A method and system for relay protection of electrical system of gas turbine power plant

Abstract

The present invention discloses a method and system for relay protection of an electrical system of a gas turbine power plant, including obtaining historical data of the electrical system of the gas turbine power plant under normal working conditions, combining a neural network, and establishing an electrical system model of the gas turbine power plant; simulating fault conditions under different states and model parameter data before and after the fault conditions according to the electrical system model of the gas turbine power plant, and processing the faults; establishing a mapping table of fault processing methods, fault conditions under different states, and model parameter data before and after the corresponding fault conditions; judging the fault conditions according to the real-time data of the electrical system of the gas turbine power plant, calling the fault processing method in the mapping table in real time, and performing relay protection on the electrical system of the gas turbine power plant. The fault processing method can be called very quickly and accurately to realize relay protection of the electrical system of the gas turbine power plant.

Description

Technical Field

[0001] The present invention relates to the technical field of relay protection of an electrical system of a gas turbine power plant, and in particular to a relay protection method and system for an electrical system of a gas turbine power plant. Background Art

[0002] With the development of modernization, the scale of power systems in gas turbine power plants continues to expand, and the operation of power grids becomes more and more complex, which brings new opportunities and challenges to relay protection, which is the first line of defense for power systems in gas turbine power plants.

[0003] Traditional technologies are unable to achieve fault classification and corresponding processing, nor are there corresponding mapping tables established through modeling and data comparison to handle corresponding faults. As a result, relevant technicians have to go to the site every time a fault is handled. If there is a situation that inexperienced technicians cannot solve or the fault problem cannot be solved in time, the entire gas turbine power plant power system will face the risk of collapse and will bring huge losses. Therefore, a relay protection method that can achieve rapid processing is urgently needed at this stage. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the above existing problems, the present invention is proposed.

[0006] Therefore, the present invention provides a relay protection method and system for an electrical system of a gas turbine power plant, which can solve the problems arising in the background technology.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a relay protection method for an electrical system of a gas turbine power plant, comprising:

[0008] Obtain historical data of the electrical system of a gas turbine power plant under normal operating conditions, and establish a model of the electrical system of the gas turbine power plant by combining it with a neural network;

[0009] According to the electrical system model of the gas turbine power plant, the fault conditions under different states and the model parameter data before and after the fault conditions are simulated, and the faults are processed;

[0010] Establish a mapping table for fault handling methods, fault conditions under different states, and model parameter data before and after the corresponding fault conditions;

[0011] According to the real-time data of the electrical system of the gas turbine power plant, the fault situation is judged, and the fault processing method in the mapping table is called in real time to perform relay protection on the electrical system of the gas turbine power plant.

[0012] As a preferred solution of the relay protection method for the electrical system of a gas turbine power plant described in the present invention, wherein: the electrical system model of the gas turbine power plant includes:

[0013] The historical data is divided into a training set and a test set in a ratio of 4:1, and the objective function of the electrical system model of the gas turbine power plant is trained according to the classified training set;

[0014] The historical data includes different line loads under normal operating conditions of the electrical system of the gas turbine power plant, different line load point sets of the electrical system of the gas turbine power plant, different equipment component loads under normal operating conditions of the electrical system of the gas turbine power plant, and external interference loads.

[0015] As a preferred solution of the relay protection method for the electrical system of a gas turbine power plant described in the present invention, wherein: the electrical system model of the gas turbine power plant also includes:

[0016] The objective function is as follows:

[0017]

[0018] Among them, S r Indicates the total amount of electrical energy input to the electrical system of a gas turbine power plant, P i,t It represents the load of load node i in the electrical system of the gas turbine power plant at time t, Q j,t W represents the load of line j in the electrical system of a gas turbine power plant at time t, k,t It represents the load of the k equipment component in the electrical system of the gas turbine power plant at time t, n is the total number of load nodes in the electrical system of the gas turbine power plant, m is the total number of lines in the electrical system of the gas turbine power plant, and l is the total number of equipment components in the electrical system of the gas turbine power plant.

[0019] As a preferred solution of the relay protection method for the electrical system of a gas turbine power plant described in the present invention, wherein: the electrical system model of the gas turbine power plant also includes:

[0020] The constraints on the objective function are as follows:

[0021]

[0022] Among them, L j Indicates the disconnection status of line j. When L j When the value of is 0, line j is disconnected. j When the value of is 1, circuit j is closed. represents the maximum active power that line j can bear, It represents the maximum reactive power that line j can bear, Y j,t Indicates the current active power of line j, Q j,t Indicates the current reactive power of line j.

[0023] As a preferred solution of the relay protection method for the electrical system of a gas turbine power plant described in the present invention, wherein: the fault conditions under different states include primary fault, secondary fault and tertiary fault,

[0024] When the electrical system of the gas turbine power plant lacks power, lacks voltage, has frequency deviation, has reverse polarity, has reverse phase and neutral connection, lacks one-phase power, has phase sequence change, has AC and DC confusion, has overheated and burned, cannot operate, has electrical breakdown, or has deteriorated performance, the fault is considered a primary fault.

[0025] When the electrical system of the gas turbine power plant is disconnected, short-circuited, short-connected, grounded, or has a wiring error, the fault is considered a secondary fault.

[0026] When there is a line aging fault in the electrical system of a gas turbine power plant or a device component damage fault in the electrical system of a gas turbine power plant, the fault is deemed to be a level 3 fault.

[0027] As a preferred solution of the relay protection method for the electrical system of a gas turbine power plant described in the present invention, the fault handling method includes:

[0028] When the fault is determined to be a level 3 fault, the server system retrieves the model data of the electric system of the gas turbine power plant one minute before the fault occurs, and compares the mapping table to determine the specific cause of the fault, and informs the inspection personnel in the fault area of ​​the specific solution, and retrieves the corresponding line and / or equipment components for replacement. When the inspection personnel in the fault area are handling the problem on site, they will provide feedback to the server system on whether the solution is correct.

[0029] If the solution is correct, no action will be taken;

[0030] If the current solution is incorrect, wait for the regional inspection personnel to change the solution, send the actual solution to the server system, and update it in the mapping table;

[0031] When the fault is determined to be a secondary fault, the server system retrieves the model data of the electrical system of the gas turbine power plant one minute before the fault occurs, and compares the mapping table to determine the specific fault node, and notifies the inspection personnel in the fault area to connect the nodes with a short-circuit wire to isolate the faulty part and determine the specific cause of the fault;

[0032] If the secondary fault is caused by a line fault, the corresponding specific line will be short-circuited directly to replace the primary line, and the corresponding line will be replaced again when the power system is under maintenance;

[0033] If the secondary fault is caused by a line fault or a device component fault, the faulty line and device component will be short-circuited, and the maintenance personnel will be notified to repair the problem and reconnect the line to the system within a limited time period;

[0034] When the fault is determined to be a primary fault, the server system directly performs trip termination processing on the faulty part through the mapping table, isolates the corresponding faulty part, performs relay protection, and notifies maintenance personnel to handle the fault;

[0035] If the fault is eliminated, the maintenance personnel shall conduct further inspection of the whole machine before supplying power, and check to confirm whether the fault has been eliminated;

[0036] If the fault has been eliminated, notify the operator to conduct a trial run and determine whether the equipment is operating normally;

[0037] If the fault is not eliminated, repair it again.

[0038] As a preferred solution of the relay protection method for the electrical system of a gas turbine power plant described in the present invention, it also includes:

[0039] When a new device component is connected to the electrical system of a gas turbine power plant, the new device component is judged. If the newly added device component is an existing device component and the initial parameters are the same as those of the device component of the same type, the device component is directly connected. If the device component fails, the processing method is consistent with the processing method of the same type of device component in the mapping table.

[0040] If the newly added equipment component is an equipment component of a non-existent type or / and already exists but has different initial parameters from the equipment component of this type, it is necessary to retrain the electrical system model of the gas turbine power plant based on the generated real-time data and update the corresponding mapping table.

[0041] A relay protection system for an electrical system of a gas turbine power plant, characterized in that it comprises a model building module, a fault preprocessing module, a mapping building module and a relay protection module.

[0042] A model building module, wherein the model building module is used to obtain historical data of the electrical system of the gas turbine power plant under normal operating conditions, and to build a model of the electrical system of the gas turbine power plant in combination with a neural network;

[0043] A fault preprocessing module, which is used to simulate fault conditions under different states and model parameter data before and after the fault conditions according to the electrical system model of the gas turbine power plant, and process the faults;

[0044] A mapping establishment module, the mapping establishment module is used to establish a mapping table of fault handling methods, fault conditions under different states, and model parameter data before and after the corresponding fault conditions;

[0045] The relay protection module is used to judge the fault situation according to the real-time data of the electrical system of the gas turbine power plant, and to call the fault handling method in the mapping table in real time to perform relay protection on the electrical system of the gas turbine power plant.

[0046] A computer device comprises a memory and a processor, wherein the memory stores a computer program, and wherein the processor implements the steps of the above method when executing the computer program.

[0047] A computer-readable storage medium stores a computer program, wherein the computer program implements the steps of the method described above when executed by a processor.

[0048] Beneficial effects of the present invention: The present invention proposes a method and system for relay protection of an electrical system of a gas turbine power plant. The electrical system model of the gas turbine power plant established by a neural network can accurately reflect the power system state parameter information from the data, and by simulating all faults, the parameter data under all fault conditions are obtained, and then compared with the real-time data, the fault situation can be accurately obtained, and different fault situation processing methods are summarized and a mapping table is established. The fault processing method can be quickly and accurately called up, and the relay protection of the electrical system of the gas turbine power plant can be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0050] Figure 1 A method flow chart of a relay protection method and system for an electrical system of a gas turbine power plant provided by an embodiment of the present invention;

[0051] Figure 2An internal structural diagram of a computer device of a relay protection method and system for an electrical system of a gas turbine power plant provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0052] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0053] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0054] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0055] The present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0056] At the same time, in the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper, lower, inner and outer" are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first, second or third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0057] In the present invention, unless otherwise clearly specified and limited, the terms "install, connect, connect" should be understood in a broad sense, for example: it can be a fixed connection, a detachable connection or an integral connection; it can also be a mechanical connection, an electrical connection or a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] Example 1

[0059] Reference Figure 1-2 , which is the first embodiment of the present invention, provides a method and system for relay protection of an electrical system of a gas turbine power plant, including:

[0060] Obtain historical data of the electrical system of a gas turbine power plant under normal operating conditions, and establish a model of the electrical system of the gas turbine power plant by combining it with a neural network;

[0061] The electrical system model of the gas turbine power plant includes dividing the historical data into a training set and a test set in a ratio of 4:1, and training the objective function of the electrical system model of the gas turbine power plant according to the classified training set;

[0062] Specifically, the historical data includes the load of different lines under normal operating conditions of the electrical system of the gas turbine power plant, the set of different line load points of the electrical system of the gas turbine power plant, the load of different equipment components under normal operating conditions of the electrical system of the gas turbine power plant, and the external interference load.

[0063] Furthermore, the electrical system model of the gas turbine power plant also includes the following objective function:

[0064]

[0065] Among them, S r Indicates the total amount of electrical energy input to the electrical system of a gas turbine power plant, P i,t It represents the load of load node i in the electrical system of the gas turbine power plant at time t, Q j,t W represents the load of line j in the electrical system of a gas turbine power plant at time t, k,t It represents the load of the k equipment component in the electrical system of the gas turbine power plant at time t, n is the total number of load nodes in the electrical system of the gas turbine power plant, m is the total number of lines in the electrical system of the gas turbine power plant, and l is the total number of equipment components in the electrical system of the gas turbine power plant.

[0066] Furthermore, the electrical system model of the gas turbine power plant also includes the following constraints for the objective function:

[0067]

[0068] Among them, L j Indicates the disconnection status of line j. When L j When the value of is 0, line j is disconnected. j When the value of is 1, circuit j is closed. represents the maximum active power that line j can bear, It represents the maximum reactive power that line j can bear, Y j,t Indicates the current active power of line j, Qj,t Indicates the current reactive power of line j.

[0069] Furthermore, the fault conditions under different states and the model parameter data before and after the fault conditions are simulated according to the electrical system model of the gas turbine power plant, and the faults are processed accordingly;

[0070] Furthermore, a mapping table is established for the fault handling method, the fault conditions under different states, and the model parameter data before and after the corresponding fault conditions;

[0071] Furthermore, according to the real-time data of the electrical system of the gas turbine power plant, the fault situation is judged, and the fault handling method in the mapping table is called in real time to perform relay protection on the electrical system of the gas turbine power plant.

[0072] It should be noted that the fault conditions under different states include primary fault, secondary fault and tertiary fault.

[0073] Among them, when the electrical system of the gas turbine power plant lacks power, the electrical system of the gas turbine power plant lacks voltage, the electrical system of the gas turbine power plant has frequency deviation, the electrical system of the gas turbine power plant has reverse polarity, the phase line and the neutral line of the electrical system of the gas turbine power plant are reversed, the electrical system of the gas turbine power plant lacks one-phase power, the phase sequence of the electrical system of the gas turbine power plant changes, the AC and DC of the electrical system of the gas turbine power plant are mixed, the electrical system of the gas turbine power plant is overheated and burned, the electrical system of the gas turbine power plant cannot operate, the electrical system of the gas turbine power plant has electrical breakdown, and the performance of the electrical system of the gas turbine power plant deteriorates, then the fault is identified as a primary fault;

[0074] Furthermore, when the electrical system of the gas turbine power plant is disconnected, short-circuited, short-circuited, grounded, or miswired, the fault is considered a secondary fault.

[0075] Furthermore, when there is a line aging fault in the electrical system of a gas turbine power plant and a device component damage fault in the electrical system of a gas turbine power plant, the fault is identified as a level 3 fault.

[0076] It should be noted that the fault handling method includes, when the fault is determined to be a level 3 fault, the server system retrieves the model data of the electric system of the gas turbine power plant one minute before the fault occurs, and compares the mapping table to determine the specific cause of the fault, and notifies the inspection personnel in the fault area of ​​the specific solution, and retrieves the corresponding line or / and equipment components for replacement operation. When the inspection personnel in the fault area are performing on-site processing, they will feedback to the server system whether the solution is correct;

[0077] Furthermore, if the solution is correct, no action is performed;

[0078] Furthermore, if the current solution is incorrect, the actual solution will be sent to the server system and updated in the mapping table after waiting for the regional inspection personnel to change the solution;

[0079] It should be noted that when the fault is determined to be a secondary fault, the server system retrieves the model data of the electrical system of the gas turbine power plant one minute before the fault occurs, and compares the mapping table to determine the specific fault node, and notifies the inspection personnel in the fault area to connect the nodes with a short-circuit wire to isolate the faulty part and determine the specific cause of the fault;

[0080] Furthermore, if the secondary fault is caused by a line fault, the corresponding specific line is directly short-circuited to achieve primary line replacement, and the corresponding line is replaced again when waiting for power system maintenance;

[0081] Furthermore, if the secondary fault is caused by a line fault or a device component fault, the faulty line and device component are short-circuited, and maintenance personnel are notified to repair the problem and reconnect the line to the system within a limited time period;

[0082] It should be noted that when the fault is determined to be a primary fault, the server system directly performs a trip termination method on the faulty part through the mapping table, isolates the corresponding faulty part, performs relay protection, and notifies maintenance personnel to handle the fault;

[0083] Furthermore, if the fault has been eliminated, the maintenance personnel shall conduct further inspection of the whole machine before supplying power, and check and confirm whether the fault has indeed been eliminated;

[0084] Furthermore, if the fault has been eliminated, the operator is notified to perform a trial operation and determine whether the equipment is operating normally;

[0085] Furthermore, if the fault is not eliminated, the fault is repaired again.

[0086] It should be noted that when a new device component is connected to the electrical system of a gas turbine power plant, the new device component is judged. If the newly added device component is an existing device component and the initial parameters are the same as those of the device component of the same type, the device component is directly connected, and when the device component fails, the processing method is consistent with the processing method of the same type of device component in the mapping table;

[0087] It should be noted that if the newly added equipment component is a non-existent type of equipment component or / and already exists but has different initial parameters from that type of equipment component, it is necessary to retrain the electrical system model of the gas turbine power plant based on the real-time data generated and update the corresponding mapping table.

[0088] In a preferred embodiment, a relay protection system for an electrical system of a gas turbine power plant includes a model building module, a fault preprocessing module, a mapping building module and a relay protection module.

[0089] Model building module: The model building module is used to obtain historical data of the electrical system of the gas turbine power plant under normal operating conditions, and to build a model of the electrical system of the gas turbine power plant by combining with a neural network;

[0090] Fault preprocessing module: The fault preprocessing module is used to simulate fault conditions under different states and model parameter data before and after the fault conditions according to the electrical system model of the gas turbine power plant, and process the faults;

[0091] A mapping establishment module, the mapping establishment module is used to establish a mapping table for the fault handling method, the fault conditions under different states, and the model parameter data before and after the corresponding fault conditions;

[0092] The relay protection module is used to judge the fault situation according to the real-time data of the electrical system of the gas turbine power plant, call the fault handling method in the mapping table in real time, and perform relay protection on the electrical system of the gas turbine power plant.

[0093] The above-mentioned unit modules may be embedded in or independent of a processor in a computer device in the form of hardware, or may be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to the above-mentioned modules.

[0094] In one embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as follows: Figure 2 As shown. The computer device includes a processor, a memory, a communication interface, a display screen and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, an operator network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a relay protection method for the electrical system of a gas turbine power plant is implemented. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covered on the display screen, or a key, trackball or touchpad set on the computer device housing, or an external keyboard, touchpad or mouse, etc.

[0095] In one embodiment, a computer readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

[0096] Obtain historical data of the electrical system of a gas turbine power plant under normal operating conditions, and establish a model of the electrical system of the gas turbine power plant by combining it with a neural network;

[0097] According to the electrical system model of the gas turbine power plant, simulate the fault conditions under different states and the model parameter data before and after the fault conditions, and handle the faults accordingly;

[0098] Establish a mapping table for fault handling methods, fault conditions under different states, and model parameter data before and after the corresponding fault conditions;

[0099] According to the real-time data of the electrical system of the gas turbine power plant, the fault situation is judged, the fault handling method in the mapping table is called in real time, and the electrical system of the gas turbine power plant is relay protected.

[0100] 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 preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

[0101] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of complete hardware embodiments, complete software embodiments, or embodiments in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code. The scheme in the embodiments of the present application can be implemented in various computer languages, for example, object-oriented programming language Java and literal scripting language JavaScript, etc.

[0102] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1A device that provides the functions specified in a block or multiple blocks.

[0103] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0104] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0105] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0106] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A relay protection method for an electrical system of a gas turbine power plant, characterized in that: include, Obtain historical data of the electrical system of a gas turbine power plant under normal operating conditions, and establish a model of the electrical system of the gas turbine power plant by combining it with a neural network; According to the electrical system model of the gas turbine power plant, the fault conditions under different states and the model parameter data before and after the fault conditions are simulated, and the faults are processed; Establish a mapping table for fault handling methods, fault conditions under different states, and model parameter data before and after the corresponding fault conditions; According to the real-time data of the electrical system of the gas turbine power plant, the fault situation is judged, and the fault handling method in the mapping table is called in real time to perform relay protection on the electrical system of the gas turbine power plant; The fault conditions under the different states include primary fault, secondary fault and tertiary fault. When the electrical system of the gas turbine power plant lacks power, lacks voltage, has frequency deviation, has reverse polarity, has reverse phase and neutral connection, lacks one-phase power, has phase sequence change, has AC and DC confusion, has overheated and burned, cannot operate, has electrical breakdown, or has deteriorated performance, the fault is considered a primary fault. When the electrical system of the gas turbine power plant is disconnected, short-circuited, short-connected, grounded, or has a wiring error, the fault is considered a secondary fault. When there is a line aging fault in the electrical system of a gas turbine power plant or a device component damage fault in the electrical system of a gas turbine power plant, the fault is deemed to be a level 3 fault.

2. The relay protection method for the electrical system of a gas turbine power plant according to claim 1, characterized in that: The electrical system model of the gas turbine power plant includes: The historical data is divided into a training set and a test set in a ratio of 4:1, and the objective function of the electrical system model of the gas turbine power plant is trained according to the classified training set; The historical data includes different line loads under normal operating conditions of the electrical system of the gas turbine power plant, different line load point sets of the electrical system of the gas turbine power plant, different equipment component loads under normal operating conditions of the electrical system of the gas turbine power plant, and external interference loads.

3. The relay protection method for the electrical system of a gas turbine power plant according to claim 2, characterized in that: The electrical system model of the gas turbine power plant also includes: The objective function is as follows: Among them, S r Indicates the total amount of electrical energy input to the electrical system of a gas turbine power plant, P i,t It represents the load of load node i in the electrical system of the gas turbine power plant at time t, Q j,t W represents the load of line j in the electrical system of a gas turbine power plant at time t, k,t It represents the load of the k equipment component in the electrical system of the gas turbine power plant at time t, n is the total number of load nodes in the electrical system of the gas turbine power plant, m is the total number of lines in the electrical system of the gas turbine power plant, and l is the total number of equipment components in the electrical system of the gas turbine power plant.

4. The relay protection method for the electrical system of a gas turbine power plant according to claim 3, characterized in that: The electrical system model of the gas turbine power plant also includes: The constraints on the objective function are as follows: Among them, L j Indicates the disconnection status of line j. When L j When the value of is 0, line j is disconnected. j When the value of is 1, circuit j is closed. represents the maximum active power that line j can bear, It represents the maximum reactive power that line j can bear, Y j,t Indicates the current active power of line j, Q j,t Indicates the current reactive power of line j.

5. The relay protection method for the electrical system of a gas turbine power plant according to claim 4, characterized in that: The fault handling method comprises: When the fault is determined to be a level 3 fault, the server system retrieves the model data of the electric system of the gas turbine power plant one minute before the fault occurs, and compares the mapping table to determine the specific cause of the fault, and informs the inspection personnel in the fault area of ​​the specific solution, and retrieves the corresponding line and / or equipment components for replacement. When the inspection personnel in the fault area are handling the problem on site, they will provide feedback to the server system on whether the solution is correct. If the solution is correct, no action will be taken; If the current solution is incorrect, wait for the regional inspection personnel to change the solution, send the actual solution to the server system, and update it in the mapping table; When the fault is determined to be a secondary fault, the server system retrieves the model data of the electrical system of the gas turbine power plant one minute before the fault occurs, and compares the mapping table to determine the specific fault node, and notifies the inspection personnel in the fault area to connect the nodes with a short-circuit wire to isolate the faulty part and determine the specific cause of the fault; If the secondary fault is caused by a line fault, the corresponding specific line will be short-circuited directly to replace the primary line, and the corresponding line will be replaced again when the power system is under maintenance; If the secondary fault is caused by a line fault or a device component fault, the faulty line and device component will be short-circuited, and the maintenance personnel will be notified to repair the problem and reconnect the line to the system within a limited time period; When the fault is determined to be a primary fault, the server system directly performs trip termination processing on the faulty part through the mapping table, isolates the corresponding faulty part, performs relay protection, and notifies maintenance personnel to handle the fault; If the fault is eliminated, the maintenance personnel shall conduct further inspection of the whole machine before supplying power, and check to confirm whether the fault has been eliminated; If the fault has been eliminated, notify the operator to conduct a trial run and determine whether the equipment is operating normally; If the fault is not eliminated, repair it again.

6. The relay protection method for the electrical system of a gas turbine power plant according to claim 5, characterized in that: Also includes, When a new device component is connected to the electrical system of a gas turbine power plant, the new device component is judged. If the newly added device component is an existing device component and the initial parameters are the same as those of the device component of the same type, the device component is directly connected. If the device component fails, the processing method is consistent with the processing method of the same type of device component in the mapping table. If the newly added equipment component is an equipment component of a non-existent type or / and already exists but has different initial parameters from the equipment component of this type, it is necessary to retrain the electrical system model of the gas turbine power plant based on the generated real-time data and update the corresponding mapping table.

7. A system using the relay protection method for the electrical system of a gas turbine power plant according to claim 1, characterized in that: It includes model building module, fault preprocessing module, mapping building module and relay protection module. A model building module, wherein the model building module is used to obtain historical data of the electrical system of the gas turbine power plant under normal operating conditions, and to build a model of the electrical system of the gas turbine power plant in combination with a neural network; A fault preprocessing module, which is used to simulate fault conditions under different states and model parameter data before and after the fault conditions according to the electrical system model of the gas turbine power plant, and process the faults; A mapping establishment module, the mapping establishment module is used to establish a mapping table of fault handling methods, fault conditions under different states, and model parameter data before and after the corresponding fault conditions; The relay protection module is used to judge the fault situation according to the real-time data of the electrical system of the gas turbine power plant, and to call the fault handling method in the mapping table in real time to perform relay protection on the electrical system of the gas turbine power plant.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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