supply quality is reduced, and other adverse effects are caused. How to technically reduce the loss and reduce the carbon emission level of the distribution network is always a key concern and research difficulty in the power industry.
At present, three main technical schemes are provided for solving the problem of three-phase imbalance. The first is to adopt an interphase capacitance compensation mode, but the technical scheme has a large problem in the popularization process, and is not used much at present. The second is to utilize SVG improved generation device, though this technical scheme installation is implemented simply, can solve the unbalanced three-phase problem of transformer body, nevertheless can not effectively solve whole platform district circuit and load side unbalanced three-phase problem, and self loss is great, the noise is very big. The scheme is a new-generation technical scheme, and needs to add a low-voltage load online automatic commutation control terminal in a distribution transformer area, configure a proper amount of low-voltage load online automatic commutation devices, use the part of load as an adjusting load, and analyze the three-phase load condition of the transformer area and the three-phase unbalance degree by the control terminal, give an optimal three-phase load transfer adjusting strategy, and then control the corresponding commutation devices to carry out interphase load transfer according to the adjusting strategy, so that the three-phase load of the transformer area reaches a new balance state; however, in the technical scheme, only the unbalance degree of the distribution transformer outgoing line side is considered, the loss of the cable line of the distribution substation area is not considered, the loss reduction effect is not obvious under the condition that some branch lines are long, the power utilization condition of each user in the substation area needs to be measured and analyzed on site, the measured data points are limited, only the data at a certain time point can be measured, and the workload is large, and the efficiency is low.
Disclosure of Invention
The application provides a three-phase imbalance control method, system and device based on load data, and aims to solve the technical problems of limited loss reduction effect and low efficiency in the prior art.
In view of the above, a first aspect of the present application provides a method for controlling three-phase imbalance based on load data, the method including:
s1, naming each branch and each load of the distribution area according to the line topology of the target distribution area to obtain the labels of all branch lines and loads;
s2, acquiring historical power utilization information of all loads in the target distribution area, and calculating the average line loss and the average load power consumption of each branch line in the target distribution area within a preset time period according to the historical power utilization information;
s3, generating an action priority matrix of the commutation switch according to the average line loss, the load average 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 of the target transformer area meets 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 action signals to the commutation switches with the priority order of N, calculating the three-phase unbalance degree and executing the 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 commutation switch with the priority order of N-1, making N be 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 commutation switch with the priority order of N, sending an action signal to the commutation switch with the priority order of N-1, making N be N-2, and returning to the step S4.
Optionally, step S1 specifically includes:
and calculating the number of nodes between each branch line or load and the transformer of the target distribution area based on the nodes of the line topology of the target distribution area, dividing each branch line and load into a plurality of grades according to the number of the nodes, and naming each branch line and each load of the distribution area according to the grades to obtain the labels of all the branch lines and the loads.
Optionally, the preset priority generation rule is:
sequencing the priorities of the phase change switches in each branch line from top to bottom in sequence according to the number of nodes between each branch line and the terminal load from small to large to obtain the action priority of the phase change switches in each level;
when the grades of the branch lines where the phase change switches are located are the same, sequencing the priority levels of the phase change switches in the branch lines from high to low in sequence according to the average line loss of the branch lines from high to low to obtain the action priority levels of the phase change switches in the same grade;
when a plurality of phase change switches exist in the same branch line, the priorities of the phase change switches are sequentially ranked from top to bottom according to the average load power consumption of the phase change switches from high to low, and the action priorities of the phase change switches in the same branch line are obtained.
Optionally, the calculating, according to the historical power consumption information, an average line loss of each branch line in the target station area in a preset time period specifically includes:
dividing the preset time period into a plurality of line loss amount acquisition points, and 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 utilization information.
Optionally, after step S6, the method further includes: and when the three-phase unbalance degree does not accord with the preset standard interval after the preset action time is exceeded, sending an alarm signal to operation and maintenance personnel.
A second aspect of the present application provides a three-phase imbalance control system based on load data, the system comprising:
the naming module is used for naming each branch and each load of the distribution area according to the line topology of the target distribution area to obtain the labels of all the branches and the loads;
the calculation module is used for acquiring historical power consumption information of all loads in the target distribution area and calculating the average line loss and the average load power consumption of each branch line in the target distribution area within a preset time period according to the historical power consumption information;
the generating module is used for generating an action priority matrix of the commutation switch according to the average line loss, the average load power consumption and the label based on a preset priority generating rule;
the detection module is used for judging whether the three-phase unbalance degree at the outlet of the transformer of the target platform area meets a preset standard interval, if so, no action signal is sent, and otherwise, the first action module is triggered;
the first action module is used for calculating the three-phase unbalance and triggering the second action module after sending action signals to the commutation switches with the 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;
and the second action module is used for sending an action signal to the commutation switch with the priority sequence of N-1 and triggering the detection module after N-2 is set as the three-phase unbalance degree does not accord with the preset standard interval and becomes smaller, and for sending an action signal to the commutation switch with the priority sequence of N-1 and triggering the detection module after N-2 is set as 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 number of nodes between each branch line or load and the transformer of the target distribution area based on the nodes of the line topology of the target distribution area, dividing each branch line and load into a plurality of grades according to the number of the nodes, and naming each branch line and each load of the distribution area according to the grades to obtain the labels of all the branch lines and the loads.
Optionally, the calculation module is specifically configured to:
acquiring historical power utilization information of all loads in a target platform area;
dividing the preset time period into a plurality of line loss amount acquisition points, and 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 utilization information;
and acquiring 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 operation and maintenance personnel when the three-phase unbalance degree still does not accord with a preset standard interval after the preset action time is exceeded.
A third aspect of the present application provides a three-phase imbalance control apparatus based on load data, 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.
According to the technical scheme, the method has the following advantages:
the application provides a three-phase unbalance control method based on load data, firstly, naming each branch line and load of a transformer area to obtain a label of each branch line and load, obtaining the grade of the branch line and the load in the transformer area through the label, then calculating the average line loss quantity and the average load consumption quantity of each branch line, then generating an action priority matrix of a commutation switch in the branch line according to the average line loss quantity, the average load consumption quantity and the label of each branch line and load, and when detecting the three-phase unbalance degree at an outlet of a transformer of the transformer area, acting a specific commutation switch according to the action priority matrix to enable the commutation switch to be closed or opened, thereby adjusting the balance degree of each item and continuously cycling the adjustment process until the three-phase is balanced; according to the method, the historical electricity utilization information of the stock user on the metering system is fully utilized, timely adjustment is carried out according to the electricity utilization rule of the user, the loss reduction effect is obvious, and the control method is simple and efficient to implement; thereby solved prior art and reduced the technical problem that the effect is limited and inefficiency.
Drawings
Fig. 1 is a schematic flowchart of an embodiment of a three-phase imbalance control method based on load data according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of a platform branch line and a load naming scheme provided in an embodiment of the present application;
fig. 3 is a schematic structural diagram of a three-phase imbalance control system based on load data according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1 and 2, an embodiment of the present application provides a method for controlling three-phase imbalance based on load data, including:
step 101, naming each branch and each load of the platform area according to the line topology of the target platform area to obtain the labels of all branches and loads.
It should be noted that, in this embodiment, each branch and load of a station area are named according to the line topology of the station area in the metering information system. The related naming rule is as follows, a branch line or a load directly connected with a distribution transformer in a transformer area is a primary branch line or a load, and is named according to branch lines or loads 1,2. The branch line or load of the first-stage branch line is a second-stage branch line or load, and is named as branch line or load 1_1,1_2, N1_ N2; by analogy, the resulting branch and load labels are shown in fig. 2.
And 102, acquiring historical power utilization information of all loads in the target distribution area, and calculating the average line loss and the average load power consumption of each branch line in the target distribution area in a preset time period according to the historical power utilization information.
In the present embodiment, 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 amount, and the like. The load average power consumption can be directly obtained through historical power consumption information, and the method for calculating 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, and 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 power utilization information.
For example: and calculating the line loss of each branch line of the transformer area according to the information of each load of the transformer area, wherein 8 line loss amount acquisition points are calculated every day, the line loss amount acquisition points are calculated every month according to 30 days, and each branch line has 240 line loss amount acquisition points every month, so that the monthly average line loss amount of the branch line is calculated.
And 103, generating an action priority matrix of the commutation switch according to the average line loss, the load average power consumption and the label based on a preset priority generation rule.
It should be noted that the preset priority generation rule of this embodiment is:
sequencing the priorities of the phase change switches in each branch line from top to bottom in sequence according to the number of nodes between each branch line and the terminal load from small to large to obtain the action priority of the phase change switches in each level;
when the grades of the branch lines where the phase change switches are located are the same, sequencing the priority levels of the phase change switches in the branch lines from high to low in sequence according to the average line loss of the branch lines from high to low to obtain the action priority levels of the phase change switches in the same grade;
when a plurality of phase change switches exist in the same branch line, the priority levels of the phase change switches are sequentially ranked from top to bottom according to the average load power consumption of the phase change switches from high to low, and the action priority levels of the phase change switches in the same branch line are obtained.
Can be simply understood as:
the closer to a branch line of the tail end load, the higher the priority of the phase change switch on the branch line;
the larger the average line loss of the branch lines at the same level, the higher the priority of the action of the phase change switch on the branch line;
the more than one phase change switch is installed on the same branch line, and the higher the monthly average electricity consumption of the connected load is, the higher the priority is.
The action priority matrix can be updated once a month according to the average line loss quantity of the branch lines and the average power consumption quantity of the load in a month on the distribution area.
And 104, judging whether the three-phase unbalance degree at the outlet of the transformer of the target transformer area meets a preset standard interval, if so, not sending an action signal, and otherwise, executing a step 105.
In a specific embodiment, as shown in fig. 2, a person skilled in the art may detect whether the three-phase imbalance at the outlet of the transformer of the target platform region meets a preset standard interval by setting a control terminal.
And 105, based on the action priority matrix, after sending action signals to the commutation switches with the priority order of N, calculating the three-phase unbalance degree and executing step 106, wherein N is the highest priority in the priority order, and N is a positive integer.
Can be simply understood as: the action information is sent to the commutation switches from high to low in priority, step 105 sends action signals to the commutation switch with the highest priority, and then the three-phase unbalance is calculated, and step 106 is executed.
And step 106, when the three-phase unbalance degree does not accord with the preset standard interval and becomes smaller, sending an action signal to the commutation switch with the priority order of N-1 and making N be N-2, returning to the step 104, when the three-phase unbalance degree does not accord with the preset standard interval and becomes larger, resetting the commutation switch with the priority order of N, sending an action signal to the commutation switch with the priority order of N-1 and making N be N-2, and returning to the step 104.
It can be understood that the control terminal detects the three-phase unbalance degree at the outlet of the transformer in the transformer area after the phase change switch is operated, and the control terminal does not need to operate again if the three-phase unbalance degree meets the requirement; if the three-phase unbalance degree at the outlet of the transformer is smaller but still does not meet the requirement, an action signal is sent to a commutation switch with the priority next to the commutation switch; if the unbalance degree of the three phases at the outlet of the transformer is increased, the phase change switch after action is reset, and then the action signal is sent to the phase change switch with the priority next to the phase change switch. The 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 in a transformer area to obtain a label of each branch line and load, obtaining the grade of the branch line and the load in the transformer area through the label, then calculating the average line loss quantity and the average load consumption quantity of each branch line, then generating an action priority matrix of a commutation switch in the branch line according to the average line loss quantity, the average load consumption quantity and the label of each branch line and load, and when detecting the three-phase unbalance degree at an outlet of a transformer in the transformer area, acting a specific commutation switch according to the action priority matrix to enable the commutation switch to be switched on or switched off, thereby adjusting the balance degree of each item and continuously cycling the adjustment process until the three phases are balanced; according to the method, the historical electricity utilization information of the stock user on the metering system is fully utilized, timely adjustment is carried out according to the electricity utilization rule of the user, the loss reduction effect is obvious, and the control method is simple and efficient to implement; thereby solved prior art and reduced the technical problem that the effect is limited and inefficiency.
Further, in a specific embodiment, the present application names each branch and each load of a station area according to a line topology of a target station area to obtain labels of all branch lines and loads, specifically:
and calculating the number of nodes between each branch line or load and the transformer of the target distribution area based on the nodes of the line topology of the target distribution area, dividing each branch line and load into a plurality of grades according to the number of the nodes, and naming each branch line and each load of the distribution area according to the grades to obtain the labels of all the branch lines and the loads.
As shown in fig. 2, each branch and load of a station area are named according to the line topology of the station area in the metering information system. The related naming rule is as follows, a branch line or a load directly connected with a distribution transformer in a transformer area is a primary branch line or a load, and is named according to branch lines or loads 1,2. The branch line or load of the first-stage branch line is a second-stage branch line or load, and is named as branch line or load 1_1,1_2, N1_ N2; and so on.
Further, in a specific embodiment, step 106 is followed by: and when the preset action time is exceeded and the three-phase unbalance degree still does not accord with the preset standard interval, sending an alarm signal to operation and maintenance personnel.
In order to prevent the occurrence of adjustment dead cycle in the control process, after a period of action time, if the unbalance degree of the three phases still does not accord with the preset standard interval, an alarm signal is sent to operation and maintenance personnel to inform the operation and maintenance personnel to intervene in maintenance.
As shown in fig. 2, in order to better explain the phase change switch action in the console area using the priority matrix to achieve the effect of three-phase imbalance management, the following is an example:
generally, a distribution area appears side and is provided with an area control terminal, phase change switches are arranged in front of a key charge meter in the distribution area, one area is composed of one terminal and N phase change switches, and the specific number is generally determined according to the capacity and the unbalance degree of transformers in the area.
The control terminal detects the three-phase unbalance degree at the outlet of the transformer area after the phase change switch is operated, and if the three-phase unbalance degree meets the requirement, the control terminal does not need to operate again; 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 commutation switch with the priority next to the commutation switch; if the unbalance degree of the three phases at the outlet of the transformer is increased, the phase change switch of the action is reset and sends an action signal to the phase change switch with the priority next to the phase change switch. And repeating the steps until the three-phase unbalance degree meets the normal standard.
The above is an embodiment of a three-phase imbalance control method based on load data provided by the present application, and the following is an embodiment of a three-phase imbalance control system based on load data provided by the present application.
Referring to fig. 3, the present application provides a three-phase imbalance control system based on load data, including:
the naming module 201 is configured to name each branch and each load of the target distribution area according to the line topology of the target distribution area, so as to obtain tags of all branches and loads.
The calculating module 202 is configured to obtain historical power consumption information of all loads in the target distribution area, and calculate an average line loss amount and an average load power consumption amount of each branch line in the target distribution area within a preset time period according to the historical power consumption information.
And the generating module 203 is configured to generate an action priority matrix of the commutation switch according to the average line loss, the average load power consumption and the label based on a preset priority generation rule.
And the detection module 204 is used for judging whether the three-phase unbalance degree at the outlet of the transformer of the target platform area meets a preset standard interval, if so, no action signal is sent, and otherwise, the first action module is triggered.
The first action module 205 is configured to calculate a three-phase imbalance and trigger the second action module after sending an action signal to the commutation switch with the priority order of N based on the action priority matrix, where N is the highest priority in the priority order, and N is a positive integer.
And a second action module 206, configured to send an action signal to the commutation switch with priority N-1 and trigger the detection module after making N equal to N-2 when the three-phase imbalance degree does not meet the preset standard interval and becomes smaller, and send an action signal to the commutation switch with priority N-1 and trigger the detection module after making N equal to N-2 after resetting the commutation switch with priority N when the three-phase imbalance degree does not meet the preset standard interval and becomes larger.
The embodiment provides a three-phase unbalance control system based on load data, which includes that firstly, each branch line and load of a transformer area are named to obtain a label of each branch line and load, the grade of each branch line and load in the transformer area can be obtained through the label, then, the average line loss quantity and the average load consumption quantity of each branch line are calculated, then, an action priority matrix of a commutation switch in each branch line is generated according to the average line loss quantity, the average load consumption quantity and the label of each branch line and load, when three-phase unbalance degree at an outlet of a transformer of the transformer area is detected, a specific commutation switch is operated according to the action priority matrix, so that the commutation switch is switched on or switched off, the balance degree of each item is adjusted, and the adjustment process is continuously circulated until the three phases are balanced; according to the method, the historical electricity utilization information of the stock user on the metering system is fully utilized, timely adjustment is carried out according to the electricity utilization rule of the user, the loss reduction effect is obvious, and the control method is simple and efficient to implement; thereby solved prior art and reduced the technical problem that the effect is limited and inefficiency.
Further, the present application also provides a three-phase imbalance control apparatus based on load data, wherein 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 used for the three-phase unbalance control method based on the load data according to the method embodiment instructed by the program code.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the system and the device described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The terms "first," "second," "third," "fourth," and the like in the description of the present application and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. 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 the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" for describing an association relationship of associated objects, indicating that there may be three relationships, e.g., "a and/or B" may indicate: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural items. 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 the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed 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 can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above embodiments are only used for illustrating the technical solutions 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (10)
1. A three-phase unbalance control method based on load data is characterized by comprising the following steps:
s1, naming each branch and each load of the distribution area according to the line topology of the target distribution area to obtain the labels of all branch lines and loads;
s2, acquiring historical power utilization information of all loads in the target distribution area, and calculating the average line loss and the average load power consumption of each branch line in the target distribution area within a preset time period according to the historical power utilization information;
s3, generating an action priority matrix of the commutation switch according to the average line loss, the load average 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 of the target transformer area meets 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 action signals to the commutation switches with the priority order of N, calculating the three-phase unbalance degree and executing the 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 commutation switch with the priority order of N-1, making N be 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 commutation switch with the priority order of N, sending an action signal to the commutation switch with the priority order of N-1, making N be N-2, and returning to the step S4.
2. The load data-based three-phase imbalance control method according to claim 1, wherein the step S1 specifically includes:
and calculating the number of nodes between each branch line or load and the transformer of the target distribution area based on the nodes of the line topology of the target distribution area, dividing each branch line and load into a plurality of grades according to the number of the nodes, and naming each branch line and each load of the distribution area according to the grades to obtain the labels of all the branch lines and the loads.
3. The load data-based three-phase imbalance control method according to claim 2, wherein the preset priority generation rule is:
sequencing the priorities of the phase change switches in each branch line from top to bottom in sequence according to the number of nodes between each branch line and the terminal load from small to large to obtain the action priority of the phase change switches in each level;
when the grades of the branch lines where the phase change switches are located are the same, sequencing the priority levels of the phase change switches in the branch lines from high to low in sequence according to the average line loss of the branch lines from high to low to obtain the action priority levels of the phase change switches in the same grade;
when a plurality of phase change switches exist in the same branch line, the priorities of the phase change switches are sequentially ranked from top to bottom according to the average load power consumption of the phase change switches from high to low, and the action priorities of the phase change switches in the same branch line are obtained.
4. The method for controlling three-phase imbalance based on load data according to claim 1, wherein the calculating an average line loss of each branch line in the target station area in a preset time period according to the historical power utilization information specifically includes:
dividing the preset time period into a plurality of line loss amount acquisition points, and 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 utilization information.
5. The load data-based three-phase imbalance control method according to claim 1, wherein after the step S6, the method further comprises: and when the three-phase unbalance degree does not accord with the preset standard interval after the preset action time is exceeded, sending an alarm signal to operation and maintenance personnel.
6. 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 distribution area according to the line topology of the target distribution area to obtain the labels of all the branches and the loads;
the calculation module is used for acquiring historical power consumption information of all loads in the target distribution area and calculating the average line loss and the average load power consumption of each branch line in the target distribution area within a preset time period according to the historical power consumption information;
the generating module is used for generating an action priority matrix of the commutation switch according to the average line loss, the average load power consumption and the label based on a preset priority generating rule;
the detection module is used for judging whether the three-phase unbalance degree at the outlet of the transformer of the target platform area meets a preset standard interval, if so, no action signal is sent, and otherwise, the first action module is triggered;
the first action module is used for calculating the three-phase unbalance and triggering the second action module after sending action signals to the commutation switches with the 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;
and the second action module is used for sending an action signal to the commutation switch with the priority sequence of N-1 and triggering the detection module after N-2 is set as the three-phase unbalance degree does not accord with the preset standard interval and becomes smaller, and for sending an action signal to the commutation switch with the priority sequence of N-1 and triggering the detection module after N-2 is set as the three-phase unbalance degree does not accord with the preset standard interval and becomes larger.
7. The load data-based three-phase imbalance control system of claim 6, wherein the naming module is specifically configured to:
and calculating the number of nodes between each branch line or load and the transformer of the target distribution area based on the nodes of the line topology of the target distribution area, dividing each branch line and load into a plurality of grades according to the number of the nodes, and naming each branch line and each load of the distribution area according to the grades to obtain the labels of all the branch lines and the loads.
8. The load data-based three-phase imbalance control system of claim 6, wherein the calculation module is specifically configured to:
acquiring historical power utilization information of all loads in a target platform area;
dividing the preset time period into a plurality of line loss amount acquisition points, and 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 utilization information;
and acquiring the average power consumption of the load according to the historical power consumption information.
9. The load data based three-phase imbalance control system of claim 6, further comprising: an alarm module;
and the alarm module is used for sending an alarm signal to operation and maintenance personnel when the three-phase unbalance degree still does not accord with a preset standard interval after the preset action time is exceeded.
10. A three-phase imbalance control apparatus based on load data, 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 1-5 according to instructions in the program code.
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