Method and device for evaluating voltage regulation capability, storage medium and electronic equipment

Abstract

The application discloses a kind of voltage regulation capability evaluation method, device, storage medium and electronic equipment.Method comprising: obtaining the multiple bus bars corresponding to target area power grid, wherein the multiple bus bars at least include: hub bus bar;Determine the multiple evaluation parameters corresponding to multiple reactive power regulation devices in the target area power grid, wherein the multiple evaluation parameters at least include: reactive power capacity can be increased, reactive power capacity can be reduced, voltage sensitivity;Based on the multiple evaluation parameters, determine the voltage regulation capability evaluation result of the hub bus bar.The present application solves the technical problems of poor evaluation accuracy and poor practicability caused by the incomplete consideration of evaluation indicators of voltage regulation capability in the prior art.

Description

Technical Field

[0001] This invention relates to the field of voltage regulation technology, and more specifically, to a method, apparatus, storage medium, and electronic device for evaluating voltage regulation capability. Background Technology

[0002] Under the premise of safe and stable operation of the power system, the reactive power regulation system of the power grid aims to improve the qualification of voltage and reactive power and the economic efficiency of grid operation by carrying out comprehensive voltage and reactive power control, thereby achieving high-level voltage operation and hierarchical and regional local balance of reactive power as much as possible. Existing voltage regulation capability assessment systems provide some simple statistical characteristics of the voltage and reactive power operation status of the power system based on voltage and reactive power operation guidelines and regulations. However, existing assessment index systems lack consideration for regional coordinated control strategies and have many shortcomings in tracking the causes of unreasonable voltage and reactive power operation status. They cannot meet the statistical requirements for voltage regulation capability indicators, and the resulting voltage regulation capability assessment results have low accuracy and relatively poor practicality.

[0003] There is currently no effective solution to the above problems. Summary of the Invention

[0004] The present invention provides a method, apparatus, storage medium and electronic device for evaluating voltage regulation capability, so as to at least solve the technical problem that the evaluation indicators of voltage regulation capability in the prior art do not take into account all factors, resulting in poor evaluation accuracy and poor practicality.

[0005] According to one aspect of the present invention, a method for evaluating voltage regulation capability is provided, comprising: acquiring multiple buses corresponding to a target area power grid, wherein the multiple buses include at least a central bus; determining multiple evaluation parameters corresponding to multiple reactive power regulation devices in the target area power grid, wherein the multiple evaluation parameters include at least: reactive power capacity can be increased, reactive power capacity can be reduced, and voltage sensitivity; and determining the voltage regulation capability evaluation result of the central bus based on the multiple evaluation parameters.

[0006] Optionally, based on the above-mentioned multiple evaluation parameters, the voltage regulation capability evaluation result of the central bus is determined, including: obtaining the upper voltage limit and lower voltage limit of the central bus; and calculating the voltage regulation capability evaluation result based on the upper voltage limit, the lower voltage limit, and the above-mentioned multiple evaluation parameters.

[0007] Optionally, the voltage regulation capability assessment result includes the first voltage upward regulation capability and the first voltage downward regulation capability corresponding to the central bus. Based on the voltage upper limit, the voltage lower limit, and the multiple assessment parameters, the voltage regulation capability assessment result is calculated, including: calculating the second voltage upward regulation capability and the second voltage downward regulation capability corresponding to the multiple reactive power regulation devices based on the multiple assessment parameters corresponding to the multiple reactive power regulation devices; calculating the first voltage upward regulation capability based on the voltage upper limit, the voltage lower limit, and the second voltage upward regulation capability; and calculating the first voltage downward regulation capability based on the voltage upper limit, the voltage lower limit, and the second voltage downward regulation capability.

[0008] Optionally, obtaining multiple busbars corresponding to the target area power grid includes: establishing an object model of the target area power grid; and determining the multiple busbars corresponding to the target area power grid based on the object model.

[0009] Optionally, the aforementioned multiple busbars also include: a first busbar corresponding to a first voltage level and a second busbar corresponding to a second voltage level, wherein: the aforementioned multiple reactive power regulation devices include at least: a generator of the first power plant corresponding to the first voltage level, low-voltage capacitors and reactors in the first substation corresponding to the first voltage level, a generator of the second power plant corresponding to the second voltage level, and low-voltage capacitors and reactors in the second substation corresponding to the third voltage level.

[0010] Optionally, the above method further includes: obtaining the voltage amplitude adjustment parameters corresponding to the central bus; and calculating the steady-state adjustable voltage amplitude corresponding to the central bus based on the voltage amplitude adjustment parameters, wherein the steady-state adjustable voltage amplitude includes at least: the steady-state adjustable voltage margin and the steady-state adjustable voltage margin of the central bus.

[0011] According to another aspect of the present invention, a voltage regulation capability evaluation device is also provided, comprising: an acquisition module for acquiring multiple buses corresponding to a target area power grid, wherein the multiple buses include at least a central bus; a first determination module for determining multiple evaluation parameters corresponding to multiple reactive power regulation devices in the target area power grid, wherein the multiple evaluation parameters include at least: reactive power capacity can be increased, reactive power capacity can be reduced, and voltage sensitivity; and a second determination module for determining the voltage regulation capability evaluation result of the central bus based on the multiple evaluation parameters.

[0012] According to another aspect of the present invention, a non-volatile storage medium is also provided, wherein the non-volatile storage medium stores a plurality of instructions adapted for loading by a processor and executing any one of the voltage regulation capability evaluation methods described above.

[0013] According to another aspect of the present invention, an electronic device is also provided, including a memory and a processor, wherein the memory stores a computer program and the processor is configured to run the computer program to perform any of the above-described voltage regulation capability evaluation methods.

[0014] According to another aspect of the present invention, a processor is also provided, which is used to run a program, wherein the program executes any one of the voltage regulation capability evaluation methods described above.

[0015] In this embodiment of the invention, a voltage regulation capability assessment method is adopted. This involves acquiring multiple buses corresponding to the target area's power grid, where the multiple buses include at least a central bus; determining multiple assessment parameters corresponding to multiple reactive power regulation devices in the target area's power grid, where the multiple assessment parameters include at least: the ability to increase reactive power capacity, the ability to reduce reactive power capacity, and voltage sensitivity; and based on these multiple assessment parameters, determining the voltage regulation capability assessment result of the central bus. This achieves the goal of selecting multiple assessment parameters from multiple levels to assess the voltage regulation capability of the central bus, thereby improving the accuracy of voltage regulation capability assessment and optimizing the assessment results. Furthermore, it solves the technical problem of poor assessment accuracy and practicality caused by the incomplete consideration of factors in the voltage regulation capability assessment indicators of existing technologies. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0017] Figure 1 This is a flowchart of a method for evaluating voltage regulation capability according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of a voltage regulation capability evaluation device according to an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of an electronic device used to implement the voltage regulation capability evaluation method in the embodiments of the present invention. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0021] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0022] Currently, based on the "soft partitioning" three-level voltage control mode, the overall system structure is divided into three levels of voltage control: Level 1, Level 2, and Level 3. At the Level 3 control level, the calculation is mainly based on global voltage and reactive power optimization. According to the current distribution of reactive power across the entire network, the reactive power output and reserve status of power plants, substations, and dispatching points are comprehensively considered. Under the conditions of safety constraints such as voltage compliance and power flow not exceeding limits, the optimization calculation is performed with the goal of minimizing network loss, and the optimal reactive power and voltage optimization target value for the entire network is given.

[0023] Due to the distributed and regional characteristics of reactive power in the power grid, the smart grid AVC system automatically divides the grid into several regions based on the characteristics of reactive power and voltage control. Each region selects a major key bus as the central bus, and the voltage control target of the central bus is based on a target given by global reactive power optimization. Equipment within the same region exhibits strong coupling in reactive power and voltage control characteristics, while equipment between regions exhibits loose coupling. This zoning control approach aligns with the principle of hierarchical and zoning control of reactive power in the power grid. Furthermore, this zoning is automatically completed online by the system, making it a "soft zoning" that can adapt to changes in the power grid. At the secondary control level, secondary control consists of three modules: power plant control, substation control, and upper / lower level coordination control. The power plant control module primarily controls selectable kV thermal power plants and new energy power plants. Based on the control value of the regional central bus voltage given by the tertiary control, the system uses a sensitivity algorithm to calculate the control target value of the high-voltage bus of the power plant related to this central bus. Combining this with the regulation capacity of the power plant substation, the system comprehensively calculates the control voltage of the power plant's high-voltage bus and sends it to the power plant substation.

[0024] The substation control module primarily controls the 500kV substation. Based on the target value of the regional central bus voltage provided by the three-level control system, the system uses a sensitivity algorithm to calculate the bus control target values ​​for all substations within this region. By comprehensively considering the safety constraints and regulation targets of the high, medium, and low voltage bus voltages, combined with the substation's equipment operating conditions and the bus voltage control targets provided by the three-level control system, a comprehensive analysis and calculation is performed. This process predicts the control results for currently available discrete equipment to determine its controllability and generate specific control strategies for each device, which are then distributed to the central control station or the substation's automation system for execution.

[0025] However, the existing voltage regulation capability assessment system provides some simple statistical characteristics of the voltage and reactive power operation status of the power system based on the voltage and reactive power operation guidelines and regulations. However, the existing assessment index system lacks consideration of regional coordinated control strategies and has many shortcomings in tracking the causes of unreasonable voltage and reactive power operation status. It cannot meet the statistical requirements for voltage regulation capability indicators, and the resulting voltage regulation capability assessment results have low accuracy and relatively poor practicality.

[0026] To address the aforementioned problems, this invention provides a method embodiment for evaluating voltage regulation capability. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0027] Figure 1 This is a flowchart of a method for evaluating voltage regulation capability according to an embodiment of the present invention, such as... Figure 1 As shown, the method includes the following steps:

[0028] Step S102: Obtain multiple busbars corresponding to the power grid in the target area, wherein the multiple busbars include at least: the central busbar;

[0029] Step S104: Determine multiple evaluation parameters corresponding to multiple reactive power regulation devices in the target area power grid, wherein the multiple evaluation parameters include at least: reactive power capacity can be increased, reactive power capacity can be reduced, and voltage sensitivity.

[0030] Step S106: Based on the above-mentioned multiple evaluation parameters, determine the evaluation result of the voltage regulation capability of the above-mentioned central bus.

[0031] In this embodiment of the invention, a voltage regulation capability assessment method is adopted. This involves acquiring multiple buses corresponding to the target area's power grid, where the multiple buses include at least a central bus; determining multiple assessment parameters corresponding to multiple reactive power regulation devices in the target area's power grid, where the multiple assessment parameters include at least: the ability to increase reactive power capacity, the ability to reduce reactive power capacity, and voltage sensitivity; and based on these multiple assessment parameters, determining the voltage regulation capability assessment result of the central bus. This achieves the goal of selecting multiple assessment parameters from multiple levels to assess the voltage regulation capability of the central bus, thereby improving the accuracy of voltage regulation capability assessment and optimizing the assessment results. Furthermore, it solves the technical problem of poor assessment accuracy and practicality caused by the incomplete consideration of factors in the voltage regulation capability assessment indicators of existing technologies.

[0032] Optionally, the aforementioned reactive power regulation equipment is used to dispatch the voltage within the power grid of the aforementioned target area.

[0033] Optionally, the aforementioned multiple busbars further include: a first busbar corresponding to a first voltage level and a second busbar corresponding to a second voltage level, wherein the aforementioned multiple reactive power regulating devices include at least: a generator of the first power plant corresponding to the first voltage level, low-voltage capacitors and reactors in the first substation corresponding to the first voltage level, a generator of the second power plant corresponding to the second voltage level, and low-voltage capacitors and reactors in the second substation corresponding to the third voltage level. For example, the first busbar mentioned above can be the 500kV busbar corresponding to a 500kV substation, then the generator of the first power plant mentioned above is the generator of the 500kV power plant, and the low-voltage capacitors and reactors in the first substation are the low-voltage capacitors and reactors in the 500kV power plant; the second busbar mentioned above can be the 220kV busbar corresponding to a 220kV substation, then the generator of the second power plant mentioned above is the generator of the 220kV power plant; the third voltage level mentioned above can be 1000kV, then the low-voltage capacitors and reactors in the second substation mentioned above are the low-voltage capacitors and reactors in the 1000kV substation.

[0034] Optionally, the above voltage regulation capability assessment results shall include at least: the voltage upward regulation capability and voltage downward regulation capability corresponding to the above central bus.

[0035] In one optional embodiment, the voltage regulation capability assessment result of the central bus is determined based on the above-mentioned multiple evaluation parameters, including:

[0036] Obtain the upper and lower voltage limits of the aforementioned central bus;

[0037] Based on the above-mentioned upper voltage limit, lower voltage limit, and multiple evaluation parameters, the above-mentioned voltage regulation capability evaluation results are calculated.

[0038] Optionally, the above voltage regulation capability assessment results include the first voltage upward regulation capability and the first voltage downward regulation capability corresponding to the above central bus.

[0039] In an optional embodiment, the voltage regulation capability assessment result includes a first voltage upward regulation capability and a first voltage downward regulation capability corresponding to the central bus. Based on the upper voltage limit, the lower voltage limit, and the multiple assessment parameters, the voltage regulation capability assessment result is calculated, including:

[0040] Based on the above evaluation parameters corresponding to the above reactive power regulation devices, the second voltage upward regulation capability and the second voltage downward regulation capability corresponding to the above reactive power regulation devices are calculated.

[0041] The first voltage upward adjustment capability is calculated based on the above-mentioned upper voltage limit, the above-mentioned lower voltage limit, and the above-mentioned second voltage upward adjustment capability.

[0042] The first voltage downward adjustment capability is calculated based on the aforementioned upper voltage limit, lower voltage limit, and second voltage downward adjustment capability.

[0043] Optionally, based on the above-mentioned increase in reactive power capacity and voltage sensitivity, the above-mentioned second voltage upward regulation capability is calculated; based on the above-mentioned decrease in reactive power capacity and voltage sensitivity, the above-mentioned second voltage downward regulation capability is calculated.

[0044] Optionally, when the aforementioned reactive power regulation equipment is a generator of the first power plant corresponding to the first voltage level, such as a generator of a 500kV power plant, the aforementioned voltage sensitivity is used to indicate the impact of reactive power regulation of the 500kV power plant's generator on the central bus voltage. This can be simplified to the voltage sensitivity S1 of reactive power injection from the high-voltage side bus of the 500kV power plant on the evaluation object, i.e., each central bus. The sensitivity matrix can be obtained using the quasi-steady-state reactive power voltage sensitivity calculation method, as shown in the following formula:

[0045]

[0046] Where S1 is the sensitivity matrix, and since the 500kV system forms a loop, S1 is a full matrix; n is the total number of 500kV power plants in the power grid, m is the number of central buses included in the evaluation model, and S... ji The sensitivity of reactive power injection from the i-th 500kV power plant to the voltage of the j-th central bus is given.

[0047] The further obtained index of the 500kV power plant's reactive power regulation capability to the central bus voltage (i.e., the aforementioned second voltage regulation capability) is as follows:

[0048]

[0049] Further, the downward regulation capability of the reactive power of the 500kV power plant to the central bus voltage (i.e., the aforementioned second voltage downward regulation capability) is obtained as follows:

[0050]

[0051] in This refers to the increased reactive power capacity that can be converted to the high-voltage side busbar for each 500kV power plant. This refers to the reduction in reactive power capacity that can be converted to the high-voltage side busbar for each 500kV power plant.

[0052] Optionally, when the aforementioned reactive power regulation equipment is a low-voltage capacitor and reactor within the first substation corresponding to the first voltage level, such as a low-voltage capacitor and reactor within a 500kV substation, the aforementioned voltage sensitivity is used to indicate the impact of the switching of reactive power equipment (i.e., the aforementioned low-voltage capacitor and reactor) on the central bus voltage of the 500kV substation's main transformer low-voltage side. This can be simplified to calculating the voltage sensitivity S2 of the reactive power injection from the 500kV substation's main transformer low-voltage side bus to the central bus. The sensitivity matrix can be obtained using the quasi-steady-state reactive power voltage sensitivity calculation method, as shown in the following formula:

[0053]

[0054] Where S2 is the sensitivity matrix, and since the 500kV system forms a loop, S is a full matrix; k is the number of low-voltage side buses in all 500kV substations of the power grid, m is the number of central buses included in the evaluation model, and S... ji Let be the sensitivity of the reactive power center of the low-voltage side bus of the i-th 500kV substation to the voltage of the j-th bus.

[0055] The further obtained index of the reactive power upward regulation capability of the 500kV substation to the central bus voltage (i.e., the above-mentioned second voltage upward regulation capability) is as follows:

[0056]

[0057] The further obtained index of the 500kV substation's reactive power regulation capability to the central bus voltage (i.e., the aforementioned second voltage downward regulation capability) is as follows:

[0058]

[0059] in, This refers to the additional reactive power capacity corresponding to the currently connected capacitors or disconnected reactors on the low-voltage side bus of each 500kV substation. This refers to the reactive power reduction corresponding to the current input reactors or disconnected capacitors on the low-voltage side bus of each 500kV substation.

[0060] Optionally, when the aforementioned reactive power regulation equipment is low-voltage capacitors and reactors in the second substation corresponding to the third voltage level, such as low-voltage capacitors and reactors in a 1000kV substation, the aforementioned voltage sensitivity is used to indicate the impact of the switching of the reactive power regulation equipment (i.e., the aforementioned low-voltage capacitors and reactors) on the central bus voltage of the 1000kV substation's main transformer low-voltage side. This can be simplified to calculating the voltage sensitivity S3 of the reactive power injection from the 1000kV substation's main transformer low-voltage side bus on the central bus. The sensitivity matrix can be obtained using the quasi-steady-state reactive power voltage sensitivity calculation method, as shown in the following formula:

[0061]

[0062] Where S3 is the sensitivity matrix, l is the number of low-voltage side buses in all 1000kV substations of the power grid, m is the number of central buses included in the evaluation model, and S ji Let be the sensitivity of reactive power injection on the low-voltage side bus of the i-th 1000kV substation to the voltage of the j-th central bus.

[0063] The further obtained index of the reactive power regulation capability of a 1000kV substation to the central bus voltage is:

[0064]

[0065] The further obtained index of the reactive power regulation capability of a 1000kV substation to the central bus voltage is:

[0066]

[0067] in, The reactive power capacity that can be increased by currently connecting or disconnecting capacitors and reactors on the low-voltage side bus of each 1000kV substation. This refers to the reactive power reduction corresponding to the current input reactors or disconnected capacitors on the low-voltage side bus of each 1000kV substation.

[0068] Optionally, when the aforementioned reactive power regulation equipment is a generator of the second power plant corresponding to the second voltage level, such as a generator of a 220kV power plant, the aforementioned voltage sensitivity is used to indicate the impact of the switching of the reactive power regulation equipment (i.e., the aforementioned low-voltage capacitors and reactors) on the central bus voltage of the 220kV substation main transformer low-voltage side. This can be simplified to calculating the voltage sensitivity S4 of the reactive power injection from the 220kV substation main transformer low-voltage side bus on the central bus. The sensitivity matrix can be obtained using the quasi-steady-state reactive power voltage sensitivity calculation method, as shown in the following formula:

[0069]

[0070] Where S4 is the sensitivity matrix, h is the total number of 220kV power plants in the power grid, m is the number of central buses included in the evaluation model, and S ji This refers to the sensitivity of the reactive power injection of the i-th 220kV power plant to the voltage of the j-th central bus.

[0071] Further, the upward regulation capability of the reactive power of the 220kV power plant to the central bus voltage (i.e., the aforementioned second voltage upward regulation capability) is obtained as follows:

[0072]

[0073] Further, the downward regulation capability of the reactive power of the 220kV power plant to the central bus voltage (i.e., the aforementioned second voltage downward regulation capability) is obtained as follows:

[0074]

[0075] in, This refers to the increased reactive power capacity that can be converted to the high-voltage side busbar for each 220kV power plant. This refers to the reduction in reactive power capacity that can be converted to the high-voltage side busbar for each 220kV power plant.

[0076] Optionally, the first voltage upward adjustment capability is calculated based on the voltage upper limit, voltage lower limit, and second voltage upward adjustment capability corresponding to the above-mentioned multiple evaluation parameters.

[0077] Optionally, the first voltage downward adjustment capability is calculated based on the voltage upper limit, voltage lower limit, and second voltage downward adjustment capability corresponding to the above-mentioned multiple evaluation parameters.

[0078] As an optional embodiment, an object model for voltage regulation capability assessment is established, including a 500kV substation B1 (i.e., 500kV) and a 1000kV substation B2, a 500kV power plant D1 and a 220kV power plant D2. The high-voltage busbar of substation B1 is designated as the central busbar b1 of the assessment object model. The current voltage value of busbar b1 of substation B1 is set to V1 = 510.38kV, and the upper voltage limit is V1. max =515kV, lower voltage limit is V1 min =503kV, the reactive power capacity that can be increased by connecting or disconnecting capacitors and reactors on the low-voltage side bus of the substation is: The reactive power reduction corresponding to the current installed reactors or disconnected capacitors on the low-voltage side bus of the substation is: Quasi-steady-state sensitivity (i.e., the sensitivity matrix corresponding to the voltage sensitivity mentioned above) S1 = 0.0176; Set the reactive power capacity corresponding to the currently connected capacitors or disconnected reactors on the low-voltage side bus of substation B2. The reduced reactive power capacity corresponding to the current installed reactors or disconnected capacitors on the low-voltage side bus of the substation. Quasi-steady-state sensitivity S2 = 0.017; the increase in reactive power capacity that can be calculated from the power plant's D1 to the high-voltage side bus is set to... The reduced reactive power capacity when converted to the high-voltage side bus is Quasi-steady-state sensitivity S3 = 0.0135; the increase in reactive power capacity that can be calculated from the power plant's D2 to the high-voltage side bus is set to... The reduced reactive power capacity when converted to the high-voltage side bus is Quasi-steady-state sensitivity S4 = 0.0143; the reactive power regulation capability indicators of each substation and power plant on the central bus voltage are as follows:

[0079] For substation B1, its reactive power regulation capability to the central bus voltage is: Downward adjustment capability index For substation B2, its reactive power regulation capability to the central bus voltage is: Downward adjustment capability index For substation D1, its reactive power's ability to adjust the voltage of the central bus is as follows: Downward adjustment capability index For substation D2, its reactive power's ability to adjust the voltage of the central bus is as follows: Downward adjustment capability index Further calculation of the voltage regulation capability index of the central bus: Voltage upward regulation capability index of central bus b1 Voltage downward regulation capability index of central bus b1

[0080] It should be noted that the embodiments of the present invention provide a reference for setting operating parameters, optimizing control strategies, and configuring compensation capacity of actual systems by comprehensively evaluating the reactive power control effect of the system. It also provides data support for comprehensively evaluating the voltage and reactive power operation status and tracking the causes of unreasonable operation status. In addition, the embodiments of the present invention can provide dispatchers with a quantitative evaluation basis for the health status of the power grid operation internally, and can serve as a publicity window to showcase the operation of power grid dispatching externally.

[0081] In one optional embodiment, obtaining multiple busbars corresponding to the power grid in the target area includes:

[0082] Establish an object model corresponding to the power grid in the target area;

[0083] Based on the above object model, the above-mentioned multiple busbars corresponding to the power grid in the target area are determined.

[0084] Optionally, an object model corresponding to the target area power grid can be established based on the object of the regional voltage regulation capability assessment. For example, if the 500kV bus and the 220kV bus at the same station in the target area power grid are used as the assessment objects to establish the above object model, then the above multiple bus shall include at least: the central bus, the 500kV bus and the 220kV bus.

[0085] In an optional embodiment, the above method further includes:

[0086] Obtain the voltage amplitude adjustment parameters corresponding to the aforementioned central bus;

[0087] Based on the above voltage amplitude adjustment parameters, the steady-state adjustable voltage amplitude corresponding to the above central bus is calculated. The above steady-state adjustable voltage amplitude includes at least: the steady-state adjustable voltage margin of the above central bus and the steady-state adjustable voltage margin.

[0088] Optionally, the voltage amplitude adjustment parameters mentioned above may include at least: the current reactive power value of the generator unit corresponding to the central bus, the maximum reactive power value of the generator unit corresponding to the central bus, the total capacity of the capacitors that can be put into operation and the reactors that can be disconnected corresponding to the central bus, the total adjustable taps of the transformer taps corresponding to the step-up end of the central bus, and the upper and lower voltage limits of the central bus.

[0089] It should be noted that the steady-state adjustable voltage amplitude, as an important indicator of the adjustable voltage of the regional bus, reflects the degree of voltage adjustability and reactive power voltage support capacity within the region. A larger value indicates sufficient reactive power, a high degree of voltage adjustability, and a stronger ability to maintain voltage stability; conversely, a smaller value indicates a weaker ability to maintain voltage stability.

[0090] Optionally, the steady-state adjustable voltage margin of the aforementioned central bus can be calculated using the following formula:

[0091]

[0092] Where m, n, and k are respectively the number of generators, capacitors / reactors, and main transformer taps that have coupling sensitivity with the calculation bus. The main transformer taps mentioned above are main transformer taps controlled by automatic voltage AVC control. These are the sensitivity of the generator sets, capacitors / reactors, and main transformer tap changers to the reactive power or tap position of the aforementioned central bus to the bus voltage. The current reactive power value and maximum reactive power value of the generator units corresponding to the aforementioned central busbars are respectively; This refers to the total capacity of currently operational capacitors and disconnectable reactors. This refers to the adjustable tap position of the transformer tap corresponding to the step-up end of the central busbar, used to account for factors such as parallel connection and tap slippage of the main transformer; V up V dn These are the upper and lower voltage limits for the central bus, respectively.

[0093] Optionally, the steady-state adjustable voltage margin of the aforementioned central bus can be calculated using the following formula:

[0094]

[0095] in, These are the current reactive power value and minimum reactive power value of the generator unit corresponding to the aforementioned central bus; This represents the total capacity of currently disconnectable capacitors and inductable reactors. This refers to the adjustable tap position of the transformer tap corresponding to the step-up end of the central busbar, used to account for factors such as parallel connection and tap slippage of the main transformer; V up V dn These are the upper and lower voltage limits for the central bus, respectively.

[0096] This embodiment also provides a voltage regulation capability evaluation device, which is used to implement the above embodiments and preferred embodiments, and will not be repeated as already described. As used below, the terms "module" and "device" can refer to a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0097] According to an embodiment of the present invention, an apparatus embodiment for implementing the above-described voltage regulation capability evaluation method is also provided. Figure 2 This is a schematic diagram of the structure of a voltage regulation capability evaluation device according to an embodiment of the present invention, as shown below. Figure 2 As shown, the voltage regulation capability evaluation device includes: an acquisition module 200, a first determination module 202, and a second determination module 204, wherein:

[0098] The aforementioned acquisition module 200 is used to acquire multiple busbars corresponding to the power grid in the target area, wherein the multiple busbars include at least: a central busbar;

[0099] The first determining module 202 is connected to the acquisition module 200 and is used to determine multiple evaluation parameters corresponding to multiple reactive power regulation devices in the target area power grid. The multiple evaluation parameters include at least: reactive power capacity can be increased, reactive power capacity can be reduced, and voltage sensitivity.

[0100] The second determining module 204 is connected to the first determining module 202 and is used to determine the voltage regulation capability assessment result of the central bus based on the multiple assessment parameters.

[0101] It should be noted that the above modules can be implemented by software or hardware. For example, for the latter, it can be implemented in the following ways: the above modules can be located in the same processor; or the above modules can be located in different processors in any combination.

[0102] It should be noted that the aforementioned acquisition module 200, first determination module 202, and second determination module 204 correspond to steps S102 to S106 in the embodiments. The instances and application scenarios implemented by the above modules and their corresponding steps are the same, but are not limited to the content disclosed in the above embodiments. It should also be noted that the above modules, as part of the device, can run on a computer terminal.

[0103] It should be noted that the optional or preferred implementation methods of this embodiment can be found in the relevant descriptions in the embodiments, and will not be repeated here.

[0104] The voltage regulation capability evaluation device described above may also include a processor and a memory. The acquisition module 200, the first determination module 202, the second determination module 204, etc., are all stored in the memory as program units, and the processor executes the program units stored in the memory to realize the corresponding functions.

[0105] The processor contains a core that retrieves corresponding program units from memory. One or more cores may be configured. Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory includes at least one memory chip.

[0106] According to an embodiment of this application, an embodiment of a non-volatile storage medium is also provided. Optionally, in this embodiment, the non-volatile storage medium includes a stored program, wherein, when the program runs, it controls the device containing the non-volatile storage medium to execute any of the voltage regulation capability evaluation methods.

[0107] Optionally, in this embodiment, the non-volatile storage medium may be located in any computer terminal in a group of computer terminals in a computer network, or in any mobile terminal in a group of mobile terminals, and the non-volatile storage medium includes stored programs.

[0108] Optionally, during program execution, the device containing the non-volatile storage medium may be controlled to perform the following functions: obtain the upper voltage limit and lower voltage limit of the aforementioned central bus; and calculate the voltage regulation capability evaluation result based on the aforementioned upper voltage limit, the aforementioned lower voltage limit, and the aforementioned multiple evaluation parameters.

[0109] Optionally, during program execution, the device containing the non-volatile storage medium is controlled to perform the following functions: based on the aforementioned evaluation parameters corresponding to the aforementioned multiple reactive power regulation devices, the second voltage upward regulation capability and the second voltage downward regulation capability corresponding to the aforementioned multiple reactive power regulation devices are calculated; based on the aforementioned upper voltage limit, the aforementioned lower voltage limit, and the aforementioned second voltage upward regulation capability, the first voltage upward regulation capability is calculated; based on the aforementioned upper voltage limit, the aforementioned lower voltage limit, and the aforementioned second voltage downward regulation capability, the first voltage downward regulation capability is calculated.

[0110] Optionally, during program execution, the device containing the non-volatile storage medium may be controlled to perform the following functions: establish an object model corresponding to the target area power grid; and based on the object model, determine the multiple buses corresponding to the target area power grid.

[0111] Optionally, during program execution, the device containing the non-volatile storage medium is controlled to perform the following functions: the aforementioned plurality of reactive power regulating devices include at least: the generator of the first power plant corresponding to the first voltage level, the low-voltage capacitor and reactor in the first substation; and the generator of the second power plant corresponding to the second voltage level, the low-voltage capacitor and reactor in the second substation.

[0112] Optionally, during program execution, the device containing the non-volatile storage medium is controlled to perform the following functions: obtain the voltage amplitude adjustment parameters corresponding to the aforementioned central bus; and calculate the steady-state adjustable voltage amplitude corresponding to the aforementioned central bus based on the aforementioned voltage amplitude adjustment parameters, wherein the aforementioned steady-state adjustable voltage amplitude includes at least: the steady-state adjustable voltage margin of the aforementioned central bus and the steady-state adjustable voltage margin.

[0113] According to an embodiment of this application, an embodiment of a processor is also provided. Optionally, in this embodiment, the processor is used to run a program, wherein the program executes any of the voltage regulation capability evaluation methods described above.

[0114] According to an embodiment of this application, an embodiment of a computer program product is also provided, which, when executed on a data processing device, is adapted to execute a program that initializes the evaluation method steps for voltage regulation capability having any of the above-described characteristics.

[0115] Optionally, when the aforementioned computer program product is executed on a data processing device, it is suitable to execute an initialization program with the following method steps: obtaining multiple buses corresponding to the target area power grid, wherein the multiple buses include at least a central bus; determining multiple evaluation parameters corresponding to multiple reactive power regulation devices in the target area power grid, wherein the multiple evaluation parameters include at least: reactive power capacity can be increased, reactive power capacity can be reduced, and voltage sensitivity; and determining the voltage regulation capability evaluation result of the central bus based on the multiple evaluation parameters.

[0116] According to an embodiment of this application, an embodiment of an electronic device is also provided, such as... Figure 3 As shown, the electronic device 10 includes a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, it performs the following steps: acquiring multiple buses corresponding to the target area power grid, wherein the multiple buses include at least a central bus; determining multiple evaluation parameters corresponding to multiple reactive power regulation devices in the target area power grid, wherein the multiple evaluation parameters include at least: reactive power capacity can be increased, reactive power capacity can be reduced, and voltage sensitivity; and determining the voltage regulation capability evaluation result of the central bus based on the multiple evaluation parameters.

[0117] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0118] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0119] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of modules described above can be a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between modules, and may be electrical or other forms.

[0120] The modules described above as separate components may or may not be physically separate. Similarly, the components shown as modules may or may not be physical modules; they may be located in one place or distributed across multiple modules. Some or all of the modules can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0121] Furthermore, the functional modules in the various embodiments of the present invention can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module. The integrated modules described above can be implemented in hardware or as software functional modules.

[0122] If the aforementioned integrated modules are implemented as software functional modules and sold or used as independent products, they can be stored in a computer-readable non-volatile storage medium. Based on this understanding, the technical solution of this invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a non-volatile storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned non-volatile storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0123] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for evaluating voltage regulation capability, characterized in that, include: Obtain multiple busbars corresponding to the power grid in the target area, wherein the multiple busbars include at least: a central busbar; Determine multiple evaluation parameters corresponding to multiple reactive power regulation devices in the target area power grid, wherein the multiple evaluation parameters include at least: reactive power capacity can be increased, reactive power capacity can be reduced, and voltage sensitivity; Based on the aforementioned evaluation parameters, the voltage regulation capability evaluation result of the central bus is determined; The voltage regulation capability assessment result includes the first voltage upward regulation capability and the first voltage downward regulation capability corresponding to the central bus. Based on the multiple assessment parameters, the voltage regulation capability assessment result of the central bus is determined, including: obtaining the upper voltage limit and the lower voltage limit of the central bus; calculating the voltage regulation capability assessment result based on the upper voltage limit, the lower voltage limit, and the multiple assessment parameters; and calculating the second voltage upward regulation capability and the second voltage downward regulation capability corresponding to the multiple reactive power regulation devices based on the multiple assessment parameters corresponding to the multiple reactive power regulation devices, wherein the second voltage upward regulation capability is calculated by multiplying the increaseable reactive power capacity and the voltage sensitivity, and the second voltage downward regulation capability is calculated by multiplying the decreaseable reactive power capacity and the voltage sensitivity. The multiple reactive power regulation devices include the generator of the first power plant corresponding to the first voltage level, the low-voltage capacitors and reactors in the first substation corresponding to the first voltage level, the low-voltage capacitors and reactors in the second substation corresponding to the third voltage level, and the generator of the second power plant corresponding to the second voltage level. Based on the upper voltage limit, the lower voltage limit, and the second voltage upward adjustment capability, the first voltage upward adjustment capability is obtained as follows: Wherein, ΔU1 up ΔU2 represents the second voltage upward regulation capability corresponding to the generator of the first power plant. up ΔU3 represents the second voltage upward regulation capability corresponding to the low-voltage capacitors and reactors in the first substation. up This indicates the upward voltage regulation capability of the low-voltage capacitors and reactors in the second substation, ΔU4. up V represents the second voltage upward regulation capability corresponding to the generator of the second power plant. up V represents the upper limit value of the voltage. dn This indicates the lower limit value of the voltage; Based on the upper voltage limit, the lower voltage limit, and the second voltage downward adjustment capability, the first voltage downward adjustment capability is obtained as follows: Wherein, ΔU1 dn ΔU2 represents the downward voltage regulation capability corresponding to the generator of the first power plant. dn ΔU3 represents the downward voltage regulation capability of the low-voltage capacitors and reactors in the first substation. dn ΔU4 represents the downward voltage regulation capability of the low-voltage capacitors and reactors in the second substation. dn This indicates the second voltage downward regulation capability corresponding to the generator of the second power plant.

2. The method according to claim 1, characterized in that, Obtain multiple busbars corresponding to the power grid in the target area, including: Establish an object model corresponding to the power grid in the target area; Based on the object model, the multiple busbars corresponding to the target area power grid are determined.

3. The method according to claim 1, characterized in that, The plurality of busbars also includes: a first busbar corresponding to the first voltage level and a second busbar corresponding to the second voltage level, wherein: The plurality of reactive power regulating devices include at least: a generator of a first power plant corresponding to the first voltage level, low-voltage capacitors and reactors in a first substation corresponding to the first voltage level, a generator of a second power plant corresponding to the second voltage level, and low-voltage capacitors and reactors in a second substation corresponding to the third voltage level.

4. The method according to claim 1, characterized in that, The method further includes: Obtain the voltage amplitude adjustment parameters corresponding to the central bus; Based on the voltage amplitude adjustment parameters, the steady-state adjustable voltage amplitude corresponding to the central bus is calculated, wherein the steady-state adjustable voltage amplitude includes at least: the steady-state adjustable voltage margin of the central bus and the steady-state adjustable voltage margin.

5. A device for evaluating voltage regulation capability, characterized in that, include: The acquisition module is used to acquire multiple busbars corresponding to the power grid in the target area, wherein the multiple busbars include at least: a central busbar; The first determining module is used to determine multiple evaluation parameters corresponding to multiple reactive power regulation devices in the target area power grid, wherein the multiple evaluation parameters include at least: reactive power capacity can be increased, reactive power capacity can be reduced, and voltage sensitivity. The second determining module is used to determine the voltage regulation capability assessment result of the central bus based on the multiple assessment parameters; The second determining module is further configured to: obtain the upper voltage limit and lower voltage limit of the central bus; calculate the voltage regulation capability assessment result based on the upper voltage limit, the lower voltage limit, and the plurality of assessment parameters; and calculate the second voltage upward regulation capability and the second voltage downward regulation capability corresponding to the plurality of reactive power regulation devices based on the plurality of assessment parameters corresponding to the plurality of reactive power regulation devices, wherein the second voltage upward regulation capability is calculated based on the product of the increaseable reactive power capacity and the voltage sensitivity, and the second voltage downward regulation capability is calculated based on the product of the decreaseable reactive power capacity and the voltage sensitivity, and the plurality of reactive power regulation devices include the generator of the first power plant corresponding to the first voltage level, the low-voltage capacitors and reactors in the first substation corresponding to the first voltage level, the low-voltage capacitors and reactors in the second substation corresponding to the third voltage level, and the generator of the second power plant corresponding to the second voltage level; The second determining module is further configured to: determine the first voltage upward adjustment capability based on the upper voltage limit, the lower voltage limit, and the second voltage upward adjustment capability. Wherein, ΔU1 up ΔU2 represents the second voltage upward regulation capability corresponding to the generator of the first power plant. up ΔU3 represents the second voltage upward regulation capability corresponding to the low-voltage capacitors and reactors in the first substation. up This indicates the upward voltage regulation capability of the low-voltage capacitors and reactors in the second substation, ΔU4. up V represents the second voltage upward regulation capability corresponding to the generator of the second power plant. up V represents the upper limit value of the voltage. dn This indicates the lower limit value of the voltage; The second determining module is further configured to: determine the first voltage downward adjustment capability based on the upper voltage limit, the lower voltage limit, and the second voltage downward adjustment capability. Wherein, ΔU1 dn ΔU2 represents the downward voltage regulation capability corresponding to the generator of the first power plant. dn ΔU3 represents the downward voltage regulation capability of the low-voltage capacitors and reactors in the first substation. dn ΔU4 represents the downward voltage regulation capability of the low-voltage capacitors and reactors in the second substation. dn This indicates the second voltage downward regulation capability corresponding to the generator of the second power plant.

6. A non-volatile storage medium, characterized in that, The non-volatile storage medium stores multiple instructions adapted for loading and execution by a processor of the voltage regulation capability evaluation method according to any one of claims 1 to 4.

7. An electronic device comprising a memory and a processor, characterized in that, The memory stores a computer program, and the processor is configured to run the computer program to perform the voltage regulation capability evaluation method according to any one of claims 1 to 4.

8. A processor, characterized in that, The processor is used to run a program, wherein the program executes the voltage regulation capability evaluation method according to any one of claims 1 to 4.

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