A method, device and electronic device for implementing batch load control

Abstract

The present invention discloses a method, device and electronic equipment for realizing batch load control, which relates to the field of power grid security control strategies. The key points of its technical solution are as follows: Enter the parameter information of the operable transmission lines in the SCADA system according to the accident load shedding sequence table, and establish the real-time topological relationship of the operable transmission lines in the SCADA system according to the parameter information; wherein, the real-time topological relationship is used to describe the subordinate relationship of switches; when a power grid fault is detected, determine the load gap of the whole network and / or each transmission and transformation section, and the executable load of the whole network and / or each transmission and transformation section according to the SCADA system; according to the load gap and the executable load, and then combine the round information of the accident load shedding sequence table and the real-time topological relationship of the operable transmission lines to generate a control strategy for batch load control; according to the control strategy, realize the batch load control of the whole network and / or each transmission and transformation section.

Description

Technical Field

[0001] The present invention relates to the field of power grid security control strategies, and more specifically, to a method, device, and electronic device for realizing batch load control. Background Art

[0002] In an emergency, the power grid may experience situations such as frequency drop and equipment overlimit. If not responded to quickly, it may lead to the collapse of the power grid. To ensure the safety of the power grid, the power grid dispatching department must issue accident load shedding instructions in a timely manner according to the pre - arranged plans. Among them, batch load control is the last line of defense to ensure the safety of the power grid.

[0003] Existing batch load control means adopt the method of "pre - entering accident pre - arranged plans and executing accident pre - arranged plans during the event", but there are relatively significant drawbacks. First, personnel need to enter the controlled feeder switches into the system one by one according to the pre - arranged plan in advance, and the control plan generated in this process takes a lot of time. Second, after the power grid operation mode changes, maintenance personnel must manually adjust the entered feeder switches according to the power grid operation mode and then modify the control strategy, resulting in poor real - time performance. Finally, the accident pre - arranged plan must be entered into the system in advance. Once an accident occurs without a pre - arranged plan, the system will be unable to perform batch control.

[0004] Therefore, how to achieve fast, accurate, and real - time batch load control of 10kV feeder switches to avoid the indiscriminate disconnection of important, high - risk, and sensitive users in the event of a power grid fault, thereby minimizing the impact of accident load shedding to the greatest extent. Summary of the Invention

[0005] The purpose of the present invention is to provide a method, device, and electronic device for realizing batch load control to solve the problem that the prior art cannot quickly, accurately, and real - time complete the batch load control of 10kV feeder switches.

[0006] In the first aspect of the present application, a method for realizing batch load control is provided. The method includes:

[0007] Enter the parameter information of the operable transmission lines into the SCADA system according to the accident load shedding sequence table, and establish the real - time topological relationship of the operable transmission lines in the SCADA system; wherein, the real - time topological relationship is used to describe the subordinate relationship of switches;

[0008] When it is detected that a power grid fault occurs, determine the load gap of the whole network and / or each sub - station section, and the executable load of the whole network and / or each sub - station section according to the SCADA system;

[0009] Generate a control strategy for batch load control according to the load gap, the executable load, combined with the round information of the accident load shedding sequence table and the real - time topological relationship of the operable transmission lines;

[0010] According to the control strategy, batch control of the load of the entire network and / or each power transmission and transformation section is realized.

[0011] In one implementation, the parameter information includes one or more of the double names of transmission lines, rounds, sorting, load types, affiliated units, and security loads.

[0012] In one implementation, a real-time topological relationship of operable transmission lines is established, specifically:

[0013] Taking any 10kV feeder switch included in the substation in the accident load shedding sequence table as the charge starting point, controlling the charge starting point to migrate on the main transformer, transmission line, and bus until encountering the 220kV side switch or the disconnected switch of the 500kV main transformer, and taking all the power equipment passed by the charge starting point during the migration process as the free pool of any 10kV feeder switch;

[0014] According to the 10kV feeder switch in the free pool, preset the 220kV switch of the 500kV main transformer as the unidirectional main isolation pool, the 220kV line switch of the transmission section as the unidirectional auxiliary isolation pool, and the 220kV side switch of the 220kV main transformer as the unidirectional sub-isolation pool;

[0015] Verify the topological relationship of the 10kV feeder switch. When the verification result of the topological relationship of the 10kV feeder switch is correct, establish the topological relationship between the unidirectional sub-isolation pool and the unidirectional auxiliary isolation pool, the topological relationship between the unidirectional sub-isolation pool and the unidirectional main isolation pool, and the topological relationship between the unidirectional auxiliary isolation pool and the unidirectional main isolation pool.

[0016] In one implementation, verify the topological relationship of the 10kV feeder switch, specifically: when any 10kV feeder switch is only in one unidirectional sub-isolation pool, at least in one unidirectional main isolation pool, or in zero or more unidirectional auxiliary isolation pools, the topological relationship verification of the 10kV feeder switch is correct.

[0017] In one implementation, establishing the topological relationship between the unidirectional sub-isolation pool and the unidirectional auxiliary isolation pool includes:

[0018] If all the feeder switches of any unidirectional sub-isolation pool are in any one or more unidirectional auxiliary isolation pools, then any unidirectional sub-isolation pool is subordinate to any one or more unidirectional auxiliary isolation pools; among them, the unidirectional sub-isolation pool may not belong to any unidirectional auxiliary isolation pool;

[0019] Establish the topological relationship between the unidirectional sub-isolation pool and the unidirectional main isolation pool, including: if all the feeder switches of any unidirectional sub-isolation pool are in any one or more unidirectional main isolation pools, then any unidirectional sub-isolation pool belongs to any one or more unidirectional main isolation pools; among them, the unidirectional sub-isolation pool belongs to at least one unidirectional main isolation pool;

[0020] Establish the topological relationship between the unidirectional auxiliary isolation pool and the unidirectional main isolation pool, including: if all the feeder switches of any unidirectional auxiliary isolation pool are in any one or more unidirectional main isolation pools, then any unidirectional auxiliary isolation pool belongs to any one or more unidirectional main isolation pools; among them, the unidirectional auxiliary isolation pool belongs to at least one unidirectional main isolation pool.

[0021] In one implementation, determine the load gap of the whole network and / or each power transmission and transformation section according to the SCADA system, including:

[0022] Subtract the current actual load of the whole network from the load plan value issued by the superior dispatching to obtain the load gap of the whole network;

[0023] Determine the active power difference of the active power of the 500kV main transformer low-voltage side, the active power of the power transmission section, and the active power of the 220kV main transformer low-voltage side, and subtract the active power difference from the set rated active power to obtain the load gap of each power transmission and transformation section;

[0024] Determine the executable load of the whole network and / or each power transmission and transformation section according to the SCADA system, including: conduct the control verification of the 10kV feeder switches that can be pulled and limited in the SCADA system, and include the loads supplied by the 10kV feeder switches that pass the verification in the executable load.

[0025] In one implementation, the control verification of the 10kV feeder switches that can be pulled and limited in the SCADA system includes: switch position verification, switch power flow verification, basic model verification, protection signal verification, hanging plate verification, pressure plate verification, and communication protocol verification.

[0026] In one implementation, generate the control strategy for load batch control according to the load gap and the executable load, and then combine the round information of the accident power curtailment sequence table, including:

[0027] When in the state of power shortage in the whole network and no power shortage in each power transmission and transformation section, distribute the executable load of the whole network according to the proportion of the actual load value of the round information of the power supply area until the total amount of the distributed load batch control is greater than the load gap of the whole network;

[0028] When the whole network has no power shortage but each power transmission and transformation section has a power shortage, transfer the loads within each power transmission and transformation section to the non-power-shortage areas. If there are still load gaps in each power transmission and transformation section after the load transfer, according to the topology search results of the real-time topology relationship, allocate the executable load amounts of each power transmission and transformation section in proportion to the actual load values of the load round-robin information within the power transmission and transformation section until the total batch control amount of the allocated loads is greater than the load gap amounts of each power transmission and transformation section;

[0029] When the whole network has a power shortage and each power transmission and transformation section has a power shortage, transfer the loads within each power transmission and transformation section to the non-power-shortage areas. If only the state of the whole network having a power shortage is processed after the load transfer, then execute the operation process when the whole network has a power shortage and each power transmission and transformation section has no power shortage; if the whole network still has a power shortage and each power transmission and transformation section still has a power shortage after the load transfer, allocate the executable load amount of the whole network in proportion to the actual load values of the first round of the power supply area. If the whole network still has a power shortage and each power transmission and transformation section still has a power shortage after the first-round load allocation, then execute the operation process when the whole network has a power shortage and each power transmission and transformation section has a power shortage; if the whole network still has a power shortage and each power transmission and transformation section still has a power shortage after the first-round load allocation, then execute the next-round load allocation until the total batch control amount of the loads is greater than the load gap amount.

[0030] In the second aspect of the present application, a device for realizing batch load control is provided. The device includes:

[0031] A topology relationship establishment module, configured to enter the parameter information of the operable transmission lines in the SCADA system according to the accident power limitation sequence table, and establish the real-time topology relationship of the operable transmission lines in the SCADA system according to the parameter information; wherein, the real-time topology relationship is used to describe the subordinate relationship of switches;

[0032] A load parameter determination module, configured to determine the load gap amounts of the whole network and / or each power transmission and transformation section, and the executable load amounts of the whole network and / or each power transmission and transformation section according to the SCADA system when a power grid fault is detected;

[0033] A control strategy generation module, configured to generate a control strategy for batch load control according to the load gap amounts and the executable load amounts, in combination with the round-robin information of the accident power limitation sequence table and the real-time topology relationship of the operable transmission lines;

[0034] A load control module, configured to realize the batch load control of the whole network and / or each power transmission and transformation section according to the control strategy.

[0035] In a third aspect of the present application, an electronic device is provided. The electronic device includes a processor, a memory, and a computer program stored on the memory and executable by the processor. When the computer program is executed by the processor, the steps of a method for implementing load batch control provided in the first aspect of the present application are realized.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] The present invention provides a method for implementing load batch control. It enters the parameter information of operable transmission lines in the SCADA system according to the accident power curtailment sequence table, and establishes the real-time topological relationship of operable transmission lines in the SCADA system based on the parameter information; when a power grid fault is detected, it determines the load gap of the whole network and / or each transmission and transformation section, and the executable load of the whole network and / or each transmission and transformation section according to the SCADA system; according to the load gap and the executable load, combined with the round information of the accident power curtailment sequence table and the real-time topological relationship of operable transmission lines, a control strategy for load batch control is generated. The present invention avoids the indiscriminate cutting off of important, high-risk, and sensitive users in case of a fault, and minimizes the impact of accident power curtailment to the greatest extent. Description of the Drawings

[0038] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, form a part of the present application, and do not limit the embodiments of the present invention. In the drawings:

[0039] Figure 1 It is a schematic flowchart of a method for implementing load batch control provided by an embodiment of the present invention;

[0040] Figure 2 It is a principle block diagram of a device for implementing load batch control provided by an embodiment of the present invention. Detailed Embodiments

[0041] To make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the embodiments and the drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and do not limit the present invention.

[0042] It should be noted that the term "including" or "may include" that can be used in various embodiments of the present application indicates the presence of the claimed functions, operations, or elements, and does not limit the addition of one or more functions, operations, or elements. In addition, as used in various embodiments of the present application, the terms "including", "having", and their cognates are only intended to indicate specific features, numbers, steps, operations, elements, components, or combinations of the foregoing items, and should not be construed as first excluding the existence of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing items or the possibility of adding one or more features, numbers, steps, operations, elements, components, or combinations of the foregoing items.

[0043] In various embodiments of the present application, the expression "or" or "at least one of B or / and C" includes any combination or all combinations of the words listed simultaneously. For example, the expression "B or C" or "at least one of B or / and C" may include B, may include C, or may include both B and C. In the description of the present invention, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0044] Existing load batch control means adopt "pre - entering accident plans in advance and executing accident plans during the event", but there are relatively significant drawbacks. First, personnel need to enter the feeder switches to be controlled into the system one by one according to the plan in advance, and the control plan generated in this process takes a lot of time. Second, after the power grid operation mode changes, maintenance personnel must manually adjust the entered feeder switches according to the power grid operation mode and then modify the control strategy, resulting in poor real - time performance. Finally, the accident plan must be entered into the system in advance. Once an accident occurs without a plan, the system will not be able to perform batch control.

[0045] Therefore, how to achieve fast, accurate, and real - time load batch control of 10kV feeder switches to avoid the indiscriminate cutting off of important, high - risk, and sensitive users in the case of power grid failures, thereby minimizing the impact of accident - related power cuts, is a technical problem that urgently needs to be solved at present.

[0046] Therefore, this embodiment provides a method, device, and electronic device for realizing load batch control, which solves the problem that the related technology cannot quickly, accurately, and real - time perform large - batch load control of 10kV switches, provides a load batch control that can achieve adaptive topology search, strategy self - generation, automatic control, and orderly restoration, improves the accident handling efficiency of the power grid in emergency situations, avoids the indiscriminate cutting off of important, high - risk, and sensitive users in case of failures, and minimizes the impact of accident - related power cuts.

[0047] The method for realizing load batch control provided by the present application will be described in detail below in combination with specific implementation manners. Please refer to Figure 1 , Figure 1A flowchart showing a method for implementing batch load control provided by an embodiment of the present invention is as follows Figure 1 As shown, the method includes:

[0048] S101, input the parameter information of the operable transmission lines in the SCADA system according to the accident load shedding sequence table, and establish the real-time topological relationship of the operable transmission lines in the SCADA system according to the parameter information; wherein, the real-time topological relationship is used to describe the subordinate relationship of switches.

[0049] In this embodiment, the accident load shedding sequence table is a table for sorting the power outages of power users in order to ensure the safe and stable operation of the power grid in the event of a power grid accident or emergency. The accident load shedding sequence table usually contains the following contents: User classification: According to factors such as the electricity consumption nature and importance of users, users are divided into different categories, such as dedicated line users, non-dedicated line users, residential users, public utility users, important and high-risk load users, etc. Load shedding sequence: According to the classification of users and the actual situation of the power grid, determine the load shedding order of different users. Generally speaking, dedicated line users and non-dedicated line users (excluding residential, public utility, important and high-risk loads) will be shed before residential users, public utility users, and important and high-risk load users. However, it should be noted that important and high-risk load users usually take special safeguard measures during power grid accidents to avoid load shedding as much as possible. Load nature: Clearly define the load nature of each user, such as pure industrial lines, industrial and commercial mixed lines, lines without residential areas, lines involving residential customers, etc., so as to more accurately judge the electricity consumption demand and impact of users during load shedding.

[0050] Secondly, the SCADA (Supervisory Control And Data Acquisition) system, that is, the data acquisition and monitoring control system, is a computer-based production process control and scheduling automation system. It can be used in the power system to monitor and control the operation status of the power grid, and also includes functions such as remote meter reading, fault location, and load management to ensure the stability and safety of power supply.

[0051] The parameter information includes one or more of the double names, rounds, sorting, load types, affiliated units, and security loads of the transmission lines.

[0052] In some embodiments, the real-time topological relationship of an operable transmission line is established as follows: Taking any 10kV feeder switch in the substation included in the accident load shedding sequence table as the charge starting point, controlling the charge starting point to migrate on the main transformer, transmission line, and bus until encountering the 220kV side switch of the 500kV main transformer or a disconnected switch, and taking all the power equipment passed by the charge starting point during the migration process as the free pool of any 10kV feeder switch; According to the 10kV feeder switch in the free pool, preset the 220kV switch of the 500kV main transformer as the unidirectional main isolation pool, the 220kV line switch of the transmission section as the unidirectional auxiliary isolation pool, and the 220kV side switch of the 220kV main transformer as the unidirectional sub-isolation pool; Check the topological relationship of the 10kV feeder switch. When the topological relationship check result of the 10kV feeder switch is correct, establish the topological relationship between the unidirectional sub-isolation pool and the unidirectional auxiliary isolation pool, the topological relationship between the unidirectional sub-isolation pool and the unidirectional main isolation pool, and the topological relationship between the unidirectional auxiliary isolation pool and the unidirectional main isolation pool.

[0053] Specifically, taking a certain 10kV feeder switch in the substation included in the load shedding sequence table as the power grid connection point, also known as the charge starting point, the charge can freely migrate on the main transformer, transmission line, and bus until encountering the 220kV side switch of the 500kV main transformer or a disconnected switch, which makes the charge unable to migrate freely. All the equipment passed by this charge is its free pool.

[0054] Set the 220kV switch of the 500kV main transformer as the unidirectional main isolation pool. The charge starting point can only flow in through the 220kV line - the 220kV bus of the 500kV substation, and cannot flow in from the 500kV bus - the 500kV switch of the 500kV main transformer. If there are charges from different free pools, the 220kV power grid in this area is in a closed-loop operation state for the same 500kV main transformer area, and all 10kV switches in the 500kV isolation pool are all 10kV feeder switches contained under this 500kV main transformer.

[0055] Set the 220kV line switch of the transmission section as the unidirectional auxiliary isolation pool. The charge flowing into the isolation pool cannot include the 220kV switch of any 500kV main transformer, and the 10kV switches corresponding to the charge flowing into this unidirectional isolation pool are all 10kV feeder switches within this closed transmission section.

[0056] Set the 220kV side switch of the 220kV main transformer as the unidirectional sub-isolation pool. The charge can only flow in through the 110kV line - the 110kV bus of the 220kV substation, and cannot flow in from the 220kV bus - the 220kV switch of the 220kV main transformer. The switches corresponding to the charges from different free pools within the isolation pool are regarded as all 10kV feeder switches contained under this 220kV main transformer.

[0057] Verify the topological relationship of the 10kV feeder switch. Specifically, when any 10kV feeder switch is only in one unidirectional sub-isolation pool, at least in one unidirectional main isolation pool, or in zero or more unidirectional auxiliary isolation pools, the topological relationship verification of the 10kV feeder switch is correct.

[0058] Establish the topological relationship between the unidirectional sub-isolation pool and the unidirectional auxiliary isolation pool, including: if all the feeder switches of any unidirectional sub-isolation pool are in any one or more unidirectional auxiliary isolation pools, then any unidirectional sub-isolation pool is subordinate to any one or more unidirectional auxiliary isolation pools; among them, the unidirectional sub-isolation pool may not belong to any unidirectional auxiliary isolation pool;

[0059] Establish the topological relationship between the unidirectional sub-isolation pool and the unidirectional main isolation pool, including: if all the feeder switches of any unidirectional sub-isolation pool are in any one or more unidirectional main isolation pools, then any unidirectional sub-isolation pool is subordinate to any one or more unidirectional main isolation pools; among them, the unidirectional sub-isolation pool belongs to at least one unidirectional main isolation pool;

[0060] Establish the topological relationship between the unidirectional auxiliary isolation pool and the unidirectional main isolation pool, including: if all the feeder switches of any unidirectional auxiliary isolation pool are in any one or more unidirectional main isolation pools, then any unidirectional auxiliary isolation pool is subordinate to any one or more unidirectional main isolation pools; among them, the unidirectional auxiliary isolation pool belongs to at least one unidirectional main isolation pool.

[0061] Specifically, take the establishment of the real-time topology process of the 10kV Gaojie Line 1 as an example:

[0062] The first step is to enter the ledger information. The dual name is the 924 switch of the 10kV Gaojie Line 1 at the 110kV Gaoqing Substation. The round is the first round, the sorting is the 4th, the load type is type I (pure industry), the affiliated unit is the Chongzhou Power Supply Branch of Chengdu Power Supply Company, and the security load is 0.

[0063] Step 2: Establish the topological relationship of the unidirectional sub-isolation pool. The 10kV Gaojie Line 1 serves as the charge starting point. The charge migrates upward in the real-time system to the 10kV II bus of the 110kV Gaoqing Substation. Since the 10kV sectional switch 912 is open, the charge cannot pass through the 10kV sectional switch 912 to the 10kV I bus and can only continue to migrate to the No. 2 main transformer of the 110kV Gaoqing Substation and the 110kV II bus of the 110kV Gaoqing Substation. Similarly, since the 110kV sectional switch 123 is open, the charge cannot cross from the 110kV II bus to the 110kV III bus and can only continue to migrate to the 110kV Longqing Line and reach the 110kV II bus of the 220kV Longxing Substation. At this time, the 110kV bus coupler 112 switch of the 220kV Longxing Substation is open, and the charge will continue to migrate to the No. 2 main transformer of the 220kV Longxing Substation. The 202 switch of the No. 2 main transformer of the Longxing Substation is the unidirectional sub-isolation pool to which the 10kV Gaojie Line 1 belongs. If the 110kV bus coupler 112 switch of the 220kV Longxing Substation is in the closed position at this time, the charge can migrate to the No. 1 and No. 2 main transformers of Longxing. Then, the combination of the 201 switch of the No. 1 main transformer and the 202 switch of the No. 2 main transformer of the Longxing Substation forms the unidirectional sub-isolation pool to which the 10kV Gaojie Line 1 belongs.

[0064] Step 3: Establish the topological relationship of the unidirectional main isolation pool. After the charge of the 10kV Gaojie Line 1 reaches the unidirectional sub-isolation pool of the Longxing Substation, it cannot cross the open 220kV Xingdu Line through the 220kV I and II buses of the Longxing Substation and can only reach the 220kV Shuxing 1st and 2nd Lines and the Linxing 1st and 2nd Lines. Then, through the paths of the 220kV Shuxing 1st and 2nd Lines - the 220kV bus of the Shuzhou Substation and the 220kV Linxing 1st and 2nd Lines - the Sulin 1st and 2nd Lines - the Shusu 1st and 2nd Lines - the 220kV bus of the Shuzhou Substation, it stops at the 201 and 202 switches of the No. 1 and No. 2 main transformers of the Shuzhou Substation. This charge belongs to the unidirectional main isolation pool of the main transformers of the 500kV Shuzhou Substation. This charge will also reach the 201 and 202 switches of the No. 1 and No. 2 main transformers of the Yudi Substation through the operating 220kV Shujia Double Circuit and Yujia Double Circuit via the 220kV bus of Shuzhou. Therefore, this charge also belongs to the unidirectional main isolation pool of the main transformers of the 500kV Yudi Substation at the same time.

[0065] Step 4: Establish the topological relationship of the unidirectional auxiliary isolation pool. During the period when the 10kV Gaojie Line 1 migrates from the 10kV voltage level to the 220kV switch of the main transformer of the 500kV Shuzhou Substation, it passes through the 220kV Shuxing 1st and 2nd Lines, the Linxing 1st and 2nd Lines, the Sulin 1st and 2nd Lines, and the Shusu 1st and 2nd Lines respectively. Since there is a preset transmission section for the 220kV Shusu 1st and 2nd Lines + the Shuxing 1st and 2nd Lines, this charge also belongs to the unidirectional auxiliary isolation pool of the 220kV Shusu 1st and 2nd Lines + the Shuxing 1st and 2nd Lines.

[0066] Step 5: Verify the topological relationship: The 10kV Gaojie Line 1 belongs to 1 unidirectional sub-isolation pool, 2 unidirectional main isolation pools, and 1 unidirectional auxiliary isolation pool, meeting the requirements.

[0067] Step 6: Establish the topological relationship between isolation pools. The unidirectional sub-isolation pool of the 220kV Longxing main transformer belonging to the 10kV Gaojie Line 1 should simultaneously belong to the unidirectional main isolation pools of the 500kV Shuzhou main transformer and the Yudi main transformer, and belong to the single-phase auxiliary isolation pool of the 220kV Shusu Lines 1&2 + Shuxing Lines 1&2 section; the single-phase auxiliary isolation pool of the 220kV Shusu Lines 1&2 + Shuxing Lines 1&2 section belongs to the unidirectional main isolation pools of the 500kV Shuzhou main transformer and the Yudi main transformer.

[0068] S102, when a power grid fault is detected, determine the load gap of the entire network and / or each power transmission and transformation section, and the executable load of the entire network and / or each power transmission and transformation section according to the SCADA system.

[0069] In this embodiment, the difference between the current actual load of the entire network and the load plan value issued by the superior dispatching is calculated to obtain the load gap of the entire network;

[0070] Determine the active power difference of the outgoing active power of the 500kV main transformer, the active power of the transmission section, and the outgoing active power of the 220kV main transformer, and calculate the difference between the active power difference and the set rated active power to obtain the load gap of each power transmission and transformation section;

[0071] Determine the executable load of the entire network and / or each power transmission and transformation section according to the SCADA system, including: conduct control verification on the 10kV feeder switches that can be pulled and limited in the SCADA system, and include the loads supplied by the 10kV feeder switches that pass the verification in the executable load.

[0072] Among them, conducting control verification on the 10kV feeder switches that can be pulled and limited in the SCADA system includes: switch position verification, switch power flow verification, basic model verification, protection signal verification, hanging plate verification, pressure plate verification, and communication protocol verification.

[0073] Specifically, for switch position verification, the current remote signal status of the controllable switch must be "closed". For switch power flow verification, the remote measurement quality code of the controllable switch is "normal", the current i >= 10A and the active power p >= 0.15MW. For basic model verification, the control point number of the controllable switch is consistent with the data point number in the remote control definition table. For protection signal verification: the first-class and second-class protection signals of the controllable switch cannot be in the initiated state. The first-class protection signals include switch accident total, protection action, reclosing action signals, etc.; the second-class protection signals include switch SF6 low pressure lockout, switch spring not energized, switch control circuit open, etc. For hanging plate verification, if the first-class and second-class signals in the light board of the controllable switch are hung with light boards such as "out of service", "maintenance", "do not close", etc., the verification fails. For pressure plate verification: the pressure plate of the controllable switch should be put into the remote position. For communication protocol verification, the set parameters of the controllable switch select the controllable communication protocol. When the default setting is 1, the IEC104 communication protocol is controllable, and other protocols are not controllable.

[0074] S103. Generate a control strategy for batch load control based on the load gap and the executable load, combined with the round information in the accident power curtailment sequence table and the real-time topological relationship of the operable transmission lines.

[0075] In this embodiment, it should be noted that to avoid insufficient load control due to subsequent remote control failure of the switches in the strategy library, the stability control system generates a control strategy according to 120% of the issued load. Secondly, there are three control preferences for the control strategy, including the least number of switch operations, the least impact on users, and the highest operational safety benefit. Among them, the control strategy with the least number of switch operations is adopted by default. Among them, the least number of switch operations: sort the current loads of the controllable switches from large to small. The least impact on users: sort according to the number of users on the lines supplied by the controllable switches from small to large. The highest operational safety benefit: automatically search for the controllable switches and their current loads included in the overweight equipment according to the real-time topology of the power grid, sort the loads of the controllable switches of the same overweight equipment from high to low until the pre-evaluated equipment load rate drops below 95%. The priority between different overweight equipment is sorted according to the equipment load rate, and the switches belonging to the equipment with a higher load rate are sorted more forward.

[0076] Secondly, the round information is explained as follows. The round information includes the first round, the second round, the third round, the fourth round, and the fifth round. For example, the first round generally refers to power curtailment for pure industrial loads, and the second round generally refers to power curtailment for industrial and commercial loads.

[0077] The generated control strategy includes the following three situations:

[0078] S1031. When the whole network is short of power and each power transmission and transformation section is not short of power, allocate the executable load of the whole network according to the proportion of the actual load value of the load in the round information of the power supply area until the total batch load control amount allocated is greater than the load gap of the whole network.

[0079] Specifically, if the whole network is short of power and each power transmission and transformation section is not short, allocate the executable amount of the whole network according to the proportion of the actual load value of the current first-round load in each district and county. If the first-round load is fully allocated and still cannot meet the load gap of the whole network, allocate the actual load value of the current second-round load in each district and county according to the proportion. If the first- and second-round loads are fully allocated and still cannot meet the load gap of the whole network, allocate the actual load value of the third-round load, and so on, until the fifth-round load, until the total batch load control amount allocated is greater than the load gap of the whole network.

[0080] S1032. When the whole network has no power shortage but each transmission and transformation section has a power shortage, transfer the loads within each transmission and transformation section to the areas without power shortage. If there are still load gaps in each transmission and transformation section after the load transfer, according to the topology search results of the real-time topology relationship, allocate the executable load amounts of each transmission and transformation section in proportion to the actual load values of the load in the round information within the transmission and transformation section until the total batch control amount of the allocated loads is greater than the load gap amounts of each transmission and transformation section.

[0081] Specifically, when the whole network has no power shortage and each transmission and transformation section has a power shortage, first transfer the loads in the power-shortage local section to the areas without power shortage. When there is still a load gap in the local section after the transfer, allocate the first-round loads within the transmission and transformation section according to the topology search results of the real-time topology relationship. If the local load gap cannot be met after all the first-round loads are allocated, allocate the second-round loads, and so on, until the total batch control amount of all the allocated loads is greater than the local section load gap amount.

[0082] S1033. When the whole network has a power shortage and each transmission and transformation section has a power shortage, transfer the loads within each transmission and transformation section to the areas without power shortage. If only the state of the whole network having a power shortage is to be handled after the load transfer, then execute the operation process when the whole network has a power shortage and each transmission and transformation section has no power shortage; if the state of the whole network still having a power shortage and each transmission and transformation section still having a power shortage remains after the load transfer, allocate the executable load amounts of the whole network in proportion to the actual load values of the first-round loads in the power supply areas. If the state of the whole network still having a power shortage and each transmission and transformation section still having a power shortage remains after the first-round load allocation, then execute the operation process when the whole network has a power shortage and each transmission and transformation section has a power shortage; if the state of the whole network still having a power shortage and each transmission and transformation section still having a power shortage remains after the first-round load allocation, then execute the next-round load allocation until the total batch control amount of the loads is greater than the load gap amount.

[0083] Specifically, when there is a power shortage across the entire network or in a local section, the load within the power - short local section should be preferentially transferred to areas without power shortage. After the transfer, if there is only a power shortage across the entire network, repeat S1031. After the transfer, if there is still a power shortage across the entire network and in the local section, the power shortage problem across the entire network should be addressed first. The first - round load across the entire network should be distributed proportionally according to the actual values of the current first - round loads in each district or county. After execution, if there is no power shortage across the entire network but there is a power shortage in the local section, execute S1032. If, after all the first - round loads are distributed, there is still a power shortage across the entire network and in each power transmission and transformation section, then in the power - short local section, a second - round load distribution should be carried out according to the power - shortage load ratio. If, until the second - round load distribution is completed, there is still a power shortage across the entire network and in the local section, then in the power - short local section, a third - round load distribution should be carried out according to the power - shortage load ratio. If, after the third - round load distribution is completed, there is still a power shortage across the entire network and in each power transmission and transformation section, then the second - round and third - round loads of the non - power - short areas should be distributed. If the second - round and third - round loads of the non - power - short areas are also distributed, and there is still a power shortage across the entire network and in each power transmission and transformation section, then the fourth - round and fifth - round loads of the power - short areas should be distributed. If the fourth - round and fifth - round loads of the power - short areas are also distributed, and there is still a power shortage across the entire network and in each power transmission and transformation section, then the fourth - round and fifth - round loads of the non - power - short areas should be distributed until the total batch control amount of all distributed loads is greater than the load gap amount.

[0084] Specifically, taking the example of a power shortage in the 500kV Shuzhou main transformer section and no power shortage across the entire network, and taking the control strategy with the fewest switch operations as an example, it is described as follows:

[0085] First step, search all unidirectional sub - isolation pools in the power - short area. Transfer the loads under the 500kV Shuzhou main transformer to the 500kV Guangdu and Xingmeng areas. After the load transfer, assuming there is still a 50,000 - kilowatt load gap in the 500kV Shuzhou main transformer section, output all unidirectional sub - isolation pools under the unidirectional main isolation pool of the 500kV Shuzhou main transformer according to the real - time topological relationship. The unidirectional sub - isolation pool contains the 10kV feeders under itself.

[0086] Second step, sort the 10kV feeders. Sort all 10kV feeders in the unidirectional sub - isolation pool in the order of the first, second, third, fourth, and fifth rounds. Among the same rounds, they are distributed according to the load ratio of each district or county in this round, and within the district or county, they are sorted from large to small according to the load. The Shuzhou main transformer includes the loads of Chongzhou, Dayi, Pujiang, Qionglai, and Dujiangyan. Among them, the load of Chongzhou accounts for 44% in the first round. At this time, the load of the 10kV Gaojie No.1 line reaches 0.42 million kilowatts, so it ranks fifth in the first round of Chongzhou.

[0087] Step 3: Form the control sequence. Since there is a load gap of 50,000 kW, the control sequence is formed according to 120% of it, that is, 60,000 kW. Since the first-round load in the 500 kV Shuzhou unidirectional main isolation pool is currently 370,000 kW, which is greater than 60,000 kW and sufficient for distribution, Chongzhou needs to distribute 60,000 × 44% = 26,400 kW of the first-round load. The 1st to 5th 10 kV lines in the first round of Chongzhou are incorporated into the control strategy. Since the 10 kV Gaojie No. 1 line is in the 5th position in the first round, it is also incorporated.

[0088] Step 4: Implement control. During the control process, after the system operates to the 4th position in the first round of Chongzhou, the controlled load has met the requirement of 50,000 kW. Therefore, the 10 kV Gaojie No. 1 line is only incorporated into the control strategy but not actually operated in this round of control.

[0089] S104. According to the control strategy, implement batch control of the load of the entire network and / or each transmission and transformation section.

[0090] In this embodiment, the process of implementing batch control of the load of the entire network and / or each transmission and transformation section is as follows:

[0091] S1041: The operator sends to the guardian to enter the 10 kV switch load control program. The system provides two modes: single-step execution and continuous control. If single-step execution is selected, the operator needs to confirm each load control switch. By default, continuous control is selected, and the system automatically and continuously completes the control operations of all load control switches without manual intervention during the process.

[0092] S1042: Before the switch remote control preset, the system conducts a protection signal verification again. The load control switch is not allowed to send out primary and secondary protection signals in the initiating state. The primary protection signals include switch accident total, protection action, reclosing action signals, etc.; the secondary protection signals include switch SF6 low gas pressure lockout, switch spring not energized, switch control circuit open, protection device abnormal.

[0093] S1043: During operation, sequential operations are carried out in the order of the first round, the second round, the third round, the fourth round, and the fifth round. Switches in the same round are operated simultaneously in the parallel control mode.

[0094] S1044: During the operation of the load control switch, the system will monitor the remote signaling and remote measurement information of the load control switch in real time to judge whether the switch is controlled in place. The waiting time for switch position and remote measurement verification can be set, with a default of 45 seconds.

[0095] S1045: After the switch remote control fails, the load control device automatically continues the operation with the standby switch.

[0096] S1046: After completing the load batch operation, an operation record is formed in the first area of the dispatching control system, recording the power flow before all switch operations, the power flow of state estimation, the final power flow after actual operations are completed, the operation (remote control) time and actual displacement time of the switch, the load quantity and the number of lines of all intelligent load batch controls.

[0097] S1047: Synchronize the control load quantity information to the AVC and AGC systems, and let them execute the voltage regulation and frequency regulation strategies.

[0098] Please refer to Figure 2 , Figure 2 , which is the principle block diagram of a device for realizing load batch control provided by an embodiment of the present invention. As Figure 2 shown, the device includes:

[0099] A topology relationship establishment module 210, configured to enter the parameter information of the operable transmission lines in the SCADA system according to the accident power curtailment sequence table, and establish a real-time topology relationship of the operable transmission lines in the SCADA system according to the parameter information; wherein, the real-time topology relationship is used to describe the subordinate relationship of switches;

[0100] A load parameter determination module 220, configured to determine the load gap quantity of the entire network and / or each transmission and transformation section, and the executable load quantity of the entire network and / or each transmission and transformation section according to the SCADA system when detecting that a power grid fault occurs;

[0101] A control strategy generation module 230, configured to generate a control strategy for load batch control according to the load gap quantity and the executable load quantity, combined with the round information of the accident power curtailment sequence table and the real-time topology relationship of the operable transmission lines;

[0102] A load control module 240, configured to realize load batch control of the entire network and / or each transmission and transformation section according to the control strategy.

[0103] An embodiment of the present invention also provides an electronic device, which includes a processor, a memory, a communication interface, and at least one communication bus for connecting the processor, the memory, and the communication interface. The memory includes but is not limited to a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (PROM), or a portable read-only memory (CD-ROM), and the memory is used for relevant instructions and data.

[0104] The communication interface is used to receive and send data. The processor can be one or more CPUs. When the processor is a single CPU, the CPU can be a single-core CPU or a multi-core CPU. The processor in the electronic device is used to read one or more programs stored in the memory and perform the following operations: enter the parameter information of the operable transmission lines in the SCADA system according to the accident power rationing sequence table, and establish the real-time topological relationship of the operable transmission lines in the SCADA system according to the parameter information; wherein, the real-time topological relationship is used to describe the subordinate relationship of switches; when a power grid fault is detected, determine the load gap amount of the whole network and / or each power transmission and transformation section, and the executable load amount of the whole network and / or each power transmission and transformation section according to the SCADA system; according to the load gap amount and the executable load amount, and in combination with the round information of the accident power rationing sequence table and the real-time topological relationship of the operable transmission lines, generate the control strategy for load batch control; according to the control strategy, realize the load batch control of the whole network and / or each power transmission and transformation section.

[0105] It should be noted that the specific implementation of each operation can be the corresponding description of the method embodiment shown above Figure 1 The electronic device can be used to execute a method for realizing load batch control in the method embodiment of the present application above, and will not be specifically described here.

[0106] In an embodiment of the present invention, a computer-readable storage medium is also provided. The computer-readable storage medium is a memory device in a computer device and is used to store programs and data. It can be understood that the computer-readable storage medium here can include both the built-in storage medium in the computer device and, of course, the extended storage medium supported by the computer device. The computer-readable storage medium provides a storage space, and the operating system of the terminal is stored in this storage space. And, one or more instructions suitable for being loaded and executed by the processor are also stored in this storage space. These instructions can be one or more computer programs (including program codes). It should be noted that the computer-readable storage medium here can be a high-speed RAM memory or a non-volatile memory, such as at least one disk memory. One or more instructions stored in the computer-readable storage medium can be loaded and executed by the processor to implement the corresponding steps of the method for realizing load batch control in the above embodiment. Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk memories, CD-ROMs, optical memories, etc.) containing computer-usable program codes.

[0107] The specific embodiments described above further elaborate on the object, technical solution and beneficial effects of the present invention. It should be understood that the above description is only the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for implementing load batch control, characterized in that The method includes: Enter the parameter information of the operable transmission lines in the SCADA system according to the accident power curtailment sequence table, and establish the real-time topological relationship of the operable transmission lines in the SCADA system according to the parameter information; wherein, the real-time topological relationship is used to describe the subordinate relationship of switches; wherein, establishing the real-time topological relationship of the operable transmission lines specifically includes: taking any 10kV feeder switch included in the accident power curtailment sequence table of the substation as the charge starting point, controlling the charge starting point to migrate on the main transformer, transmission line and bus until encountering the 220kV side switch of the 500kV main transformer or the disconnected switch, and taking all the power equipment passed by the charge starting point during the migration process as the free pool of any 10kV feeder switch; according to the 10kV feeder switches in the free pool, preset the 220kV switch of the 500kV main transformer as the unidirectional main isolation pool, the 220kV line switch of the transmission section as the unidirectional auxiliary isolation pool, and the 220kV side switch of the 220kV main transformer as the unidirectional sub-isolation pool; verify the topological relationship of the 10kV feeder switch, and when the verification result of the topological relationship of the 10kV feeder switch is correct, establish the topological relationship between the unidirectional sub-isolation pool and the unidirectional auxiliary isolation pool, the topological relationship between the unidirectional sub-isolation pool and the unidirectional main isolation pool, and the topological relationship between the unidirectional auxiliary isolation pool and the unidirectional main isolation pool; wherein, verifying the topological relationship of the 10kV feeder switch specifically includes: when any 10kV feeder switch is only in one unidirectional sub-isolation pool, at least in one unidirectional main isolation pool, or in zero or more unidirectional auxiliary isolation pools, the topological relationship verification of the 10kV feeder switch is correct; When a power grid fault is detected, determine the load gap of the whole network and / or each transmission and transformation section, and the executable load of the whole network and / or each transmission and transformation section according to the SCADA system; Generate a control strategy for batch load control according to the load gap and the executable load, combined with the round information of the accident power curtailment sequence table and the real-time topological relationship of the operable transmission lines; Realize batch load control of the whole network and / or each transmission and transformation section according to the control strategy.

2. The method for realizing load batch control according to claim 1, wherein The parameter information includes one or more of the double name, round, sorting, load type, affiliated unit, and security load of the transmission line.

3. A method for implementing load batch control according to claim 1, characterized in that, Establishing the topological relationship between the unidirectional sub-isolation pool and the unidirectional auxiliary isolation pool includes: If all the feeder switches of any unidirectional sub-isolation pool are in any one or more unidirectional auxiliary isolation pools, then any unidirectional sub-isolation pool is subordinate to any one or more unidirectional auxiliary isolation pools; wherein, the unidirectional sub-isolation pool may not belong to any unidirectional auxiliary isolation pool; Establishing the topological relationship between the unidirectional sub-isolation pool and the unidirectional main isolation pool includes: if all the feeder switches of any unidirectional sub-isolation pool are in any one or more unidirectional main isolation pools, then any unidirectional sub-isolation pool is subordinate to any one or more unidirectional main isolation pools; wherein, the unidirectional sub-isolation pool belongs to at least one unidirectional main isolation pool; Establish the topological relationship between the unidirectional auxiliary isolation pool and the unidirectional main isolation pool, including: If all the feeder switches of any unidirectional auxiliary isolation pool are in any one or more unidirectional main isolation pools, then any unidirectional auxiliary isolation pool is subordinate to any one or more unidirectional main isolation pools; among them, the unidirectional auxiliary isolation pool belongs to at least one unidirectional main isolation pool.

4. A method for implementing load batch control according to claim 1, characterized in that, Determine the load gap of the entire network and / or each power transmission and transformation section according to the SCADA system, including: Subtract the actual load of the entire network from the load planned value issued by the superior dispatching to obtain the load gap of the entire network; Determine the active power difference of the active power of the 500kV main transformer's off-grid, the active power of the power transmission section, and the active power of the 220kV main transformer's off-grid. Subtract the active power difference from the set rated active power to obtain the load gap of each power transmission and transformation section; Determine the executable load of the entire network and / or each power transmission and transformation section according to the SCADA system, including: Conduct control verification of the 10kV feeder switches that can be pulled and limited in the SCADA system, and include the loads supplied by the 10kV feeder switches that pass the verification in the executable load.

5. The method for implementing load batch control according to claim 4, characterized in that, Conducting control verification of the 10kV feeder switches that can be pulled and limited in the SCADA system includes: switch position verification, switch power flow verification, basic model verification, protection signal verification, hanging plate verification, pressure plate verification, and communication protocol verification.

6. A method for implementing load batch control according to claim 1, characterized in that, Generate a control strategy for load batch control based on the load gap and the executable load, combined with the round information of the accident power curtailment sequence table, including: When in the state of power shortage in the entire network and no power shortage in each power transmission and transformation section, allocate the executable load of the entire network according to the proportion of the actual load value of the load in the power supply area round information until the total load batch control amount allocated is greater than the load gap of the entire network; When in the state of no power shortage in the entire network and power shortage in each power transmission and transformation section, transfer the loads within each power transmission and transformation section to the non-power shortage areas. If there is still a load gap in each power transmission and transformation section after the load transfer, according to the topological search results of the real-time topological relationship, allocate the executable load of each power transmission and transformation section according to the proportion of the actual load value of the load in the power transmission and transformation section round information until the total load batch control amount allocated is greater than the load gap of each power transmission and transformation section; When in the state of power shortage in the entire network and power shortage in each power transmission and transformation section, transfer the loads within each power transmission and transformation section to the non-power shortage areas. If only the state of power shortage in the entire network is processed after the load transfer, then execute the operation process when there is power shortage in the entire network and no power shortage in each power transmission and transformation section; if still in the state of power shortage in the entire network and power shortage in each power transmission and transformation section after the load transfer, allocate the executable load of the entire network according to the proportion of the actual load value of the first round of the power supply area. If still in the state of power shortage in the entire network and power shortage in each power transmission and transformation section after the first round of load allocation, then execute the operation process when there is power shortage in the entire network and power shortage in each power transmission and transformation section; if still in the state of power shortage in the entire network and power shortage in each power transmission and transformation section after the first round of load allocation, then execute the next round of load allocation until the total load batch control amount is greater than the load gap.

7. A device for realizing batch load control, characterized in that, The device includes: A topology relationship establishment module, configured to enter parameter information of operable transmission lines in the SCADA system according to the accident power curtailment sequence table, and establish a real-time topology relationship of the operable transmission lines in the SCADA system according to the parameter information; wherein, the real-time topology relationship is used to describe the subordinate relationship of switches; wherein, establishing the real-time topology relationship of the operable transmission lines specifically includes: taking any 10kV feeder switch included in the accident power curtailment sequence table of the substation as the charge starting point, controlling the charge starting point to migrate on the main transformer, transmission line and bus until encountering the 220kV side switch of the 500kV main transformer or the disconnected switch, and taking all the power equipment passed by the charge starting point during the migration process as the free pool of any 10kV feeder switch; according to the 10kV feeder switch in the free pool, preset the 220kV switch of the 500kV main transformer as the unidirectional main isolation pool, the 220kV line switch of the transmission section as the unidirectional auxiliary isolation pool, and the 220kV side switch of the 220kV main transformer as the unidirectional sub-isolation pool; verify the topology relationship of the 10kV feeder switch, and when the topology relationship verification result of the 10kV feeder switch is correct, establish the topology relationship between the unidirectional sub-isolation pool and the unidirectional auxiliary isolation pool, the topology relationship between the unidirectional sub-isolation pool and the unidirectional main isolation pool, and the topology relationship between the unidirectional auxiliary isolation pool and the unidirectional main isolation pool; wherein, verifying the topology relationship of the 10kV feeder switch specifically includes: when any 10kV feeder switch is only in one unidirectional sub-isolation pool, at least in one unidirectional main isolation pool, or in zero or more unidirectional auxiliary isolation pools, the topology relationship verification of the 10kV feeder switch is correct; A load parameter determination module, configured to determine the load gap amount of the entire network and / or each transmission and transformation section, and the executable load amount of the entire network and / or each transmission and transformation section according to the SCADA system when detecting that a power grid fault occurs; A control strategy generation module, configured to generate a control strategy for load batch control according to the load gap amount and the executable load amount, combined with the round information of the accident power curtailment sequence table and the real-time topology relationship of the operable transmission lines; A load control module, configured to implement load batch control of the entire network and / or each transmission and transformation section according to the control strategy.

8. An electronic device, characterized in that, The electronic device includes a processor, a memory, and a computer program stored on the memory and executable by the processor, wherein when the computer program is executed by the processor, the steps of a method for implementing load batch control as described in any one of claims 1 to 6 are implemented.

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