A PSASP-based fast switch setting calculation method and system

Abstract

The present invention discloses a PSASP-based rapid switch setting calculation method and system. The method includes: determining the maximum operating mode under the current power grid structure and setting different fault locations under the maximum operating mode; calculating the fault current values ​​of all 220kV branches of the station under all set fault locations; setting various current collection schemes according to the power grid topology, obtaining the collected current values ​​when a short-circuit current exceeds the standard fault occurs in the station in each current collection scheme, and calculating the overcurrent setting value based on the collected current values ​​using a preset margin coefficient; determining the operating fault range of each current collection scheme based on each overcurrent setting using a preset setting rule; selecting the minimum operating fault range within each operating fault range, and using the overcurrent setting value in the current collection scheme corresponding to the minimum operating fault range as the final rapid switch setting value. The method is suitable for setting calculations under all rapid switch installation schemes and has strong applicability.

Description

Technical Field

[0001] The present invention belongs to the technical field of flexible short-circuit current suppression, and in particular relates to a PSASP-based fast switch constant value setting calculation method and system. Background Art

[0002] Excessive short-circuit currents have become a major constraint on the development and safe operation of power grids. As a new flexible short-circuit current suppression technology, the fast switch closes during normal operation without impacting the system. In the event of a short-circuit fault, the fast switch is controlled by a protective device that reliably opens before a conventional circuit breaker opens, cutting off the branch fault current and reducing the short-circuit current.

[0003] To ensure accurate and reliable operation of fast-acting switches after a fault, proper setting of fixed values ​​is crucial. This is the core element in ensuring their correct operation. The basic principle of fast-acting switches is to install them at busbars, sections, or lines. By dynamically changing the system topology during a fault, they reduce the short-circuit current level interrupted by the circuit breaker and minimize the impact on normal system operation.

[0004] Fast-acting switches are a new type of flexible short-circuit current suppression technology, primarily designed to reduce short-circuit current levels. However, there are currently no unified implementation regulations or standard calculation methods for setting the setpoint. Current fast-acting switch setting methods are estimated based on short-circuit current exceeding limits and daily operating experience. These methods are primarily designed for fast-acting switches installed on 220kV busbars / sectioning switches and 500kV outgoing lines. Their applicability to 220kV line-side installations is uncertain, and their applicability is limited. Summary of the Invention

[0005] The present invention provides a PSASP-based fast switch setting calculation method and system, which are used to solve the technical problems that there is no unified relevant standard for the setting of fast switches and the setting setting method of existing relay protection is not applicable.

[0006] In a first aspect, the present invention provides a PSASP-based fast switch setting calculation method, comprising:

[0007] Determine the maximum operating mode under the current power grid structure, and set different fault locations under the maximum operating mode, wherein the fault locations include the bus fault location of the station and the 220kV bus fault locations of all adjacent plants and stations directly connected to the station;

[0008] Calculate the fault current values ​​of all 220kV branches of the station under all set fault locations. The fault current values ​​include the magnitude and direction of the fault current, where the direction of the fault current flowing into the 220kV busbar of the station is considered the positive direction.

[0009] Setting various current collection schemes according to the grid topology, obtaining the collected current values ​​when a short-circuit current exceeding the standard fault occurs at the station in each current collection scheme, and calculating the overcurrent constant value using a preset margin coefficient based on the collected current values;

[0010] Based on each overcurrent setting value, the preset setting rules are used to determine the operating fault range of each current acquisition scheme, wherein the operating fault range is the proportion of the fault current calculated from the 220kV side of the station to the fault range reaching the opposite side of the line;

[0011] A minimum action fault range is selected from each action fault range, and the overcurrent setting in the current acquisition scheme corresponding to the minimum action fault range is used as the final fast switch setting.

[0012] In a second aspect, the present invention provides a PSASP-based rapid switch setting calculation system, comprising:

[0013] A first setting module is configured to determine a maximum operating mode under the current power grid structure and set different fault locations under the maximum operating mode, wherein the fault locations include the bus fault location of the local station and the 220 kV bus fault locations of all adjacent plants directly connected to the local station;

[0014] a calculation module configured to calculate the fault current values ​​of all 220 kV branches of the station under all set fault locations, wherein the fault current values ​​include the magnitude and direction of the fault current, wherein the direction of the fault current flowing into the 220 kV busbar of the station is considered to be a positive direction;

[0015] a second setting module configured to set various current collection schemes according to the topology of the power grid, obtain the collected current values ​​when a short-circuit current exceeding the standard fault occurs at the local station in each current collection scheme, and calculate the overcurrent constant value based on the collected current values ​​using a preset margin coefficient;

[0016] a determination module configured to determine, based on each overcurrent setting value, an operating fault range of each current acquisition scheme using a preset setting rule, wherein the operating fault range is the proportion of the fault current reaching the opposite side of the line when the fault current is calculated from the 220 kV side of the local station;

[0017] The setting module is configured to select a minimum action fault range from each action fault range, and use the overcurrent setting in the acquisition current scheme corresponding to the minimum action fault range as the final fast switch setting.

[0018] In a third aspect, an electronic device is provided, comprising: at least one processor, and a memory communicatively connected to the at least one processor, wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the steps of the PSASP-based fast switch constant setting calculation method of any embodiment of the present invention.

[0019] In a fourth aspect, the present invention further provides a computer-readable storage medium having a computer program stored thereon. When the program instructions are executed by a processor, the processor executes the steps of the PSASP-based fast switch constant setting calculation method of any embodiment of the present invention.

[0020] The PSASP-based fast switch setting calculation method and system of the present application are based on the measured model data of the power grid, and calculate the branch current when a fault occurs at this station and all nearby power stations through PSASP software. According to the setting principle of "ensuring that the fast switch operates sensitively when a short-circuit current exceeds the standard at this station, and the fault current reaches the overcurrent set value; the fast switch does not operate when faults occur in other power stations, and the fault current is lower than the overcurrent set value", the set value selection and action fault range of different branch current collection schemes of the control device are analyzed and compared, the collection current scheme with the smallest action fault range is selected, and the overcurrent set value is finally determined. The method and system are suitable for the set value setting calculation under all fast switch installation schemes, have strong applicability, and use the short-circuit current calculation results under the measured model of the power grid for setting. The data source is accurate, the analysis method is scientific, and the conclusion is highly credible. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] Figure 1 A flowchart of a PSASP-based fast switch setting calculation method provided in one embodiment of the present invention;

[0023] Figure 2 A diagram of a station A and a near-area network topology structure is provided for an embodiment of the present invention;

[0024] Figure 3 Another A station and near-area network topology diagram of a specific embodiment is provided for an embodiment of the present invention;

[0025] Figure 4A schematic diagram of the fault range of the outgoing line of station A during the rapid switching action of a specific embodiment of the present invention is provided;

[0026] Figure 5 A structural block diagram of a PSASP-based fast switch setting calculation system provided in one embodiment of the present invention;

[0027] Figure 6 It is a structural diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] See also Figure 1 , which shows a flow chart of a fast switch setting value calculation method based on PSASP of the present application.

[0030] like Figure 1 As shown in the figure, the PSASP-based fast switch setting value calculation method includes:

[0031] Step S101, determine the maximum operating mode under the current power grid, and set different fault locations under the maximum operating mode, the fault locations including the bus fault location of the station and all 220kV bus fault locations of adjacent plants directly connected to the station.

[0032] In this step, the measured data of the power grid are obtained from the preset PSASP simulation software database. The measured data of the power grid include line parameters, main transformer parameters, generator parameters and power grid topology information; the maximum operating mode under the current power grid structure is selected based on the measured data of the power grid.

[0033] Step S102, calculating the fault current values ​​of all 220kV branches of the station under all set fault locations, wherein the fault current value includes the magnitude and direction of the fault current, wherein the direction flowing into the 220kV busbar of the station is considered the positive direction.

[0034] In this step, the branch current value is calculated using the PSASP simulation software. The calculation adopts the national short-circuit calculation standard conditions, a voltage coefficient of 1.1, and a load motor ratio of 30%. Different fault locations can be set in the software. The software directly calculates the branch current value based on the actual measured data of the power grid.

[0035] Step S103, setting various current collection schemes according to the grid topology, and obtaining the collected current values ​​when a short-circuit current exceeding the standard fault occurs at the station in the various current collection schemes, and calculating the overcurrent constant value based on the collected current values ​​using a preset margin coefficient.

[0036] In this step, the types of current collection schemes specifically include: fast switch installation line, fast switch installation line + 1 main transformer, the sum of 2 main transformers, and fast switch installation line + 1 220kV line branch.

[0037] It should be noted that the overcurrent setting is equal to the current collected when a short-circuit current exceeds the specified limit at this station / margin factor K. The K value is determined by combining the control device algorithm and operating experience, and is generally between 1.5 and 2.

[0038] Step S104: Based on each overcurrent setting value, a preset setting rule is used to determine the action fault range of each current acquisition scheme, wherein the action fault range is the proportion of the fault current calculated from the 220kV side of the station to the fault range reaching the opposite side of the line.

[0039] In this step, according to the setting principle of "ensuring that the fast switch operates sensitively when a short-circuit current exceeds the standard fault at this station and the fault current reaches the overcurrent set value; the fast switch does not operate when faults occur at other plants and stations and the fault current is lower than the overcurrent set value", the operation of the fast switch under each current collection scheme is analyzed in detail.

[0040] The specific analysis includes: when a fault occurs in the 220kV busbar of this station, whether the collected current value is greater than the overcurrent setting Z to ensure that the fast switch can operate sensitively; when a fault occurs in the adjacent plant station, whether the collected current value is less than the overcurrent setting Z to ensure that the fast switch does not operate incorrectly.

[0041] Step S105 : selecting a minimum action fault range from among various action fault ranges, and using the overcurrent setting in the current acquisition scheme corresponding to the minimum action fault range as the final fast switch setting.

[0042] In this step, the operating fault ranges of the fast switch under different current collection schemes are compared, that is, the proportion of the fault current calculated from the 220kV side of the station to the fault range reaching the opposite side of the line. The current collection scheme with the smallest operating fault range is selected as the optimal scheme.

[0043] Outputs the final overcurrent setting Z and the corresponding current acquisition plan, as well as the fault range results for the rapid switch operation of all 220kV branches in the station. Applying the overcurrent setting Z to the rapid switch control device ensures that when a short-circuit fault occurs in the power grid, the rapid switch can accurately and reliably operate according to the preset setting, effectively suppressing the short-circuit current level and ensuring the safe and stable operation of the power grid.

[0044] In summary, the method of the present application is based on the measured model data of the power grid, and calculates the branch current when a fault occurs at this station and all nearby power stations through the PSASP software. According to the setting principle of "ensuring that the fast switch operates sensitively when a short-circuit current exceeds the standard at this station, and the fault current reaches the overcurrent set value; the fast switch does not operate when faults occur in other power stations, and the fault current is lower than the overcurrent set value", the set value selection and action fault range of different branch current acquisition schemes of the control device are analyzed and compared, the current acquisition scheme with the smallest action fault range is selected, and the overcurrent set value is finally determined. It is suitable for the set value setting calculation under all installation schemes of the fast switch, has strong applicability, and uses the short-circuit current calculation results under the measured model of the power grid for adjustment. The data source is accurate, the analysis method is scientific, and the conclusion is highly credible.

[0045] In a specific embodiment, a 500kV substation A is selected. All 220kV branches of station A include two main transformer branches and i 220kV line branches. Plant 1 to plant i are 220kV plants directly connected to station A. Plant (i+1) to plant j are 220kV plants that are electrically close to station A and have a greater impact on station A after a fault. The grid topology structure is shown in the figure below. Figure 2 shown.

[0046] Assume that the 220 kV short-circuit current at station A exceeds the standard. To control the short-circuit current level, a fast switch is installed on the 220 kV line 1 at station A. The technical solution of the present invention is: a fast switch setting calculation method based on PSASP, comprising the following steps:

[0047] (1) Obtain the measured data of the power grid (lines, main transformers, generators, etc.) from the PSASP simulation software database and select a maximum operating mode under the current grid structure;

[0048] (2) Start the short-circuit current calculation module of the PSASP simulation software and set different fault locations under the selected maximum operating mode, mainly including the busbar fault of this station (220kV, 500kV) and the 220kV busbar fault of the connected power station. Calculate the current of all 220kV branches of station A under all fault locations. See Table 1 for details.

[0049] Table 1 Branch current of station A at different fault locations

[0050] ,

[0051] (3) Considering the polarity of branch current (current flowing into the 220kV busbar of station A is positive), the control device collects different branch current schemes based on the branch current calculation results obtained in Table 1. The current collection schemes include four types: "fast switch installation line", "fast switch installation line + 1 main transformer", "sum of 2 main transformers", and "fast switch installation line + 1 220kV line branch". A fixed value Z is set for each current collection scheme. The fixed value Z = the collected current under the short-circuit current exceeding the standard fault of this station / margin factor K. The margin factor K is determined by combining the control device algorithm and operating experience, and is generally 1.5-2, as shown in Table 2.

[0052] Table 2 Current acquisition schemes at different fault locations

[0053] ,

[0054] (4) The setting principle of the fast switch is: "to ensure that the fast switch will act sensitively when a short-circuit current exceeds the limit at this station, and the fault current reaches the overcurrent set value; the fast switch will not act when a fault occurs at other stations, and the fault current is lower than the overcurrent set value." This setting principle is explained using the "Current Collection Scheme: Line 1" as an example to ensure that when a 220kV busbar fault occurs at Station A, , the fast switch acts sensitively; when other plants fail, the fast switch does not act, that is, 、 、…、 <Z. The plant operation conditions that cause rapid switching actions under different acquisition current schemes are analyzed and compared, and the acquisition current scheme with the smallest action fault range is selected to obtain the final set value.

[0055] Taking the "Current Collection Scheme: Line 1 + Main Transformer Branch 1" as an example, the set value is ,The fault range of fast switch action of all 220kV branches of station A is shown in Table 3.

[0056] Table 3 Outgoing line fault range of station A with fast switching action

[0057] ,

[0058] It should be noted that the fault range is calculated starting from the 220kV side of station A, and the fault range will be 100% when it reaches the opposite side of the line.

[0059] In this embodiment, based on the measured operation data of the power grid, the branch current when a fault occurs at this station and all nearby power stations is calculated, and the margin coefficient K is introduced to determine the fixed value. According to the setting principle of "the fast switch operates sensitively when a fault occurs at this station, and the fast switch does not operate when faults occur at other power stations", a variety of current collection schemes are compared and analyzed, and the fixed value is finally determined, which improves the accuracy and scientificity of the fixed value setting, makes the fast switch protection setting more reasonable and effective, and is applicable to all fast switch installation schemes, bringing great convenience to the fixed value setting of the fast switch.

[0060] Based on the measured data of a certain power grid, we have conducted an analysis and demonstration, and adopted the PSASP simulation software to select a maximum operating mode under the current grid structure of a certain power grid. Under this mode, the 220 kV short-circuit current of Station A is 58.09 kA, which exceeds the rated capacity of the circuit breaker of 50 kA. Station A contains 2 main transformer branches and 10 220 kV line branches, of which Line 2, Line 3, Line 4, Line 5, Line 6, Line 7, Line 8, Line 9, Line 10, and Line 11 are double-circuit lines (with the same length and model). Line Station 1 to Station 6 are 220 kV stations directly connected to Station A, and Station 7 to Station 9 are 220 kV stations with a relatively close electrical distance to Station A and have a greater impact on Station A after a fault. A fast switch is installed on Line 1. The grid topology structure is shown in the figure below. Figure 3 shown.

[0061] Start the short-circuit current calculation module of the PSASP simulation software and calculate the 220kV branch current of station A at all fault locations based on the maximum operation mode, while taking into account the polarity of the branch current (the current flowing into the 220kV busbar of station A is positive), see Table 4 for details.

[0062] Table 4 Branch current of station A at different fault locations

[0063] ,

[0064] The control device collects different branch current schemes. Under each current collection scheme, an overcurrent constant Z is set. The overcurrent constant Z = the collected current under the short-circuit current exceeding the standard fault at this station / margin coefficient K. The margin coefficient K is determined to be 1.5 based on the control device algorithm and operating experience, as shown in Table 5.

[0065] Table 5 Current collection schemes at different fault locations

[0066] ,

[0067] The analysis and comparison of the plant and substation operation conditions that caused the fast switch operation under different current acquisition schemes revealed that the operation fault range was the smallest under the "Line 1 + #1 main transformer" current acquisition scheme. The fast switch operated only when a fault occurred on the 220kV side of Station A, and did not operate for other plant and substation faults. The fixed value under this scheme was 15.91. The fault range of the fast switch operation for all 220kV branches of Station A is shown in Table 6 and Figure 4 As shown:

[0068] Table 6 Outgoing line fault range of station A with fast switching action

[0069] .

[0070] See also Figure 5 , which shows a structural block diagram of a fast switch setting value setting calculation system based on PSASP of the present application.

[0071] like Figure 5 As shown, the fast switch setting value setting calculation system 200 includes a first setting module 210 , a calculation module 220 , a second setting module 230 , a determination module 240 and a setting module 250 .

[0072] Among them, the first setting module 210 is configured to determine the maximum operating mode under the current power grid, and set different fault locations under the maximum operating mode, wherein the fault location includes the bus fault location of the station and the 220kV bus fault location of all adjacent plants directly connected to the station; the calculation module 220 is configured to calculate the fault current value of all 220kV branches of the station under all set fault locations, wherein the fault current value includes the magnitude and direction of the fault current, wherein the direction flowing into the 220kV bus of the station is the positive direction; the second setting module 230 is configured to set various current acquisition schemes according to the power grid topology, and obtain the various current acquisition schemes. The current value collected in the current scheme when a short-circuit current exceeds the standard fault occurs at this station is calculated based on the collected current value using a preset margin coefficient; the determination module 240 is configured to determine the action fault range of each current collection scheme based on each overcurrent setting using a preset setting rule, wherein the action fault range is the proportion of the fault current calculated from the 220kV side of this station to the fault range reaching the opposite side of the line; the setting module 250 is configured to select the minimum action fault range within each action fault range, and use the overcurrent setting in the current collection scheme corresponding to the minimum action fault range as the final fast switch setting.

[0073] It should be understood that Figure 5 Modules and references documented in Figure 1Therefore, the operations and features described above for the method and the corresponding technical effects also apply to Figure 5 The modules in it will not be described in detail here.

[0074] In other embodiments, embodiments of the present invention further provide a computer-readable storage medium having a computer program stored thereon, wherein when the program instructions are executed by a processor, the processor is caused to execute the PSASP-based fast switch setting calculation method in any of the above method embodiments;

[0075] As an embodiment, the computer-readable storage medium of the present invention stores computer-executable instructions, and the computer-executable instructions are configured as follows:

[0076] Setting different fault locations, including the bus fault location of the station and all 220kV bus fault locations of adjacent plants directly connected to the station;

[0077] Calculate the fault current values ​​of all 220kV branches of the station under all set fault locations. The fault current values ​​include the magnitude and direction of the fault current, where the direction of the fault current flowing into the 220kV busbar of the station is considered the positive direction.

[0078] Setting various current collection schemes according to the grid topology, obtaining the current values ​​collected when a short-circuit current exceeds the standard fault occurs at the station in each current collection scheme, and calculating the overcurrent constant using a preset margin coefficient based on the collected current values;

[0079] Based on each overcurrent setting value, the preset setting rules are used to determine the operating fault range of each current acquisition scheme, wherein the operating fault range is the proportion of the fault current calculated from the 220kV side of the station to the fault range reaching the opposite side of the line;

[0080] A minimum action fault range is selected from each action fault range, and the overcurrent setting in the current acquisition scheme corresponding to the minimum action fault range is used as the final fast switch setting.

[0081] The computer-readable storage medium may include a program storage area and a data storage area. The program storage area may store an operating system and application programs required for at least one function; the data storage area may store data generated based on the use of the PSASP-based rapid switch setting calculation system. Furthermore, the computer-readable storage medium may include high-speed random access memory and may also include storage, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, the computer-readable storage medium may optionally include storage remote from the processor. Such remote storage may be connected to the PSASP-based rapid switch setting calculation system via a network. Examples of such networks include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0082] Figure 6 Schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. Figure 6 As shown, the device includes: a processor 310 and a memory 320. The electronic device may also include: an input device 330 and an output device 340. The processor 310, the memory 320, the input device 330 and the output device 340 may be connected via a bus or other means. Figure 6 The example of a bus connection is used. Memory 320 is the aforementioned computer-readable storage medium. Processor 310 executes the various functional applications and data processing of the server by running the non-volatile software programs, instructions, and modules stored in memory 320, thereby implementing the PSASP-based rapid switch setting calculation method of the aforementioned method embodiment. Input device 330 can receive input digital or character information and generate key signal input related to user settings and function control of the PSASP-based rapid switch setting calculation system. Output device 340 can include a display device such as a display screen.

[0083] The electronic device can execute the method provided by the embodiment of the present invention, and has the functional modules and beneficial effects corresponding to the execution method. For technical details not fully described in this embodiment, please refer to the method provided by the embodiment of the present invention.

[0084] As an embodiment, the electronic device is applied to a PSASP-based fast switch setting calculation system for a client, and includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to:

[0085] Setting different fault locations, including the bus fault location of the station and all 220kV bus fault locations of adjacent plants directly connected to the station;

[0086] Calculate the fault current values ​​of all 220kV branches of the station under all set fault locations. The fault current values ​​include the magnitude and direction of the fault current, where the direction of the fault current flowing into the 220kV busbar of the station is considered the positive direction.

[0087] Setting various current collection schemes according to the grid topology, obtaining the collected current values ​​when a short-circuit current exceeding the standard fault occurs at the station in each current collection scheme, and calculating the overcurrent constant value using a preset margin coefficient based on the collected current values;

[0088] Based on each overcurrent setting value, the preset setting rules are used to determine the operating fault range of each current acquisition scheme, wherein the operating fault range is the proportion of the fault current calculated from the 220kV side of the station to the fault range reaching the opposite side of the line;

[0089] A minimum action fault range is selected from each action fault range, and the overcurrent setting in the current acquisition scheme corresponding to the minimum action fault range is used as the final fast switch setting.

[0090] Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented using software plus a necessary general-purpose hardware platform, or of course, hardware. Based on this understanding, the essence of the above technical solution, or the portion that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, or an optical disk, and includes a number of instructions for causing a computer device (such as a personal computer, server, or network device) to execute the methods of each embodiment or certain portions of the embodiments.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A fast switch setting calculation method based on PSASP, characterized in that: include: Determine the maximum operating mode under the current power grid structure, and set different fault locations under the maximum operating mode, wherein the fault locations include the bus fault location of the station and the 220kV bus fault locations of all adjacent plants and stations directly connected to the station; Calculate the fault current values ​​of all 220kV branches of the station under all set fault locations. The fault current values ​​include the magnitude and direction of the fault current, where the direction of the fault current flowing into the 220kV busbar of the station is considered the positive direction. Set various current collection schemes according to the grid topology, obtain the collected current values ​​when a short-circuit current exceeds the standard fault occurs at the station in each current collection scheme, and calculate the overcurrent constant value based on the collected current values ​​using a preset margin coefficient, wherein the overcurrent constant value = the collected current when the short-circuit current exceeds the standard fault occurs at the station / the margin coefficient K; Based on each overcurrent setting value, a preset setting rule is used to determine the operating fault range of each current collection scheme. The operating fault range is the proportion of the fault current reaching the opposite side of the line, calculated from the 220kV side of the local station. The operating fault range = (collected current under the fault on the 220kV side of the local station - overcurrent setting value) / (collected current under the fault on the 220kV side of the local station - collected current under the fault on the opposite side of the power plant); A minimum action fault range is selected from each action fault range, and the overcurrent setting in the current acquisition scheme corresponding to the minimum action fault range is used as the final fast switch setting.

2. A PSASP-based fast switch setting calculation method according to claim 1, characterized in that: Determining the maximum operating mode under the current power grid structure includes: Obtaining measured power grid data from a preset PSASP simulation software database, wherein the measured power grid data includes line parameters, main transformer parameters, generator parameters, and power grid topology information; The maximum operating mode under the current power grid structure is selected according to the actual measured data of the power grid.

3. A PSASP-based fast switch setting calculation method according to claim 1, characterized in that: The types of current collection schemes specifically include: fast switch installation line, fast switch installation line + 1 main transformer, the sum of 2 main transformers, and fast switch installation line + 1 220kV line branch.

4. A PSASP-based fast switch setting calculation method according to claim 1, characterized in that: The setting rule is: when a short-circuit current exceeding the standard fault occurs at this station, the fast switch will operate sensitively and the fault current will reach the overcurrent set value; when faults occur at other plants and stations, the fast switch will not operate and the fault current will be lower than the overcurrent set value.

5. A fast switch setting calculation system based on PSASP, characterized in that: include: A first setting module is configured to determine a maximum operating mode under the current power grid structure and set different fault locations under the maximum operating mode, wherein the fault locations include the bus fault location of the local station and the 220 kV bus fault locations of all adjacent plants directly connected to the local station; a calculation module configured to calculate the fault current values ​​of all 220 kV branches of the station under all set fault locations, wherein the fault current values ​​include the magnitude and direction of the fault current, wherein the direction of the fault current flowing into the 220 kV busbar of the station is considered to be a positive direction; The second setting module is configured to set various current collection schemes according to the power grid topology, obtain the current values ​​collected when a short-circuit current exceeds the standard fault occurs at the local station in each current collection scheme, and calculate an overcurrent constant value based on the collected current values ​​using a preset margin coefficient, wherein the overcurrent constant value = the collected current when the short-circuit current exceeds the standard fault occurs at the local station / the margin coefficient K; A determination module is configured to determine, based on each overcurrent setting value and using a preset setting rule, an operating fault range for each current collection scheme, wherein the operating fault range is the proportion of the fault current reaching the opposite side of the line, calculated from the 220 kV side of the local station, wherein the operating fault range = (collected current under the fault on the 220 kV side of the local station - overcurrent setting value) / (collected current under the fault on the 220 kV side of the local station - collected current under the fault on the opposite side of the power plant); The setting module is configured to select a minimum action fault range from each action fault range, and use the overcurrent setting in the acquisition current scheme corresponding to the minimum action fault range as the final fast switch setting.

6. An electronic device, characterized in that: include: At least one processor, and a memory communicatively connected to the at least one processor, wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method according to any one of claims 1 to 4.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 4 is implemented.

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