An active regulation method for realizing the capacity of low-frequency load shedding based on power grid topology

Abstract

The present invention relates to an active adjustment method for realizing the low-frequency load shedding capacity based on the power grid topology, which includes the following steps: select a section, and determine the initial nodes of the local power grid based on this section; read the real-time power flow value of this section and the low-frequency load shedding capacity of the local power grid, and calculate the deviation rate of the low-frequency load shedding capacity according to the real-time power flow value and the low-frequency load shedding capacity of the local power grid; conduct power grid topology analysis based on the initial nodes, search for all nodes connected to the initial nodes, obtain the power grid topology structure of the local power grid, and screen out the end switches; establish a power grid low-frequency load shedding information table, add low-frequency load shedding rounds, and add operation items for each low-frequency load shedding round; according to the order in the power grid low-frequency load shedding information table and the deviation rate of the low-frequency load shedding capacity, select the screened end switches to generate a low-frequency load shedding order table; remotely control the low-frequency load shedding devices within the end switch intervals according to the low-frequency load shedding order table to complete the active adjustment.

Description

Technical Field

[0001] The present invention relates to an active regulation method for realizing the low-frequency load shedding capacity based on the power grid topology, and belongs to the technical field of dynamic regulation of the low-frequency load shedding capacity of the power grid. Background Art

[0002] An isolated network refers to a state in which, after a power grid fault, a local power grid loses the connection section with the main network, and the load is driven by the power sources within the local power grid and is not electrically connected to other power systems. When an isolated network occurs, it is often accompanied by a drastic fluctuation in frequency. Therefore, to ensure the stable operation of the isolated network, the key lies in how to maintain the balance between the power output of the power sources within the local power grid and the load, and ensure that the frequency is within the range of 50±0.5HZ. The low-frequency load shedding device is exactly a device that, in order to prevent the frequency from dropping due to an accident, detects that the frequency drops to a certain limit value and quickly cuts off the line to restore the frequency of the local power grid, and it is called the "third line of defense" of the power system.

[0003] The main current existing technology approach is to conduct load forecasting and unit output forecasting for a certain local power grid (selecting a power flow section) that may form an isolated network at different time periods. The planned value of the low-frequency load shedding capacity for each time period of this local power grid is determined according to the difference between the load forecast value and the unit output forecast in the corresponding time period. Professional personnel, based on the calculated planned value, formulate a detailed list of the switching on and off of the low-frequency load shedding devices for the 10kV lines within the local power grid according to the "Power Grid Low-Frequency Load Shedding Information Table", indicate the execution strategies for each time period in the detailed list, and then send this detailed list to the dispatching personnel. The dispatching personnel, according to the specific requirements of each time period in the detailed list, give orders to each operation and maintenance unit to execute the specific switching on and off of the low-frequency load shedding devices, so as to achieve the matching of the actual value and the planned value of the low-frequency load shedding capacity for each time period of the local power grid.

[0004] The existing technology approach is extremely likely to cause the mismatch between the low-frequency load shedding capacity of the local power grid and the required capacity. The reasons are as follows:

[0005] In terms of the control idea, the low-frequency load shedding capacity is adjusted according to the low-frequency load shedding planned value rather than the real-time load and unit output, which requires a high prediction accuracy for each time period and is not easy to achieve. Especially when there are equipment accidents within the local power grid and the load or unit output changes, it may lead to serious inaccuracies in the prediction results, and the implementation of the plan will cause the mismatch between the low-frequency load shedding capacity of the local power grid and the required capacity.

[0006] On the technical level, the arrangement of the load shedding lines for the low-frequency load shedding of the local power grid is fixedly deployed according to the annual normal operation mode. When the internal operation mode of the local power grid changes, only professional personnel can re-arrange the load shedding lines and then convey them to the dispatching personnel for order operation. It is impossible to automatically generate the switching on and off strategies of the low-frequency load shedding devices and execute them, so there is an obvious lag.

[0007] Therefore, there is an urgent need for a technical method to solve the above two shortcomings, which can calculate the truly required low-frequency load shedding capacity of the local power grid according to the real-time power flow of the selected power flow section. Moreover, this technical method needs to adaptively identify the operation mode of the power grid, and can automatically adjust the load shedding lines and the switching on and off of the low-frequency load shedding devices when the operation mode in the local power grid changes, so as to achieve active regulation. Thus, the supporting role of the low-frequency load shedding device can be fully exerted, the balance between the output of the units and the load in the isolated power grid under accident conditions can be maintained, and the frequency stability can be maintained. Summary of the Invention

[0008] In order to solve the problems existing in the above-mentioned prior art, the present invention proposes an active regulation method for realizing low-frequency load shedding capacity based on the power grid topology. The deviation rate is determined according to the real-time power flow value of the selected section and the low-frequency load shedding capacity of the local power grid. Further, through the method of power grid topology, the end switches are quickly located, and the switching on and off of the low-frequency load shedding devices within the end switch intervals are automatically adjusted, so as to realize the dynamic adjustment of the low-frequency load shedding capacity and the load shedding lines of the local power grid following the operation mode.

[0009] The technical solution of the present invention is as follows:

[0010] On the one hand, the present invention provides an active regulation method for realizing low-frequency load shedding capacity based on the power grid topology, including the following steps:

[0011] Select a section and determine the initial nodes of the local power grid based on this section;

[0012] Read the real-time power flow value of this section and the low-frequency load shedding capacity of the local power grid, and calculate the low-frequency load shedding capacity deviation rate according to the real-time power flow value and the low-frequency load shedding capacity of the local power grid;

[0013] Based on this initial node, conduct power grid topology analysis, search for all nodes connected to this initial node, obtain the power grid topology structure of this local power grid, and screen out the end switches in the power grid topology structure;

[0014] Establish a power grid low-frequency load shedding information table, add low-frequency load shedding rounds, and add operation items for each low-frequency load shedding round; according to the order in the power grid low-frequency load shedding information table and the low-frequency load shedding capacity deviation rate, select the screened end switches to generate a low-frequency load shedding order table;

[0015] According to the low-frequency load shedding order table, remotely control the switching on and off of the low-frequency load shedding devices within the end switch intervals to complete the active regulation.

[0016] As a preferred implementation manner, the step of conducting power grid topology analysis based on this initial node is specifically as follows:

[0017] Abstract the power network as a topology graph, which is composed of two types of components, namely nodes and branches, spliced together;

[0018] The node components are composed of the main equipment of the power system, and the branch components are composed of switchgear;

[0019] Through the switch connection relationship between the main equipment, a grid topology structure of nodes and branches is formed;

[0020] Using the breadth-first search algorithm, select the initial node as the starting point, search for all nodes connected to the starting point, and filter out the terminal switches.

[0021] As a preferred implementation, the steps of reading the real-time power flow value of the section and the low-frequency load shedding capacity of the local power grid, and calculating the low-frequency load shedding capacity deviation rate according to the real-time power flow value and the low-frequency load shedding capacity of the local power grid are specifically as follows:

[0022] Read the real-time power flow value of the section and determine whether the real-time power flow value is negative. If the real-time power flow value is negative, exit the regulation;

[0023] If the real-time power flow value is positive, use the real-time power flow value as the required capacity P for low-frequency load shedding of the local power grid 需要 , and read the actual low-frequency load shedding capacity P of the current local power grid 实际 ;

[0024] Calculate the low-frequency load shedding capacity deviation rate

[0025] As a preferred implementation, in the step of establishing the low-frequency load shedding information table of the power grid, adding the low-frequency load shedding rounds, and adding operation items for each low-frequency load shedding round;

[0026] The operation items specifically include the low-frequency load shedding device information of the load-shedding line, the line load information, and the sequence information.

[0027] As a preferred implementation, the steps of selecting the filtered terminal switches according to the sequence in the low-frequency load shedding information table of the power grid and the low-frequency load shedding capacity deviation rate, and generating the low-frequency load shedding sequence table are specifically as follows:

[0028] Set the deviation rate threshold range;

[0029] When the low-frequency load shedding capacity deviation rate is higher than the deviation rate threshold range, check the on / off status of the low-frequency load shedding devices of the filtered terminal switches, and filter out all unactivated low-frequency load shedding devices;

[0030] Read the sequence of each operation item in the low-frequency load shedding information table of the power grid, select the unactivated low-frequency load shedding devices one by one in ascending order, and count the total line load of the corresponding load-shedding lines until the total line load of the selected load-shedding lines is greater than the required capacity for low-frequency load shedding of the local power grid or all unactivated low-frequency load shedding devices have been selected, and generate the low-frequency load shedding sequence table;

[0031] When the deviation rate of the low-frequency load shedding capacity is lower than the deviation rate threshold range, check the power-on and power-off status of the low-frequency load shedding devices of the selected terminal switches, and screen out all the powered-on low-frequency load shedding devices;

[0032] Read the order of each operation item in the power grid low-frequency load shedding information table, select the powered-on low-frequency load shedding devices one by one in reverse order, and count the total line load of the corresponding load-shedding lines until the total line load of the selected load-shedding lines is greater than the low-frequency load shedding required capacity of the local power grid or all unpowered low-frequency load shedding devices are selected, and generate a low-frequency load shedding order table.

[0033] As a preferred embodiment, the step of remotely controlling the power-on and power-off of the low-frequency load shedding devices within the terminal switch interval according to the low-frequency load shedding order table is specifically as follows:

[0034] If the deviation rate of the low-frequency load shedding capacity is higher than the deviation rate threshold range, then according to the generated low-frequency load shedding order table, remotely control and power on the low-frequency load shedding devices one by one in sequence;

[0035] If the deviation rate of the low-frequency load shedding capacity is lower than the deviation rate threshold range, then according to the generated low-frequency load shedding order table, remotely control and power off the low-frequency load shedding devices one by one in sequence.

[0036] As a preferred embodiment, after the active regulation is completed, the regulation information is also sent to the monitoring end.

[0037] As a preferred embodiment, after the active regulation is completed, recalculate the current deviation rate of the low-frequency load shedding capacity. If the current deviation rate of the low-frequency load shedding capacity does not meet the set threshold range and there are no low-frequency load shedding devices that can be powered on or off, then send an alarm message to the monitoring end.

[0038] On the other hand, the present invention provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, it implements the active regulation method for realizing the low-frequency load shedding capacity based on the power grid topology as described in any embodiment of the present invention.

[0039] On yet another aspect, the present invention provides a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, it implements the active regulation method for realizing the low-frequency load shedding capacity based on the power grid topology as described in any embodiment of the present invention.

[0040] The present invention has the following beneficial effects:

[0041] 1. An active adjustment method for realizing the low-frequency load shedding capacity based on the power grid topology according to the present invention determines the deviation rate based on the real-time power flow value of the selected section and the low-frequency load shedding capacity of the local power grid, and further locates the end switch quickly through the power grid topology method, automatically adjusts the switching on and off of the low-frequency load shedding devices within the end switch interval, and realizes the dynamic adjustment of the low-frequency load shedding capacity of the local power grid and the load shedding line following the operation mode.

[0042] 2. An active adjustment method for realizing the low-frequency load shedding capacity based on the power grid topology according to the present invention changes the required capacity for judging the low-frequency load shedding of the local power grid from the original predicted value or planned value to the real-time value in the source idea, and no longer requires the load forecasting accuracy. Even in the case of an accident, it can accurately calculate the required low-frequency load shedding capacity of the local power grid.

[0043] 3. An active adjustment method for realizing the low-frequency load shedding capacity based on the power grid topology according to the present invention can dynamically adjust the low-frequency load shedding capacity and the load shedding line scheme following the change of the operation mode as long as it conducts the power grid topology analysis according to the pre-established power grid low-frequency load shedding information table. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is the flowchart of the method in Embodiment 1 of the present invention;

[0045] Figure 2 It is the example diagram of the power grid topology analysis according to the section in the embodiment of the present invention;

[0046] Figure 3 It is the example diagram of the power grid topology structure obtained in the embodiment of the present invention;

[0047] Figure 4 It is the flowchart of the switching on and off of the low-frequency load shedding devices in the embodiment of the present invention;

[0048] Figure 5 It is the example diagram of the serial remote control operation of the low-frequency load shedding devices in the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0049] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0050] It should be understood that the step numbers used in the text are only for convenient description and do not limit the execution order of the steps.

[0051] It should be understood that the terms used in the specification of the present invention are merely for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0052] The terms "comprising" and "including" indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations.

[0053] The term "and / or" refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0054] Embodiment 1:

[0055] See Figure 1 , an active regulation method for realizing the low-frequency load shedding capacity based on the power grid topology, comprising the following steps:

[0056] Select a section, initialize the adjacency matrix A according to this section, update the adjacency matrix A in real time, judge whether the operation mode has changed. If it has changed, return to update the adjacency matrix A. If it has not changed, set the node j where the section is located as the initial node of the local power grid;

[0057] This method realizes the real-time acquisition, processing and monitoring of power grid data based on the SCADA data acquisition and monitoring control system;

[0058] Read the real-time power flow value of this section and the low-frequency load shedding capacity of the local power grid through the SCADA data acquisition and monitoring control system, and calculate the deviation rate of the low-frequency load shedding capacity according to the real-time power flow value and the low-frequency load shedding capacity of the local power grid;

[0059] Based on this initial node, conduct power grid topology analysis, search for all nodes connected to this initial node, obtain the power grid topology structure of this local power grid, and screen out the end switches in the power grid topology structure;

[0060] Establish a power grid low-frequency load shedding information table through the drawing and modeling tool of the SCADA data acquisition and monitoring control system, add low-frequency load shedding rounds, and add operation items for each low-frequency load shedding round; according to the order in the power grid low-frequency load shedding information table and the deviation rate of the low-frequency load shedding capacity, select the screened end switches to generate a low-frequency load shedding order table;

[0061] Remote control the low-frequency load shedding devices within the end switch intervals according to the low-frequency load shedding order table to complete the active regulation. In this embodiment, the low-frequency load shedding device refers to the low-frequency load shedding soft pressure plate.

[0062] In this embodiment, the SCADA data acquisition and monitoring control system is used to automatically call the power flow calculation service, and the power flow calculation results are displayed in real time in the background, and the load shedding amount of each active regulation operation is automatically counted and analyzed.

[0063] As a preferred implementation manner of this embodiment, specifically refer to Figure 2 , the step of performing power grid topology analysis based on this initial node is specifically as follows:

[0064] Abstract the power network as a topology graph, which is spliced by two types of components: nodes and branches;

[0065] The node components are composed of the main equipment of the power system, including main transformers, busbars, and lines. The branch components are composed of switching equipment;

[0066] Through the switch connection relationship between the main equipment, a power grid topology structure diagram of nodes - branches is formed;

[0067] According to the power grid topology structure diagram, identify the load shedding lines by positioning through the selected section or main equipment. Adopt the breadth - first search algorithm, select the initial node as the starting point, search for all nodes connected to the starting point, and screen out the 10kV end switches. The power grid topology analysis is defined based on the power grid standard topology model that complies with IEC61970 and can be directly reused.

[0068] As a preferred implementation manner of this embodiment, specifically refer to Figure 3 , the step of reading the real - time power flow value of this section and the local power grid low - frequency load shedding capacity, and calculating the low - frequency load shedding capacity deviation rate according to the real - time power flow value and the local power grid low - frequency load shedding capacity is specifically as follows:

[0069] Create the initial node of the local power grid according to the specific section ( Figure 3 the node "0" in), if the real - time power flow value of this section is positive, it means that the section delivers electric energy to the local power grid, otherwise it means that the local power grid feeds electric energy back to the section, which is consistent with the existing power flow direction regulation of the power system.

[0070] Read the real - time power flow value of the section and judge whether the real - time power flow value is negative. If the real - time power flow value is negative, then exit the regulation; when the real - time value of the section power flow is negative, after the accident, the output of the isolated network unit is greater than the load, and the balance can be achieved by quickly reducing the output of the unit through the AGC system of the unit. Therefore, when the real - time value of the section power flow is negative, there is no need to intervene through the regulation and control integrated technology support system.

[0071] If the real - time power flow value is positive, then use the real - time power flow value as the required capacity for low - frequency load shedding of this local power grid, that is, P 需要 =P 断面 , and read the actual low - frequency load shedding capacity P 实际;

[0072] Calculate the deviation rate of low-frequency load shedding capacity

[0073] As a preferred implementation manner of this embodiment, in the step of establishing the low-frequency load shedding information table of the power grid, adding low-frequency load shedding rounds, and adding operation items for each low-frequency load shedding round;

[0074] The operation items specifically include the low-frequency load shedding device information of the load-shedding line, the line load information, and the sequence information.

[0075] As a preferred implementation manner of this embodiment, refer to Figure 4 , the step of selecting the screened end switches according to the sequence and the low-frequency load shedding capacity deviation rate in the low-frequency load shedding information table of the power grid to generate a low-frequency load shedding sequence table is specifically as follows:

[0076] Set the deviation rate threshold range; in this embodiment, the deviation rate threshold range is set to (-10%, 10%); when the low-frequency load shedding capacity deviation rate belongs to the deviation rate threshold range, no active adjustment is performed.

[0077] When the low-frequency load shedding capacity deviation rate is higher than 10%, locate the 10kv end switches 10 - 17 through the power grid topology structure diagram shown in Figure 3 ; check the switching status of the low-frequency load shedding soft pressure plates of the screened end switches, and further screen out all the unactivated low-frequency load shedding soft pressure plates;

[0078] Read the sequence of each operation item in the low-frequency load shedding information table of the power grid, select the unactivated low-frequency load shedding soft pressure plates one by one in the positive order, and count the total line load of the corresponding load-shedding lines until the total line load of the selected load-shedding lines is greater than the low-frequency load shedding required capacity of this local power grid or all the unactivated low-frequency load shedding soft pressure plates are selected, and automatically generate a low-frequency load shedding sequence table;

[0079] If the low-frequency load shedding capacity deviation rate is lower than -10%, check the switching status of the low-frequency load shedding soft pressure plates of the screened end switches, and screen out all the activated low-frequency load shedding soft pressure plates;

[0080] Read the sequence of each operation item in the low-frequency load shedding information table of the power grid, select the activated low-frequency load shedding soft pressure plates one by one in the reverse order, and count the total line load of the corresponding load-shedding lines until the total line load of the selected load-shedding lines is greater than the low-frequency load shedding required capacity of this local power grid or all the unactivated low-frequency load shedding soft pressure plates are selected, and generate a low-frequency load shedding sequence table.

[0081] As a preferred implementation manner of this embodiment, the step of remotely controlling the switching of the low-frequency load shedding devices within the end switch interval according to the low-frequency load shedding sequence table is specifically as follows:

[0082] If the deviation rate of the low-frequency load shedding capacity is higher than the deviation rate threshold range, then according to the generated low-frequency load shedding sequence table, the low-frequency load shedding soft pressure plates are sequentially put into operation one by one through remote control.

[0083] If the deviation rate of the low-frequency load shedding capacity is lower than the deviation rate threshold range, then according to the generated low-frequency load shedding sequence table, the low-frequency load shedding soft pressure plates are sequentially withdrawn one by one through remote control.

[0084] After the putting into and withdrawal of the low-frequency load shedding soft pressure plates are completed, the active regulation work of the low-frequency load shedding capacity of this local power grid ends.

[0085] As a preferred implementation manner of this embodiment, after the active regulation is completed, the regulation information is also sent to the monitoring end to meet the daily monitoring requirements of the power grid regulation operation.

[0086] As a preferred implementation manner of this embodiment, after the active regulation is completed, the current deviation rate of the low-frequency load shedding capacity is recalculated. If the current deviation rate of the low-frequency load shedding capacity does not meet the set threshold range, and according to the power grid topology information, there are no redundant load shedding lines to be selected in the power grid low-frequency load shedding information table, then an alarm message is sent to the monitoring end.

[0087] See Figure 5 , in some embodiments, the present invention uses remote control to perform the putting into and withdrawal operations of the low-frequency load shedding soft pressure plates in a serial remote control operation mode; multiple anti-misoperation functions are also set in the serial remote control operation link, mainly including status verification, channel verification, and signal verification. When remotely controlling the low-frequency load shedding soft pressure plate of a specific line, remote control operation should be prohibited if the device to be operated is in a non-operating state, the master station channel is abnormal, or there are abnormal signals in the device.

[0088] In some embodiments, the manual monitoring function can be set to be enabled. After the low-frequency load shedding sequence table is generated, it is displayed in a pop-up window on the human-machine interface at the monitoring end, and after being verified by the dispatching personnel and authenticating the encrypted information, the remote control strategy is executed.

[0089] Embodiment 2:

[0090] The present invention provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, it implements the method for actively regulating the low-frequency load shedding capacity based on the power grid topology as described in any embodiment of the present invention.

[0091] Embodiment 3:

[0092] The present invention provides a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, it implements the method for actively regulating the low-frequency load shedding capacity based on the power grid topology as described in any embodiment of the present invention.

[0093] The above are only embodiments of the present invention, and do not thereby limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall equally be included within the patent protection scope of the present invention.

Claims

1. An active regulation method for realizing the capacity of low-frequency load shedding based on power grid topology, characterized in that, It includes the following steps: Select a cross-section and determine the initial nodes of the local power grid based on this cross-section; Read the real-time power flow value of this cross-section and the low-frequency load shedding capacity of the local power grid, and calculate the deviation rate of the low-frequency load shedding capacity according to the real-time power flow value and the low-frequency load shedding capacity of the local power grid; Conduct power grid topology analysis based on this initial node, search for all nodes connected to this initial node, obtain the power grid topology structure of this local power grid, and screen out the end switches in the power grid topology structure; Establish a power grid low-frequency load shedding information table, add low-frequency load shedding rounds, and add operation items for each low-frequency load shedding round; Select the screened end switches according to the order in the power grid low-frequency load shedding information table and the deviation rate of the low-frequency load shedding capacity, and generate a low-frequency load shedding order table; Remote control the low-frequency load shedding devices within the end switch intervals to be put into or taken out according to the low-frequency load shedding order table to complete the active adjustment; Among them, the step of reading the real-time power flow value of this cross-section and the low-frequency load shedding capacity of the local power grid, and calculating the deviation rate of the low-frequency load shedding capacity according to the real-time power flow value and the low-frequency load shedding capacity of the local power grid is specifically as follows: Read the real-time power flow value of the cross-section and judge whether the real-time power flow value is negative. If the real-time power flow value is negative, exit the adjustment; If the real-time power flow value is positive, then use the real-time power flow value as the required capacity P for under-frequency load shedding of the local power grid 需要 , and read the actual capacity P of the under-frequency load shedding of the current local power grid 实际 ; Calculate the deviation rate of the low-frequency load shedding capacity Among them, in the step of establishing a power grid low-frequency load shedding information table, adding low-frequency load shedding rounds, and adding operation items for each low-frequency load shedding round; The operation items specifically include the low-frequency load shedding device information of the load-shedding line, the line load information, and the order information; Among them, the step of selecting the screened end switches according to the order in the power grid low-frequency load shedding information table and the deviation rate of the low-frequency load shedding capacity, and generating a low-frequency load shedding order table is specifically as follows: Set the deviation rate threshold range; When the deviation rate of the low-frequency load shedding capacity is higher than the deviation rate threshold range, check the put-in / take-out status of the low-frequency load shedding devices of the screened end switches, and screen out all unput low-frequency load shedding devices; Read the order of each operation item in the power grid low-frequency load shedding information table, select the unput low-frequency load shedding devices one by one in positive order, and count the total line load of the corresponding load-shedding lines until the total line load of the selected load-shedding lines is greater than the low-frequency load shedding required capacity of this local power grid or all unput low-frequency load shedding devices are selected, and generate a low-frequency load shedding order table; If the deviation rate of the low-frequency load shedding capacity is lower than the deviation rate threshold range, check the put-in / take-out status of the low-frequency load shedding devices of the screened end switches, and screen out all put low-frequency load shedding devices; Read the order of each operation item in the power grid low-frequency load shedding information table, select the put low-frequency load shedding devices one by one in reverse order, and count the total line load of the corresponding load-shedding lines until the total line load of the selected load-shedding lines is greater than the low-frequency load shedding required capacity of this local power grid or all unput low-frequency load shedding devices are selected, and generate a low-frequency load shedding order table.

2. The active regulation method for realizing the low-frequency load shedding capacity based on the power grid topology according to claim 1, wherein The step of conducting power grid topology analysis based on this initial node is specifically as follows: Abstract the power network as a topology graph, which is composed of two types of components, namely nodes and branches; The node components are composed of the main equipment of the power system, and the branch components are composed of switch equipment; A grid topology structure of nodes - branches is formed through the switching connection relationship between the master devices; The breadth - first search algorithm is adopted to select the initial node as the starting point, search for all nodes connected to the starting point, and screen out the end switches.

3. An active regulation method for realizing the active regulation of the low-frequency load shedding capacity based on the power grid topology according to claim 1, characterized in that The steps of remotely controlling the power - on and power - off of the under - frequency load - shedding devices within the end - switch interval according to the under - frequency load - shedding sequence table are specifically as follows: If the deviation rate of the under - frequency load - shedding capacity is higher than the deviation rate threshold range, then according to the generated under - frequency load - shedding sequence table, the under - frequency load - shedding devices are remotely controlled and turned on one by one in sequence; If the deviation rate of the under - frequency load - shedding capacity is lower than the deviation rate threshold range, then according to the generated under - frequency load - shedding sequence table, the under - frequency load - shedding devices are remotely controlled and turned off one by one in sequence.

4. The active regulation method for realizing the low-frequency load shedding capacity based on the power grid topology according to claim 1, wherein: After the active regulation is completed, the regulation information is also sent to the monitoring end.

5. The active adjustment method for realizing the low-frequency load shedding capacity based on the power grid topology according to claim 1, wherein: After the active regulation is completed, the current deviation rate of the under - frequency load - shedding capacity is recalculated. If the current deviation rate of the under - frequency load - shedding capacity does not meet the set threshold range and there are no more under - frequency load - shedding devices that can be powered on or off, an alarm message is sent to the monitoring end.

6. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the active regulation method for the under - frequency load - shedding capacity based on the grid topology as described in any one of claims 1 to 5.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the active regulation method for the under - frequency load - shedding capacity based on the grid topology as described in any one of claims 1 to 5.

Images