Variable frequency converter simulation method, system, storage medium and electronic device

Abstract

The present disclosure relates to a variable frequency converter simulation method, system, storage medium and electronic device, the method comprising: respectively establishing a variable frequency converter model, an external control instruction interface model and a generator interface model; the external control instruction interface model is used as an input interface of the variable frequency converter model, so that the variable frequency converter model receives the external control instruction; the generator interface model is used as an output interface of the variable frequency converter model, so that the output of the variable frequency converter model is connected to the stator of the generator; the variable frequency converter model drives the generator to change from a static state to a grid-connected power generation state in response to the external control instruction. The embodiment of the present disclosure can simulate the actual gas turbine generator starting process.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of frequency converters, in particular, to a frequency converter simulation method, system, storage medium and electronic device. BACKGROUND

[0002] With the sustained and rapid development of China's economy, the pressure of environmental protection and energy saving and emission reduction is increasing, and the demand for clean energy utilization is becoming more and more urgent. As a clean power application, the proportion of gas power generation in domestic primary energy consumption will become larger and larger.

[0003] With the increase of gas turbine capacity and the development of power electronic technology, static frequency converter (SFC) has become the preferred way for gas turbine generator startup, and is also one of the key technologies to ensure the reliable startup of gas turbine generator.

[0004] The startup process of gas turbine generator is relatively complex, and simulation is very important in the development and use of frequency converter, and an actual frequency converter simulation method is urgently needed. SUMMARY

[0005] The purpose of the present disclosure is to provide a frequency converter simulation method, system, storage medium and electronic device for simulating the startup process of gas turbine generator.

[0006] In order to achieve the above purpose, according to a first aspect of the embodiment of the present disclosure, a frequency converter simulation method is provided, which is applied to the startup process of gas turbine generator, and the method comprises:

[0007] a frequency converter model, an external control instruction interface model and a generator interface model are established respectively;

[0008] The external control instruction interface model is used as the input interface of the frequency converter model, so that the frequency converter model receives external control instructions;

[0009] The generator interface model is used as the output interface of the frequency converter model, so that the output of the frequency converter model is connected to the stator of the generator;

[0010] The frequency converter model drives the generator to change from a static state to a grid-connected power generation state in response to external control instructions.

[0011] Optionally, the external control instruction comprises at least one of the following:

[0012] a startup request control instruction for instructing the frequency converter model to output a first alternating current to make the generator enter a first target rotating speed;

[0013] A mode conversion control instruction for instructing the frequency converter model to output a second alternating current to make the generator enter a second target rotating speed;

[0014] A high speed maintaining request control instruction for instructing the frequency converter model to output a first constant voltage alternating current to make the generator maintain the second target rotating speed and keep a first duration period;

[0015] A high speed maintaining off control instruction for instructing the frequency converter model to stop outputting to make the generator fall to a third target rotating speed;

[0016] A low speed maintaining request control instruction for instructing the frequency converter model to output a second constant voltage alternating current to make the generator maintain a fourth target rotating speed and keep a second duration period, and start the engine ignition;

[0017] An acceleration start control instruction for instructing the frequency converter model to output a third alternating current to make the generator enter a fifth target rotating speed;

[0018] A frequency converter exit control instruction for instructing the frequency converter model to gradually reduce the output until the frequency converter model is disconnected from the generator, and the frequency converter model enters a shutdown state.

[0019] Optionally, the frequency converter model, in response to an external control instruction, drives the generator to change from a static state to a grid-connected power generation state, includes:

[0020] When the frequency converter model enters the shutdown state, the generator is driven by the engine to a grid-connected rotating speed to enter a grid-connected power generation state.

[0021] Optionally, the first alternating current is less than the second alternating current, and the second alternating current is less than the third alternating current.

[0022] Optionally, the first constant voltage alternating current is greater than the second constant voltage alternating current.

[0023] Optionally, the first duration period is greater than the second duration period.

[0024] Optionally, the first target rotating speed is less than the third target rotating speed, the third target rotating speed is less than the fourth target rotating speed, the fourth target rotating speed is less than the second target rotating speed, the second target rotating speed is less than the fifth target rotating speed.

[0025] Optionally, a rotating speed calculation model of the generator driven by the frequency converter is:

[0026] N0=N 0_last +0.01*(1+k1)*N 0_t

[0027] Wherein: N0 is the current speed of the generator, N 0_last N is the last speed of the generator, k1 is the speed-up rate, N 0_t is the target speed.

[0028] Optionally, the speed calculation model of the generator driven by the gas turbine is:

[0029]

[0030] Wherein: N B is the current speed of the generator, N B_last is the last speed of the generator, Step1 is the step length of the rush, Coetem is the damping coefficient, ΔP is the power conversion coefficient, T j is the time constant.

[0031] According to the second aspect of the embodiments of the present disclosure, a frequency converter simulation system is provided, the system comprising:

[0032] a generator connected to a generator interface model, configured as a system load;

[0033] a frequency converter model configured to change the generator from a static state to a grid-connected power generation state in response to an external control instruction;

[0034] an external control instruction interface model configured as an input interface of the frequency converter model, for the frequency converter model to receive an external control instruction;

[0035] a generator interface model configured as an output interface of the frequency converter model, for connecting the output of the frequency converter model to the stator of the generator.

[0036] Optionally, the system further comprises a gas turbine connected to the generator, configured to drive the generator to a grid-connected speed and enter a grid-connected power generation state when the frequency converter model enters a shutdown state.

[0037] According to the third aspect of the embodiments of the present disclosure, a non-transitory computer readable storage medium is provided, which stores a computer program, and the program is executed by a processor to implement the steps of any method of the first aspect.

[0038] According to the fourth aspect of the embodiments of the present disclosure, an electronic device is provided, comprising:

[0039] a memory having a computer program stored thereon;

[0040] a processor for executing the computer program in the memory to implement the steps of any method of the first aspect.

[0041] In the above technical solution, the frequency converter model, the external control instruction interface model and the generator interface model are respectively established; the external control instruction interface model is used as an input interface of the frequency converter model, and is used for the frequency converter model to receive the external control instruction; the generator interface model is used as an output interface of the frequency converter model, and is used for connecting the output of the frequency converter model to the stator of the generator; the frequency converter model drives the generator to change from the static state to the grid-connected power generation state in response to the external control instruction. Through the above implementation manner, the actual starting process of the gas turbine generator can be simulated, thereby providing help for the development and use of the frequency converter.

[0042] Other features and advantages of the present disclosure will be described in detail in the following detailed description section. BRIEF DESCRIPTION OF DRAWINGS

[0043] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, which together with the following detailed description, serve to explain the present disclosure. In the drawings:

[0044] Figure 1 is a block diagram of a frequency converter simulation system according to an exemplary embodiment;

[0045] Figure 2 is a flowchart of a frequency converter simulation method according to an exemplary embodiment;

[0046] Figure 3 is a flowchart of a frequency converter simulation method according to an exemplary embodiment;

[0047] Figure 4 is a schematic diagram of a generator starting process according to an exemplary embodiment;

[0048] Figure 5 is a flowchart of a frequency converter simulation method according to another exemplary embodiment;

[0049] Figure 6 is a visual model schematic diagram of a frequency converter simulation system according to an exemplary embodiment;

[0050] Figure 7 is a block diagram of an electronic device 700 according to an exemplary embodiment. DETAILED DESCRIPTION

[0051] The detailed description of the present disclosure is described in detail below with reference to the accompanying drawings. It should be understood that the detailed description described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0052] It should be noted that all the actions of acquiring signals, information or data in the present disclosure are carried out in compliance with the corresponding data protection regulations and policies of the country where the device is located, and with the authorization given by the owner of the corresponding device.

[0053] In the present disclosure, it should be understood that each step recorded in the method embodiments of the present disclosure can be executed in different order and / or in parallel. In addition, the method embodiments can include additional steps and / or omit the execution of the steps shown. The scope of the present disclosure is not limited in this respect.

[0054] The term "comprising" and variations thereof as used herein are open-ended, that is "including, but not limited to".

[0055] The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Related definitions will be given in the description below.

[0056] It should be noted that the "first", "second", and the like concepts mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0057] The present disclosure will be described below in conjunction with specific embodiments.

[0058] First, the application scenario of the present disclosure is described. The present disclosure can be applied to the process of simulating the starting process of a gas turbine generator. The frequency converter, which is exemplarily a static frequency converter, is an important power device in the starting process of the gas turbine, including a ballast bridge, an inverter, a controller, a reactor, etc. The static frequency converter can drag the gas turbine generator from the static state to the rated speed of grid-connected power generation, or stabilize the generator at a certain speed. Its power supply voltage comes from the plant 6kV bus, which is connected to the static frequency converter through a transformer, and is converted to variable frequency AC power through a rectifier, a reactor and an inverter, and is input to the generator stator coil. It plays a very important and indispensable role in the starting process of the gas turbine.

[0059] The frequency converter simulation method of the embodiment of the present disclosure is mainly applied to a gas turbine unit. The starting of the gas turbine generator is a complex dynamic process. The process includes that the frequency converter drives the gas turbine generator to start in the synchronous motor mode, from the static state to the turning speed, then accelerates to the cleaning blowing speed and maintains for a period of time, and then the frequency converter stops outputting. The unit falls to the ignition speed. After the gas turbine is ignited, the frequency converter is re-input to increase the generator speed to the warm-up speed. After the warm-up for a period of time, the frequency converter reduces the output until the generator reaches a certain speed, and then the frequency converter is disabled. In different stages of the starting of the generator, the frequency converter has different effects. The frequency converter simulation method of the embodiment of the present disclosure can simulate the dynamic starting process of the generator.

[0060] Figure 1 is a block diagram of a frequency converter simulation system according to an example embodiment. As shown in Figure 1 the system can include an external control instruction interface model 10, a frequency converter model 20, a generator interface model 30, and a generator 40. The external control instruction interface model 10 is configured as an input interface of the frequency converter model 20, for the frequency converter model 20 to receive external control instructions. The frequency converter model 20 is configured to drive the generator 40 to change from a static state to a grid-connected power generation state in response to the external control instructions. The generator interface model 30 is configured as an output interface of the frequency converter model 20, for connecting the output of the frequency converter model 20 to the stator of the generator 40. The generator 40 is connected to the generator interface model 30 and is configured as a system load.

[0061] Optionally, the system further includes a gas turbine 50 connected to the generator 40 and configured to drive the generator 40 to the grid-connected speed and enter the grid-connected power generation state when the frequency converter model 20 enters the shutdown state.

[0062] In the above technical solution, the frequency converter model, the external control instruction interface model, and the generator interface model are respectively established. The external control instruction interface model is configured as an input interface of the frequency converter model, for the frequency converter model to receive external control instructions. The generator interface model is configured as an output interface of the frequency converter model, for connecting the output of the frequency converter model to the stator of the generator. The frequency converter model drives the generator to change from a static state to a grid-connected power generation state in response to the external control instructions. The frequency converter simulation system can simulate the actual starting process of the gas turbine generator through the above implementation manner, thereby providing help for the development and use of the frequency converter.

[0063] Figure 2 is a flow chart of a frequency converter simulation method according to an example embodiment. As shown in Figure 2 the frequency converter simulation method can include the following steps:

[0064] In step S210, a frequency converter model, an external control command interface model, and a generator interface model are established respectively. The external control command interface model serves as the input interface of the frequency converter model, used for the frequency converter model to receive external control commands. The generator interface model serves as the output interface of the frequency converter model, used to connect the output of the frequency converter model to the stator of the generator.

[0065] For example, on the DCOSE (Distributed Component Oriented Simulation Environment) real-time simulation platform, a frequency converter model 20, an external control command interface model 10, and a generator interface model 30 were implemented using C language and FORTRAN code. Furthermore, a model capable of representing the dynamic process of a gas turbine frequency converter driving a generator during startup was built using the VISIO graphical modeling instantiation method. The visualized model of the frequency converter simulation system is shown below. Figure 6 As shown, the external control command interface model 10 and the generator interface model 30 are connected to the inverter model 20 and the generator 40 respectively through dynamic connection lines to bind variables. The external control command interface model 10 is used by the inverter model 20 to receive external control commands and is the input interface of the inverter model 20. The generator interface model 30 is used to connect the output of the inverter model 20 to the stator coil of the generator 40 and is the output interface of the inverter model 20.

[0066] In step S220, the inverter model responds to an external control command and drives the generator to change from a stationary state to a grid-connected power generation state.

[0067] For example, the inverter model 20 receives external control commands through the external control command interface model 10, and then, in response to the external control commands, outputs different alternating currents to the stator coils of the generator 40 through the generator interface model 30. This drives the generator 40 through the starting speed increase stage, high speed holding stage, speed decrease stage, low speed holding stage, and acceleration start stage, ultimately changing the generator from a stationary state to a grid-connected power generation state. This maximizes the replication of the actual operating conditions of a gas turbine generator startup.

[0068] In the above technical solution, a frequency converter model, an external control command interface model, and a generator interface model are established separately. The external control command interface model serves as the input interface for the frequency converter model, allowing it to receive external control commands. The generator interface model serves as the output interface for the frequency converter model, connecting its output to the generator stator. The frequency converter model responds to external control commands, driving the generator from a stationary state to a grid-connected power generation state. This frequency converter simulation method, through the above implementation, can closely simulate the actual gas turbine generator startup process, thus providing assistance for the development and use of frequency converters.

[0069] Figure 3 This is a flowchart illustrating a frequency converter simulation method according to an exemplary embodiment. Figure 4 This is a schematic diagram illustrating the generator starting process according to an exemplary embodiment. See also: Figures 3-4 The inverter simulation method may include the following steps:

[0070] In step S310, in response to the start request control command, a first alternating current is output to cause the generator to enter the first target speed.

[0071] For example, such as Figure 4 As shown, in response to the start request control command, inverter model 20 outputs a first alternating current, which can be... Figure 4 The first alternating current shown is a pulsed current, for example, 90A. The generator 40 reaches a first target speed, which can be the turning gear speed. For example, this turning gear speed can be 5 rpm.

[0072] In step S320, in response to the mode switching control command, a second alternating current is output to cause the generator to enter the second target speed.

[0073] For example, such as Figure 4 As shown, inverter model 20 responds to the mode switching control command and outputs a second alternating current, which can be... Figure 4 The second alternating current shown is a constant current, for example, 100A. The generator 40 enters a second target speed, which can be the cleaning speed, for example, 700 rpm. The second target speed is greater than the first target speed.

[0074] In step S330, in response to the high-speed hold request control command, a first constant voltage alternating current is output to enable the generator to maintain the second target speed and maintain the first continuous cycle.

[0075] For example, such as Figure 4As shown, in response to the high-speed hold request control command, inverter model 20 outputs a first constant voltage alternating current, which can be... Figure 4 The generator 40 maintains a first constant voltage alternating current at a second target speed, which can be a cleaning speed of 700 rpm, and maintains this cleaning speed for a first duration period, for example, 300 seconds.

[0076] In step S340, in response to the high-speed hold-off control command, the output is stopped so that the generator drops to the third target speed.

[0077] For example, such as Figure 4 As shown, in response to the high-speed hold-off control command, inverter model 20 stops outputting the first constant voltage alternating current, generator 40 loses power, and under inertia, it drops to the third target speed, which can be... Figure 4 The third target speed shown can be the pre-ignition speed; for example, this ignition speed could be 450 rpm. Figure 4 As shown, the third target rotational speed is greater than the first target rotational speed.

[0078] In step S350, in response to the low-speed hold request control command, a second constant voltage alternating current is output to maintain the fourth target speed of the generator and maintain the second continuous cycle, and the gas turbine is started to ignite.

[0079] For example, such as Figure 4 As shown, in response to the low-speed hold request control command, inverter model 20 outputs a second constant voltage alternating current, which can be... Figure 4 The second constant-voltage alternating current shown is less than the first constant-voltage alternating current. Generator 40 is maintained at a fourth target speed. At this time, the system initiates gas turbine ignition. This fourth target speed can be the warm-up speed, for example, 500 rpm, and is maintained at this warm-up speed for a second duration, for example, 60 seconds. This second duration is less than the first duration. Figure 4 As shown, the fourth target speed is greater than the third target speed but less than the second target speed.

[0080] In step S360, in response to the acceleration start control command, a third alternating current is output to bring the generator to the fifth target speed.

[0081] For example, such as Figure 4 As shown, in response to the acceleration start control command, inverter model 20 outputs a third alternating current, which can be... Figure 4The third alternating current is continuously increased, for example, the third alternating current can be 100-150 A, the third alternating current is greater than the second alternating current, the generator 40 is accelerated to a fifth target speed, and the fifth target speed can be a self-sustaining speed. For example, the self-sustaining speed can be 2200 rpm. As shown in FIG. 6, the fifth target speed is greater than the second target speed. Figure 4 As shown in FIG. 6, the fifth target speed is greater than the second target speed.

[0082] In step S370, in response to the frequency converter exit control instruction, the output is gradually reduced until the generator is disconnected, and the frequency converter model enters a shutdown state.

[0083] For example, as shown in FIG. 6, in response to the frequency converter exit control instruction, the frequency converter model 20 gradually reduces the output until the generator 40 is disconnected, and the frequency converter model 20 enters a shutdown state. Figure 5 As shown in FIG. 6, in response to the frequency converter exit control instruction, the frequency converter model 20 gradually reduces the output until the generator 40 is disconnected, and the frequency converter model 20 enters a shutdown state. Figure 5 As shown in FIG. 6, in response to the frequency converter exit control instruction, the frequency converter model 20 gradually reduces the output until the generator 40 is disconnected, and the frequency converter model 20 enters a shutdown state.

[0084] In the above technical solutions, the frequency converter model, the external control instruction interface model, and the generator interface model are respectively established; the external control instruction interface model is used as an input interface of the frequency converter model, for the frequency converter model to receive the external control instruction; the generator interface model is used as an output interface of the frequency converter model, for connecting the output of the frequency converter model to the stator of the generator; and the frequency converter model drives the generator to change from a static state to a grid-connected power generation state in response to the external control instruction. By simulating the processes of the generator startup speed rising stage, the high-speed maintaining stage, the speed descending stage, the low-speed maintaining stage, and the accelerating startup stage, the actual full process of simulating the gas turbine generator startup can be approached, thereby providing help for the development and use of the frequency converter.

[0085] Optionally, in all the method steps above, the speed calculation model of the generator driven by the frequency converter can be:

[0086] N0=N 0_last +0.01*(1+k1)*N 0_t

[0087] Wherein, N0 is the current speed of the generator, N 0_last is the speed of the generator at the previous moment, k1 is the speed-up rate, and N 0_t is the target speed.

[0088] Figure 6 is a flowchart of a frequency converter simulation method according to another example embodiment. In other embodiments, as shown in FIG. 6, the frequency converter simulation method can further include the following steps: Figure 6

[0089] ​Step S380, when the frequency converter model enters the shutdown state, the generator is driven by the gas turbine to the grid-connected speed, and enters the grid-connected power generation state.

[0090] In this step, the frequency converter model 20 enters the shutdown state, the generator 40 is driven by the gas turbine 50 to the grid-connected speed, and enters the grid-connected power generation state. Exemplarily, the grid-connected speed can be 3000 rpm, so as to be closest to the actual operation process of the restored gas turbine generator start.

[0091] Optionally, the speed calculation model of the generator driven by the gas turbine can be:

[0092]

[0093] Wherein: N B is the current speed standard value of the generator, and the reference is 3000 rpm, N B_last is the speed standard value of the generator at the last time, Step1 is the calculation step of the rush, Coetem is the damping coefficient, ΔP is the power conversion coefficient, T j is the time constant.

[0094] Exemplarily, in a possible implementation manner, the part of the code of the frequency converter model 20 modeling can be as follows:

[0095]

[0096]

[0097] The simulation parameter variables of the above frequency converter model can be referred to Table 1 below, which shows part of the simulation parameter variables of the frequency converter simulation system, wherein the meanings of the attribute names and field names are shown in the remarks column.

[0098] Table 1

[0099]

[0100]

[0101] Figure 7 is a visual model schematic diagram of the frequency converter simulation system according to an exemplary embodiment, and the visual models of the frequency converter and the generator of the frequency converter simulation system can be referred to Figure 7 . In the figure, SFC is a static frequency converter.

[0102] ​ is a block diagram of an electronic device 700 according to an exemplary embodiment. As ​As shown, the electronic device 700 can include a processor 701, a memory 702. The electronic device 700 can further include one or more of a multimedia component 703, an input / output (I / O) interface 704, and a communication component 705.

[0103] The processor 701 is configured to control overall operations of the electronic device 700 to complete all or part of the steps of the above-mentioned frequency converter simulation method. The memory 702 is configured to store various types of data to support operations of the electronic device 700, which can include, for example, instructions for operating any application or method on the electronic device 700, and application-related data, such as contact data, sent and received messages, pictures, audio, video, and the like. The memory 702 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk. The multimedia component 703 can include a screen and an audio component. The screen can be, for example, a touch screen, and the audio component is configured to output and / or input audio signals. For example, the audio component can include a microphone configured to receive external audio signals. The received audio signals can be further stored in the memory 702 or transmitted through the communication component 705. The audio component further includes at least one speaker configured to output audio signals. The I / O interface 704 provides an interface between the processor 701 and other interface modules, which can be a keyboard, a mouse, a button, and the like. The buttons can be virtual buttons or physical buttons. The communication component 705 is configured to perform wired or wireless communication between the electronic device 700 and other devices. The wireless communication, such as Wi-Fi, Bluetooth, near field communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, and the like, or a combination of one or more of them, is not limited herein. Therefore, the corresponding communication component 705 can include a Wi-Fi module, a Bluetooth module, an NFC module, and the like.

[0104] In an exemplary embodiment, the electronic device 700 can be implemented by one or more Application Specific Integrated Circuit (ASIC), Digital Signal Processor (DSP), Digital Signal Processing Device (DSPD), Programmable Logic Device (PLD), Field Programmable Gate Array (FPGA), controller, microcontroller, microprocessor, or other electronic elements for performing the above-mentioned variable frequency converter simulation method.

[0105] In another exemplary embodiment, a computer readable storage medium including program instructions is also provided, which, when executed by a processor, implements the steps of the above-mentioned variable frequency converter simulation method. For example, the computer readable storage medium can be the above-mentioned memory 702 including program instructions, and the above-mentioned program instructions can be executed by the processor 701 of the electronic device 700 to complete the above-mentioned variable frequency converter simulation method.

[0106] The preferred embodiments of the present disclosure are described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details in the above-described embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0107] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0108] Furthermore, any combination of various different embodiments of the present disclosure can also be made, as long as it does not deviate from the idea of the present disclosure, and it should also be considered as disclosed by the present disclosure.

Claims

1. A frequency converter simulation method, characterized in that, The method, applied to the start-up process of a gas turbine generator, includes: Establish separate models for the frequency converter, external control command interface, and generator interface. The external control command interface model serves as the input interface of the inverter model, enabling the inverter model to receive external control commands. The generator interface model serves as the output interface of the inverter model, used to connect the output of the inverter model to the stator of the generator. The inverter model responds to external control commands, driving the generator to change from a static state to a grid-connected power generation state; The inverter model responds to external control commands, driving the generator to change from a static state to a grid-connected power generation state, including: When the inverter model enters the shutdown state, the generator is driven by the gas turbine to the grid-connected speed and enters the grid-connected power generation state, and the gas turbine is connected to the generator; The speed calculation model for the generator when it is driven by a frequency converter is as follows: The calculation model for the generator speed when driven by a gas turbine is as follows: in: This is the current generator speed. This represents the generator's rotational speed at the previous moment. For the rate of increase, For the target speed, This is the per-unit value of the current generator speed. This represents the per-unit value of the generator's speed at the previous moment. To calculate the step size for the start-up, The damping coefficient is... This is the power conversion factor. is the time constant.

2. The method according to claim 1, characterized in that, The external control command includes at least one of the following: A start request control command is used to instruct the inverter model to output a first alternating current so that the generator enters a first target speed; The mode switching control command is used to instruct the inverter model to output a second alternating current so that the generator enters a second target speed; A high-speed hold request control command is used to instruct the inverter model to output a first constant voltage alternating current so that the generator maintains a second target speed and maintains a first duration. The high-speed hold-off control command is used to instruct the inverter model to stop output, so that the generator drops to the third target speed; A low-speed hold request control command is used to instruct the inverter model to output a second constant voltage alternating current so that the generator maintains the fourth target speed and maintains the second continuous cycle to start the gas turbine ignition; An acceleration start control command is used to instruct the inverter model to output a third alternating current so that the generator enters the fifth target speed; The inverter exit control command is used to instruct the inverter model to gradually reduce its output until it is disconnected from the generator, at which point the inverter model enters a shutdown state.

3. The method according to claim 2, characterized in that, The first alternating current is less than the second alternating current, and the second alternating current is less than the third alternating current.

4. The method according to claim 2, characterized in that, The first constant voltage alternating current is greater than the second constant voltage alternating current.

5. The method according to claim 2, characterized in that, The first duration period is longer than the second duration period.

6. The method according to claim 2, characterized in that, The first target speed is less than the third target speed, the third target speed is less than the fourth target speed, the fourth target speed is less than the second target speed, and the second target speed is less than the fifth target speed.

7. A frequency converter simulation system, characterized in that, The system includes: The generator, connected to the generator interface model, is configured as a system load. The inverter model is configured to respond to external control commands and drive the generator to change from a stationary state to a grid-connected power generation state. An external control command interface model is configured as the input interface of the inverter model for the inverter model to receive external control commands. A generator interface model is configured as the output interface of the inverter model for connecting the output of the inverter model to the stator of the generator. The system also includes a gas turbine connected to the generator, which is configured to drive the generator to grid-connected speed and enter grid-connected power generation state when the frequency converter model enters the shutdown state. The speed calculation model for the generator when it is driven by a frequency converter is as follows: The calculation model for the generator speed when driven by a gas turbine is as follows: in: This is the current generator speed. This represents the generator's rotational speed at the previous moment. For the rate of increase, For the target speed, This is the per-unit value of the current generator speed. This represents the per-unit value of the generator's speed at the previous moment. To calculate the step size for the start-up, The damping coefficient is... This is the power conversion factor. is the time constant.

8. An electronic device, characterized in that, include: A memory on which computer programs are stored; A processor for executing the computer program in the memory to implement the steps of the method according to any one of claims 1-6.

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