Starting deduction method and system for static variable-frequency starting device of gas turbine generator set

Abstract

The invention belongs to the technical field of static variable-frequency starting, and provides a starting deduction method and system for a static variable-frequency starting device of a gas turbine generator set, and the method comprises the steps: building a gas turbine generator model according to the parameters of the static variable-frequency starting device of the gas turbine generator set; based on the gas turbine generator model, constructing a white-box device-level model for describing a static variable-frequency starting device of the gas turbine generator set; constructing a control strategy for realizing power factor optimization by adjusting the excitation electromotive force of the motor, and forming a white-box control level model; and the white-box device-level model is controlled by the white-box control-level model, and starting deduction is realized by using the white-box control-level model and the white-box device-level model. According to the method, efficient and accurate SFC starting deduction of the gas turbine generator set can be realized, and important technical support is provided for links such as equipment specification research, electrical scheme design and operation mode formulation of the gas turbine generator set.

Description

Technical Field

[0001] This invention belongs to the field of static variable frequency start-up technology, specifically relating to a starting deduction method and system for a static variable frequency start-up device for a gas turbine generator set. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] With the transformation of the energy structure and the construction of new power systems, the installed capacity and penetration rate of new energy power plants such as wind power and photovoltaics continue to rise, and the power grid's demand for flexible resources with rapid adjustment capabilities is becoming increasingly urgent. Gas turbine generator sets, due to their advantages such as fast start-up, high efficiency, and low pollution, have shown significant technical advantages and broad application prospects in power grid peak shaving and frequency regulation.

[0004] To enhance the flexibility of power system operation, gas turbine generator sets undergo frequent start-up and shutdown. Therefore, the transient characteristics of the start-up process significantly impact equipment lifespan, station safety, and economic efficiency. In engineering practice, gas turbine generator set start-up processes may experience torque pulsation, mechanical resonance, equipment overheating, and low energy efficiency. To improve the starting performance of the units, heavy-duty gas turbine generator sets primarily utilize the SFC (Synchronous Variable Frequency Drive) technology. The gas turbine generator set starting system, with SFC as its core component, achieves smooth and safe start-up of the gas turbine by controlling speed and load. However, during SFC start-up, electromagnetic and electromechanical transients are coupled, resulting in complex time-varying characteristics of physical quantities such as starting power, rotor speed, and torque, making it susceptible to start-up failure due to external disturbances. Summary of the Invention

[0005] To address the aforementioned problems, this invention proposes a method and system for calculating the start-up of a static variable frequency starter (SFC) device for gas turbine generator sets. This invention enables efficient and accurate SFC start-up calculations for gas turbine generator sets, providing crucial technical support for equipment specification research, electrical scheme design, and operation mode formulation for gas turbine generator sets.

[0006] According to some embodiments, the present invention adopts the following technical solution: A starting simulation method for a static variable frequency starter for a gas turbine generator set includes the following steps: Based on the parameters of the static variable frequency starter of the gas turbine generator set, a gas turbine generator model is constructed. Based on the gas turbine generator model, a white-box device-level model is constructed to describe the static frequency conversion starting device of the gas turbine generator set; A control strategy for optimizing the power factor by adjusting the excitation electromotive force of the motor is constructed, forming a white-box control level model; The white-box device-level model is controlled by the white-box control-level model, and the startup simulation is realized by using the white-box control-level model and the white-box device-level model.

[0007] As an optional implementation, the specific content of the starting control strategy of the static variable frequency starter of the gas turbine generator set includes: Turning speed stage: Turning gear starts and speed is increased to the turning gear speed; the static frequency converter starter motor closes to establish and maintain rotor voltage; Sequential control stage: A start command is sent to the starter of the static variable frequency starter. The starter drives the gas turbine generator set to accelerate to the purging speed and executes the purging procedure on the gas turbine. To perform the ignition procedure for the gas turbine: reduce the current output of the starter to the generator stator to 0, reduce the gas turbine speed from the purging speed to the ignition speed, and perform the ignition operation.

[0008] The starter resumes current output to the generator stator, and under the combined action of the starter output power and the gas turbine's self-generated power, the gas turbine speed increases to the self-sustaining speed; Execute the tripping procedure for the gas turbine: The gas turbine speed continues to increase to the tripping speed, the starter trips, and the tripping is completed; Speed ​​regulation system control phase: Under the control of the speed regulation system, the unit speeds up to the operating speed and generates electricity by grid connection.

[0009] As an alternative implementation method, the process of constructing a gas turbine generator model based on the parameters of the static variable frequency starter of the gas turbine generator set includes: setting the rotor structure as a salient pole machine, setting the number of Q-axis damping windings to 2 to complete the setting of the salient pole machine type, and configuring an excitation system model oriented towards minimizing power supply capacity.

[0010] As a further implementation, during the configuration of the excitation system model aimed at minimizing power supply capacity, the reactive power reference value of the synchronous motor is used. Q ref Set to 0, calculate Q ref Deviation from reactive power measurement value Q e This deviation, after passing through the PI controller, generates an excitation voltage signal. E f .

[0011] As a further implementation, the excitation system model with minimized power supply capacity is suitable for simulation calculations to evaluate minimum starting performance requirements; when analyzing the characteristics under different operating conditions, the excitation system model with minimized power supply capacity is replaced with a white-box model of the actual exciter.

[0012] As an alternative implementation, the white-box device-level model includes 3 input signals and 6 electrical nodes. The input signal nodes represent voltage reference command arrays for different phases of the starter power supply, and the electrical nodes represent the output terminals of each phase of the starter for driving the motor, as well as the input terminals of each phase connected to the plant bus.

[0013] As a further implementation, each voltage reference instruction array contains reference instructions for phase, frequency, and amplitude.

[0014] As an alternative implementation, the white-box device-level model is configured to present a simplified topology of a three-phase controllable AC voltage source when clicked. The three-phase AC power supply is simulated by three controllable AC voltage sources. The voltage amplitude, voltage frequency, and voltage phase of the voltage sources are determined by a voltage reference command array and connected to the motor armature terminals through electrical nodes.

[0015] As an optional implementation, the control-level white-box model includes low-speed turning gear control, SFC starter control, and one-button start control model for gas turbine generator set. The low-speed turning gear control model is used to simulate the mechanical characteristics of the turning gear device. The input pins represent the rated speed of the turning gear device and the real-time speed of the gas turbine generator set, respectively; the output pins represent the output torque of the turning gear device. The SFC starter control model is used to simulate the data acquisition, status analysis, and command generation functions of the SFC control and protection system. It sends three-phase AC power phase, frequency, and voltage amplitude commands to the power circuit module, and simultaneously receives operating commands from the gas turbine generator set one-button start control white box model. Its input pins include operating mode, speed signal, torque signal, and motor status signal; the output pins are A, B, and C three-phase power control command arrays. The one-button start-up control model for gas turbine generator sets is used to simulate the one-button sequential control strategy for the automatic start-up process of gas turbine generator sets.

[0016] A starting simulation system for a static variable frequency starter for a gas turbine generator set includes: The gas turbine generator model building module is configured to build a gas turbine generator model based on the parameters of the static frequency conversion start device of the gas turbine generator set; The white-box device-level model building module is configured to build a white-box device-level model based on the gas turbine generator model to describe the static frequency conversion starting device of the gas turbine generator set. The white-box control-level model construction module is configured to construct a control strategy that optimizes the power factor by adjusting the excitation electromotive force of the motor, thus forming a white-box control-level model. The white-box device-level model is controlled by the white-box control-level model, and the start-up simulation is realized by using the white-box control-level model and the white-box device-level model.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) This invention proposes a modular programming method, which allows users to quickly build simulation software by selecting, loading, and connecting pre-developed circuit and control logic modules, thereby enabling simulation analysis and scheme evaluation. This invention significantly reduces the workload of model building and development, improves simulation efficiency, and provides strong decision support for users to conduct technical and economic performance comparison studies of gas turbine start-up schemes.

[0018] (2) By deduce the gas turbine start-up process, this invention can obtain detailed data on physical quantities such as speed, torque, voltage, current, mechanical power, electromagnetic power, and electrical energy, and can present them intuitively through curves, waveforms, etc. Users can carry out technical / economic performance index evaluation, electrical design, scheme comparison and optimization based on the above data.

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0020] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0021] Figure 1 This is an example of an excitation system model designed to minimize power supply capacity; Figure 2 This is a schematic diagram of a device-level white-box model of an embodiment of SFC; Figure 3 This is a simplified topology diagram of a three-phase controllable AC voltage source SFC power circuit according to one embodiment; Figure 4 This is a schematic diagram of a white-box model of a low-speed turning gear control stage according to one embodiment; Figure 5 This is a schematic diagram of the white-box model of the control stage of an SFC starter according to one embodiment; Figure 6This is a schematic diagram of a white-box control stage for one-button start-up of a gas turbine generator set according to one embodiment. Figure 7 This is a speed graph depicting the start-up simulation of a gas turbine in one embodiment; Figure 8 This is a torque graph representing a simulated gas turbine startup scenario. Figure 9 This is an image of the SFC starter output voltage in a gas turbine start-up simulation of one embodiment. Figure 10 This is an image of the SFC starter output frequency derived from the starting simulation of a gas turbine in one embodiment. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0024] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0025] Where there is no conflict, the embodiments and features described in this application may be combined with each other.

[0026] Example 1 The following is a definition of the terminology: Static Frequency Converter (SFC): A key control and starting device used during the gas turbine startup process to use a generator as a synchronous motor to drive the gas turbine rotor.

[0027] Rotating Magnetic Field (RMF): A dynamic magnetic field generated by the static variable frequency starter (SFC) outputting variable frequency alternating current to the stator windings of the generator, used to drive the gas turbine rotor to gradually increase speed from rest.

[0028] Incremental cost-effectiveness ratio (ICER): The ratio between the additional costs incurred to optimize the gas turbine start-up process and the resulting economic benefits. It is used to measure the economic feasibility of start-up optimization measures.

[0029] Self-Sustaining Speed ​​(SSS): The lowest speed threshold at which a gas turbine can maintain continuous rotor rotation on its own without requiring an external starting device to provide additional power.

[0030] Tripping Speed ​​(TS): The actual speed reached when the gas turbine and starter are disengaged.

[0031] Start-Up Acceleration Time (SUAT): The time required for a gas turbine to start up and accelerate to its operating speed (full speed idling) and be ready for grid connection and power generation.

[0032] This invention focuses on the starting problem of gas turbine generator sets and proposes a starting simulation method based on "white-box encapsulation + configuration modeling". First, it proposes a modular modeling method for the mechanical, electromechanical, and electromagnetic multi-physics fields of the gas turbine generator set, encapsulating the devices and control strategies within a "white-box model". This model allows designers to view, modify, edit, and drag-and-drop, significantly improving modeling efficiency and reducing the requirements for designers' knowledge and software skills. Second, through configuration modeling, differentiated "white-box models" are adapted and linked according to simulation needs to construct a simulation platform for the gas turbine generator set. This configuration modeling approach not only improves modeling efficiency but also significantly enhances the refinement of the simulation platform, ensuring the accuracy of the simulation results.

[0033] This invention effectively overcomes the shortcomings of conventional simulation methods in terms of efficiency, applicability, and support capabilities, and provides strong support for scenarios such as in-depth analysis of multi-physics transient characteristics during the start-up process of gas turbine generator sets, comparison and optimization of multiple start-up schemes, etc.

[0034] Starting Procedures for Heavy-Duty Gas Turbine Generator Sets Based on SFC Type Starter To reduce the large current surge during the starting process of gas turbine generator sets, SFC-type starters have been widely used. This invention uses the SFC-type starter as an example to illustrate the main steps of starting a heavy-duty gas turbine generator set.

[0035] The SFC starter, acting as the power source for the gas turbine generator set (operating in electric motor mode), possesses voltage and frequency regulation capabilities. By controlling the rectification and inversion processes, the SFC starter accelerates the gas turbine to above its self-sustaining speed. After the SFC starter disengages from the gas turbine generator set, the generator set, driven by its own power, eventually reaches its operating speed and becomes ready for grid connection. The specific steps are as follows: (1) Turning speed stage The turning gear starts and accelerates to the turning gear speed; the SFC type starter closes the circuit to establish and maintain the rotor voltage.

[0036] (2) Sequence control stage 2-1 Send a start command to the SFC type starter.

[0037] 2-2 The SFC type starter drives the gas turbine generator set, accelerating it to the purging speed (during this process, the turning gear disengages, and the automatic disengagement speed is tentatively set at 5 r / min). The purging speed is tentatively set at 0.25 pu, i.e., 750 r / min. 2-3 Perform a purging procedure on the gas turbine.

[0038] 2-4 Perform the ignition procedure for the gas turbine: Reduce the current output of the SFC starter to the generator stator to 0, and reduce the gas turbine speed from the purge speed to the ignition speed (typical value: 0.2 pu, i.e. 600 r / min); perform the ignition operation.

[0039] 2-5 The SFC type starter restores the current output to the generator stator. Under the combined action of the SFC type starter output power and the gas turbine self-generated power, the gas turbine speed increases to the self-sustaining speed (typical value: 0.5 pu, i.e. 1500 r / min).

[0040] 2-5 Execute the trip procedure for the gas turbine: The gas turbine speed continues to increase to the trip speed (typical value: 0.6 pu, i.e. 1800 r / min); the SFC type starter trips, completing the trip (except for the excitation system); under the action of the gas turbine's self-generated power, the unit continues to increase the speed to 0.95 pu, i.e. 2850 r / min.

[0041] (3) Speed ​​regulation system control stage: Under the control of the speed regulation system, the unit speeds up to the operating speed, i.e., 3000 r / min.

[0042] (4) Grid-connected power generation stage.

[0043] White-box packaging method for device-level and control-level components during the start-up process of heavy-duty gas turbine generator sets To accurately grasp the technical and economic characteristics of various starting schemes for heavy-duty gas turbine generator sets and improve the safety, economy, and flexibility of the starting process, this invention proposes an electromagnetic-electromechanical transient white-box packaging method for the starting process of heavy-duty gas turbine generator sets. Using the PSCAD-EMTDC 5.0.2 software environment as an example, this invention illustrates the main steps of the white-box packaging method for the starting process of heavy-duty gas turbine generator sets.

[0044] A Method for Constructing Device-Level White-Box Models Based on Equipment Specifications and Manufacturer Topologies Taking gas turbine generators (synchronous motors) and SFC starters as examples, this paper illustrates the device-level modeling method.

[0045] Unit-level white-box model of a gas turbine generator: First, in the PSCAD-EMTDC 5.0.2 software environment, a gas turbine generator model was constructed through parameter settings. The main settings include: (1) Set the rotor structure to a salient pole machine. In the PSCAD-EMTDC 5.0 software environment, the salient pole machine type is set by setting the number of Q-axis damping windings to 2.

[0046] (2) Configure an excitation system model oriented towards minimizing power supply capacity During the SFC starter drive phase, a unity power factor is set to reduce the demand on external capacity. In the simulation, power factor optimization is achieved by adjusting the motor's excitation electromotive force. The method for implementing the above control strategy in software is as follows: Figure 1 As shown.

[0047] Figure 1 In the middle, the reactive power reference value of the synchronous motor will be... Q ref Set to 0, calculate Q ref Compared with reactive power measurement value (i.e. Q out deviation Q e This deviation, after passing through the PI controller, generates an excitation voltage signal. E f Through the aforementioned closed-loop control, the reactive power consumed by the synchronous motor is adjusted to zero, thereby reducing the armature current and decreasing the power supply capacity requirement during startup. It should be noted that the excitation system model oriented towards minimizing power supply capacity is suitable for simulation calculations evaluating minimum starting performance requirements; when analyzing characteristics under different operating conditions, this model should be replaced with a white-box model of the actual exciter.

[0048] SFC starter device-level white-box model: This model is used to describe the characteristics of the SFC power circuit module and the function of the primary circuit. In this embodiment, it is named "SFC_01". Figure 2 As shown. This model accepts instructions from the control-level white-box model and provides the motor with electrical energy that meets the requirements (voltage, frequency, power, etc.).

[0049] like Figure 2 As shown, the pins of the SFC device-level white-box model include 3 input signals and 6 electrical nodes. The meaning of each pin is shown in Table 1.

[0050] Table 1 Pin Configuration and Meaning of SFC Device-Level White Box Model

[0051] Based on the actual needs of simulation and derivation, the SFC device-level white-box model can encapsulate different circuit topologies to expand the applicability of this invention. Common circuit topologies include 12-pulse rectification + 3-level inverter topologies and 12-pulse rectification + cascaded inverter topologies. Specifically, for situations where the circuit topology is unknown or to be determined, to meet the needs of rapid simulation and derivation, this invention designs a simplified topology for a three-phase controllable AC voltage source, enabling rapid simulation and derivation. The circuit diagram of this topology in the PSCAD-EMTDC5.0.2 software environment is shown below. Figure 3 As shown.

[0052] Clicking on the SFC device-level white-box model will display the interface shown in the image above. The three-phase AC power supply is simulated by three controllable AC voltage sources. The voltage amplitude (represented as "V" in the image), voltage frequency (represented as "F" in the image), and voltage phase (represented as "Ph" in the image) of these voltage sources are determined by the voltage reference command arrays ua_ref, ub_ref, and uc_ref, and are connected to the motor armature terminals via electrical terminals out_A, out_B, and out_C.

[0053] Control-level white-box model construction method for manufacturer-oriented strategies This invention constructs white-box models for control levels such as low-speed turning gear control, SFC starter control, and one-button start control of gas turbine generator sets.

[0054] Control-level white-box model for low-speed turning gear: Low-speed turning control white box model such as Figure 4 As shown.

[0055] This model simulates the mechanical characteristics of the turning gear, where the input pins speed_rated and speed_rotor_rad represent the rated speed of the turning gear and the real-time speed of the gas turbine generator set, respectively; the output pin torque_gear represents the output torque of the turning gear.

[0056] SFC starter control level white-box model: The white-box control level model of the SFC starter simulates the data acquisition, status analysis, and command generation functions of the SFC control and protection system. It sends commands regarding the phase, frequency, and voltage amplitude of the three-phase AC power supply to the power circuit module, while simultaneously receiving operating commands from the one-button start control white-box model of the gas turbine generator set. The control level white-box model of the SFC starter designed in this invention is named "CtrlSFC_01". Figure 5 As shown.

[0057] As shown in the figure above, the white-box model of the SFC starter's control level has four input pins, including operating mode, speed signal, torque signal, and motor status signal; and three output pins, namely the A, B, and C three-phase power supply control command arrays. The values ​​and meanings of the input and output signals are shown in Table 2.

[0058] Table 2 Pin Configuration and Meaning of the Control Level White Box Model of SFC Starter

[0059] White-box control stage model for one-button start of gas turbine generator set: The white-box control level model for one-button start-up of the gas turbine generator set designed in this invention is used to simulate the one-button sequential control strategy of the automatic start-up process of the gas turbine generator set shown in Table 3.

[0060] Table 3

[0061] The white-box model of the control level for one-button start of a gas turbine generator set is as follows: Figure 6 As shown.

[0062] Key data images obtained based on the design method of this invention are as follows: Figures 7-10 As shown, this invention, through the deduction of the gas turbine start-up process, can obtain detailed data on physical quantities such as speed, torque, voltage, current, mechanical power, electromagnetic power, and electrical energy, and can present them intuitively through curves, waveforms, and other methods.

[0063] Example 2 A starting simulation system for a static variable frequency starter for a gas turbine generator set includes: The gas turbine generator model building module is configured to build a gas turbine generator model based on the parameters of the static frequency conversion start device of the gas turbine generator set; The white-box device-level model building module is configured to build a white-box device-level model based on the gas turbine generator model to describe the static frequency conversion starting device of the gas turbine generator set. The white-box control-level model construction module is configured to construct a control strategy that optimizes the power factor by adjusting the excitation electromotive force of the motor, thus forming a white-box control-level model. The white-box device-level model is controlled by the white-box control-level model, and the start-up simulation is realized by using the white-box control-level model and the white-box device-level model.

[0064] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of one or more computer-usable storage media (including, but not limited to, disk storage, etc.) containing computer-usable program code. CD - ROM It takes the form of a computer program product implemented on (such as optical memory, etc.).

[0065] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0066] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0067] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0068] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made by those skilled in the art without creative effort within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A starting deduction method for a static variable frequency starter for a gas turbine generator set, characterized in that, Includes the following steps: Based on the parameters of the static variable frequency starter of the gas turbine generator set, a gas turbine generator model is constructed. Based on the gas turbine generator model, a white-box device-level model is constructed to describe the static frequency conversion starting device of the gas turbine generator set; A control strategy for optimizing the power factor by adjusting the excitation electromotive force of the motor is constructed, forming a white-box control level model; The white-box device-level model is controlled by the white-box control-level model, and the startup simulation is realized by using the white-box control-level model and the white-box device-level model.

2. The starting deduction method for a static variable frequency starter for a gas turbine generator set as described in claim 1, characterized in that, The specific details of the starting control strategy for the static frequency conversion starting device of the gas turbine generator set include: Turning speed stage: Turning gear starts and speed is increased to the turning gear speed; the static frequency converter starter motor closes to establish and maintain rotor voltage; Sequential control stage: A start command is sent to the starter of the static variable frequency starter. The starter drives the gas turbine generator set to accelerate to the purging speed and executes the purging procedure on the gas turbine. To perform the ignition procedure for the gas turbine: reduce the current output of the starter to the generator stator to 0, reduce the gas turbine speed from the purging speed to the ignition speed, and perform the ignition operation. The starter resumes current output to the generator stator, and under the combined action of the starter output power and the gas turbine's self-generated power, the gas turbine speed increases to the self-sustaining speed; Execute the tripping procedure for the gas turbine: The gas turbine speed continues to increase to the tripping speed, the starter trips, and the tripping is completed; Speed ​​regulation system control phase: Under the control of the speed regulation system, the unit speeds up to the operating speed and generates electricity by grid connection.

3. The starting deduction method for a static variable frequency starter for a gas turbine generator set as described in claim 1, characterized in that, Based on the parameters of the static variable frequency starter of the gas turbine generator set, the process of constructing the gas turbine generator model includes: setting the rotor structure as a salient pole machine, setting the number of Q-axis damping windings to 2 to complete the setting of the salient pole machine type, and configuring the excitation system model oriented towards minimizing power supply capacity.

4. The starting deduction method for a static variable frequency starter for a gas turbine generator set as described in claim 3, characterized in that, In configuring the excitation system model for minimizing power supply capacity, the reactive power reference value of the synchronous motor is used. Q ref Set to 0, calculate Q ref Deviation from reactive power measurement value Q e This deviation, after passing through the PI controller, generates an excitation voltage signal. E f .

5. The starting deduction method for a static variable frequency starter for a gas turbine generator set as described in claim 4, characterized in that, The excitation system model oriented towards minimizing power supply capacity is suitable for simulation calculations to evaluate minimum starting performance requirements. When analyzing the characteristics under different operating conditions, the excitation system model with minimized power supply capacity is replaced with a white-box model of the actual exciter.

6. The starting deduction method for a static variable frequency starter for a gas turbine generator set as described in claim 1, characterized in that, The white-box device-level model includes 3 input signals and 6 electrical nodes. The input signal nodes represent voltage reference command arrays for different phases of the starter power supply, and the electrical nodes represent the output terminals of each phase of the starter, used to drive the motor, and the input terminals of each phase, which are connected to the plant bus.

7. The starting deduction method for a static variable frequency starter for a gas turbine generator set as described in claim 6, characterized in that, Each voltage reference instruction array contains reference instructions for phase, frequency, and amplitude.

8. The starting deduction method for a static variable frequency starter for a gas turbine generator set as described in claim 1, characterized in that, The white-box device-level model is configured to present the simplest topology of a three-phase controllable AC voltage source when clicked. The three-phase AC power supply is simulated by three controllable AC voltage sources. The voltage amplitude, voltage frequency, and voltage phase of the voltage sources are determined by a voltage reference command array and are connected to the motor armature terminals through electrical nodes.

9. The starting deduction method for a static variable frequency starter for a gas turbine generator set as described in claim 1, characterized in that, The control-level white-box model includes low-speed turning gear control, SFC starter control, and one-button start control model for gas turbine generator set. The low-speed turning gear control model is used to simulate the mechanical characteristics of the turning gear device. The input pins represent the rated speed of the turning gear device and the real-time speed of the gas turbine generator set, respectively; the output pins represent the output torque of the turning gear device. The SFC starter control model is used to simulate the data acquisition, status analysis, and command generation functions of the SFC control and protection system. It sends three-phase AC power phase, frequency, and voltage amplitude commands to the power circuit module, and simultaneously receives operating commands from the gas turbine generator set one-button start control white box model. Its input pins include operating mode, speed signal, torque signal, and motor status signal; the output pins are A, B, and C three-phase power control command arrays. The one-button start-up control model for gas turbine generator sets is used to simulate the one-button sequential control strategy for the automatic start-up process of gas turbine generator sets.

10. A starting simulation system for a static variable frequency starter for a gas turbine generator set, characterized in that, include: The gas turbine generator model building module is configured to build a gas turbine generator model based on the parameters of the static frequency conversion start device of the gas turbine generator set; The white-box device-level model building module is configured to build a white-box device-level model based on the gas turbine generator model to describe the static frequency conversion starting device of the gas turbine generator set. The white-box control-level model construction module is configured to construct a control strategy that optimizes the power factor by adjusting the excitation electromotive force of the motor, thus forming a white-box control-level model. The white-box device-level model is controlled by the white-box control-level model, and the start-up simulation is realized by using the white-box control-level model and the white-box device-level model.

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