A method, device and system for setting a swing reactance parameter of an excitation regulator

Abstract

The application discloses a parameter setting method, device and system for a swing reactance of an excitation regulator, wherein the parameter setting method adds forced oscillation to a speed regulator link in a closed-loop simulation test environment, so as to stimulate equal-amplitude oscillation of mechanical power and unit frequency in a set frequency range; the error between a real signal value output by a real excitation device and a simulation signal value output by a simulation test model is calculated, the initial value of the swing reactance parameter is selected according to the error, the adaptability and effectiveness of the swing reactance are verified based on the initial value, the test result is obtained through a voltage step test under a set working condition, and the swing reactance parameter is modified according to the test result, so that the active power fluctuation when the PSS is put into operation meets the set condition. The parameter setting method provided by the application can reduce the risk of power oscillation accidents caused by large unit speed calculation error due to unreasonable swing reactance parameter setting and weak damping or even negative damping of the PSS.

Description

Technical Field

[0001] This invention belongs to the field of power system model parameter tuning technology, and particularly relates to a method, device and system for tuning the swing reactance parameters of an excitation regulator. Background Technology

[0002] The sway reactance is the changing reactance generated during the generator rotor swaying process when the system experiences fluctuations or the prime mover power adjusts. Its value is less than the generator's steady-state quadrature-axis reactance but greater than its transient quadrature-axis reactance. In the PSS2A / 2B excitation regulator model, the sway reactance is a crucial parameter. The rationality and effectiveness of its value directly affect the accuracy and effectiveness of the unit speed calculation, thus influencing the damping effect of the PSS at different frequency bands to varying degrees.

[0003] The effective and reasonable value of the swing reactor is closely related to several factors, including unit parameters, unit operating conditions, and the oscillation frequency band involved. Currently, power plants generally use the manufacturer's default swing reactor parameters, which poses a risk of causing unit oscillation accidents. In actual operation, there have been instances where, under changing operating conditions (such as low load or leading phase operation), unreasonable swing reactor parameter settings have led to large errors in unit speed calculations, resulting in weak or even negative damping of the power supply oscillation (PSS) and causing power oscillation events.

[0004] Meanwhile, in actual field conditions, there are problems such as the inability to verify the oscillation modes in different frequency bands from 0.2 to 2 Hz, and frequent and complex changes in operating conditions that pose significant risks. Summary of the Invention

[0005] Based on this, the present invention aims to provide a method, apparatus and system for setting the swing reactance parameter of an excitation regulator, so as to at least solve the aforementioned technical problems.

[0006] In a first aspect, the present invention proposes a method for tuning the swing reactance parameters of an excitation regulator, comprising:

[0007] A closed-loop simulation test model is constructed, which includes an excitation simulation component and is connected to a real excitation device.

[0008] Under the condition of not engaging PSS, forced oscillation is added to the speed regulator stage of the closed-loop simulation test model to obtain the real output value of the real excitation device and the simulation output value of the excitation simulation component, and the error between the real output value and the simulation output value is calculated.

[0009] The initial values ​​of the swing reactance parameters are determined based on the error.

[0010] Based on the initial values, a voltage step test was conducted under set operating conditions to obtain the test results. The swing reactance parameters were then modified according to the test results so that the active power fluctuation when the PSS was put into operation met the set conditions.

[0011] Furthermore, the error between the actual output value and the simulated output value is calculated as follows:

[0012] Obtain the calculated angular velocity value output by the actual excitation device, and the simulated angular velocity value output by the excitation simulation device;

[0013] The error between the calculated angular velocity value and the simulated angular velocity value is calculated.

[0014] Furthermore, determining the initial values ​​of the swing reactance parameters based on the error includes:

[0015] The initial value is the swing reactance setpoint for the test condition where the error meets the set conditions.

[0016] The setting condition is that the frequency band error of the main modes of the regional oscillation and the local oscillation is less than the set value.

[0017] Furthermore, the above method also includes:

[0018] Verify the consistency of the PSS dual-input model parameters in the real excitation device and the excitation simulation component.

[0019] Furthermore, verifying the consistency of the PSS dual-input model parameters in the actual excitation device and the excitation simulation component includes:

[0020] Disconnect the rotational speed input branch in the PSS dual-input model and convert the PSS dual-input model into a PSS single-input model;

[0021] The first active dynamic response of the real excitation device and the excitation simulation device were obtained under a given voltage step.

[0022] The consistency of the control characteristics of the PSS single-input model in the real excitation device and the excitation simulation component is verified based on the first active dynamic response.

[0023] The PSS dual-input model is applied to the real excitation device and the excitation simulation device, and the second active dynamic response of the real excitation device and the excitation simulation device is obtained under the given voltage step.

[0024] The consistency of the control characteristics of the PSS dual-input model in the real excitation device and the excitation simulation component is verified based on the second active dynamic response.

[0025] Furthermore, the test results obtained from voltage step tests conducted under set operating conditions based on initial values ​​include:

[0026] Based on the initial values, voltage step tests were conducted under the first operating condition with and without PSS, and the first engine load step response results with and without PSS were obtained respectively.

[0027] The first operating condition is that the generator's active power is slightly greater than the active power threshold value for automatic PSS activation, and the generator's reactive power is close to 0.

[0028] Furthermore, the test results obtained by conducting voltage step tests under set operating conditions based on initial values ​​also include:

[0029] Based on the initial values, voltage step tests were conducted under the second operating condition with and without PSS, and the load step response results of the second engine with and without PSS were obtained respectively.

[0030] The second operating condition is that the generator's active power is ≥ 60% of the rated active power, and the generator's reactive power is < 10% of the rated reactive power.

[0031] In a second aspect, the present invention provides a device for setting the swing reactance parameter of an excitation regulator, comprising:

[0032] The simulation model building unit is configured to build a closed-loop simulation test model, which includes an excitation simulation component and is connected to a real excitation device.

[0033] The simulation test unit is configured to add forced oscillation to the speed regulator stage of the closed-loop simulation test model under the condition that PSS is not put into operation, to obtain the real output value of the real excitation device and the simulation output value of the excitation simulation component, and to calculate the error between the real output value and the simulation output value.

[0034] The parameter initialization unit is configured to determine the initial value of the swing reactance parameter based on the error;

[0035] The parameter tuning unit is configured to perform a voltage step test under set operating conditions based on initial values ​​to obtain test results, and modify the swing reactance parameters according to the test results so that the active power fluctuation when the PSS is put into operation meets the set conditions.

[0036] Thirdly, the present invention provides a system for tuning the swing reactance parameters of an excitation regulator, comprising: a memory and a processor;

[0037] The memory is used to store programs;

[0038] The processor is configured to invoke a program stored in the memory to execute the excitation regulator swing reactance parameter tuning method provided in any possible implementation of the first aspect embodiment and / or in combination with the first aspect embodiment.

[0039] Fourthly, the present invention also provides a readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the excitation regulator swing reactance parameter tuning method provided in any possible implementation of the first aspect embodiment and / or in combination with the first aspect embodiment.

[0040] As can be seen from the above technical solutions, the present invention has the following beneficial effects:

[0041] This invention discloses a method, apparatus, and system for tuning the swing reactor parameters of an excitation regulator. The tuning method involves introducing forced oscillation into the speed governor stage within a closed-loop simulation test environment. This induces constant-amplitude oscillations in the mechanical power and unit frequency within a set frequency band. The error between the actual signal value output by the real excitation device and the simulated signal value output by the simulation test model is calculated. Based on this error, an initial value for the swing reactor parameters is selected. The adaptability and effectiveness of the swing reactor are verified based on the initial value. Under different operating conditions, the swing reactor parameters are modified through voltage step tests to ensure that the active power fluctuations under the test conditions with PSS (Power Supply System) energized meet the set conditions. The parameter tuning method provided by this invention has advantages such as simple oscillation frequency band switching, flexible operating condition switching, and comprehensive and efficient testing. It can reduce the risk of large unit speed calculation errors and power oscillation accidents caused by weak or even negative damping of the PSS due to unreasonable swing reactor parameter settings. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0043] Figure 1 This is a flowchart illustrating a method for setting the swing reactance parameter of an excitation regulator according to an embodiment of the present invention.

[0044] Figure 2 This is a schematic diagram of the closed-loop simulation test environment for the excitation regulator based on ADPSS provided in an embodiment of the present invention;

[0045] Figure 3 (a)~ Figure 3 (d) is a comparison between the calculated angular velocity output by the AVR device and the simulated angular velocity output by the AVR model when the swing reactance of the excitation regulator provided in this embodiment of the invention is 0.3;

[0046] Figure 4 (a)~ Figure 4 (d) is a comparison between the calculated angular velocity output by the AVR device and the simulated angular velocity output by the AVR model when the swing reactance of the excitation regulator is 0.4 according to the embodiment of the present invention.

[0047] Figure 5 (a)~ Figure 5(d) is a comparison between the calculated angular velocity output by the AVR device and the simulated angular velocity output by the AVR model when the swing reactance of the excitation regulator provided in this embodiment of the invention is 0.55;

[0048] Figure 6 This is a schematic diagram of the PSS2B mathematical model provided in an embodiment of the present invention;

[0049] Figure 7 This is a schematic diagram of the structure of the excitation regulator swing reactance parameter setting device provided in an embodiment of the present invention;

[0050] Figure 8 This is an electronic device architecture diagram provided for an embodiment of the present invention. Detailed Implementation

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] A Power System Stabilizer (PSS) is an additional excitation control technology developed to suppress low-frequency oscillations. The output signal of the PSS is typically superimposed on the voltage summing point of the Automatic Voltage Regulator (AVR). It introduces an additional signal into the AVR that leads the shaft speed, generating a positive damping torque to overcome the negative damping torque generated in the original excitation voltage regulator. This improves power system damping and addresses low-frequency oscillations, making it a crucial measure for enhancing the dynamic stability of power systems. The PSS extracts signals related to this oscillation, such as generator active power, speed, or frequency, processes them, and adds the resulting additional signal to the excitation regulator, causing the generator to produce an additional torque that dampens low-frequency oscillations.

[0053] Different PSS models can be classified based on their inputs. IEEE classifies PSS into PSS1A, PSS2A / 2B, PSS3B, and PSS4B models. PSS1A is a single-input model, typically using generator speed, frequency, or power as the input signal. PSS2A / 2B and PSS3B models are dual-input models. PSS4B is a multi-band model that uses speed as the input.

[0054] The present invention illustrates a method, apparatus, and system for tuning the swing reactance parameters of an excitation regulator through the following embodiments, which tunes the parameters of the swing reactance in an AVR to determine its preferred value, thereby satisfying the rationality and effectiveness of parameter selection.

[0055] See Figure 1 An embodiment of the present invention provides a method for tuning the swing reactance parameter of an excitation regulator, comprising the following steps:

[0056] Step S11. Construct a closed-loop simulation test model, which includes an excitation simulation component and is connected to a real excitation device.

[0057] Specifically, the closed-loop simulation test model mainly includes the generator and its excitation and speed control system, step-up transformer, transmission line, and equivalent infinite power supply. By integrating a real excitation device into the model, the generator can transmit simulated signals to the real excitation device in real time, and the real excitation device can feed back excitation adjustment signals to the simulation test model in real time. The excitation power unit then controls the relevant parameters of the generator, forming a closed-loop test environment. When the field parameters of the real excitation device and the model parameters of the excitation simulation component are consistent, the performance of the entire excitation system and the effectiveness of the model can be tested through closed-loop operation of the model.

[0058] For example, a closed-loop simulation test model can be built using an Advanced Digital Power System Simulator (ADPSS).

[0059] In some instances, such as Figure 2 The diagram illustrates a closed-loop simulation test model built using ADPSS, including an AVR model, an excitation power unit, a generator model, and a governor model. The actual excitation device, i.e., the AVR device, is connected to the closed-loop simulation test model. The simulated voltage / current signals of the generator stator / rotor, generated by the ADPSS simulation, are transmitted to the AVR device in real time via a power amplifier. The AVR device then transmits the excitation regulation signals (usually control angle α or cosα or control voltage U) to the AVR device. c The data is fed back to the test model in real time, and then controlled by the excitation power unit to control the generator's rotor voltage U. f This forms a closed-loop test environment, and the simulation test model also outputs electromagnetic power and rotor angular velocity to the waveform recording device for comparative analysis of the swing reactance closed-loop test results.

[0060] Step S12. Under the condition of not engaging PSS, add forced oscillation to the speed regulator stage of the closed-loop simulation test model, obtain the actual output value of the real excitation device and the simulation output value of the excitation simulation component, and calculate the error between the actual output value and the simulation output value.

[0061] Step S13. Determine the initial value of the swing reactance parameter based on the error.

[0062] Specifically, forced oscillation (FO) in power systems is usually caused by continuous periodic disturbances, characterized by rapid onset, large oscillation amplitude, and long duration. Forced oscillation is added to the governor stage of the simulation test model to excite constant amplitude oscillations of mechanical power and unit frequency in a set frequency band. The difference between the actual excitation device output value and the ADPSS simulation value is calculated. Within the main modes of regional oscillation and local oscillation, the initial value of the swing reactance parameter is selected based on the principle of minimizing the comprehensive error.

[0063] In some examples, considering that the operating range of PSS is generally 0.2 to 2 Hz, but forced oscillations below 0.5 Hz are difficult to excite, the excitation frequency band of forced oscillation is taken as 0.5 to 2 Hz.

[0064] In some examples, the test condition is set as 50% rated load of the generator, with the AVR not using the PSS function. Several different values ​​of swing reactance parameters are initially given. Forced oscillation is added to the governor stage of the closed-loop simulation test model to excite constant amplitude oscillations of mechanical power and unit frequency in the range of 0.5 to 2 Hz. The calculated angular velocity values ​​of the actual excitation device output and the simulated angular velocity values ​​of the excitation simulation device output are obtained for the test conditions corresponding to different values ​​of swing reactance parameters. The angular velocity error corresponding to different given values ​​of swing reactance parameters is calculated. The given value of the swing reactance parameter set for the test condition whose error meets the set conditions is selected as the initial value.

[0065] For example, with Figure 2 Taking the simulation environment shown as an example, Figures 3-5 This shows one example of parameter initialization. Figures 3-5 Black curves represent the calculated angular velocity values ​​output by the AVR device, while gray curves represent the simulated angular velocity values ​​output by the AVR model. Figure 3 (a)~ Figure 3 (d) illustrates the comparison between the calculated angular velocity output by the AVR device and the simulated angular velocity output by the AVR model at frequencies of 0.5Hz, 1Hz, 1.5Hz, and 2Hz when the given value of the swing reactance is 0.3. Figure 4 (a)~ Figure 4 (d) illustrates the comparison between the calculated angular velocity output by the AVR device and the simulated angular velocity output by the AVR model at frequencies of 0.5Hz, 1Hz, 1.5Hz, and 2Hz when the given value of the swing reactance is 0.4. Figure 5 (a)~ Figure 5(d) illustrates the comparison between the calculated and simulated angular velocities output by the AVR device at frequencies of 0.4Hz, 1Hz, 1.5Hz, and 2Hz when the swing reactance is set to 0.55. It can be seen that when the swing reactance is 0.3 or 0.4, the calculated and simulated angular velocities for the 0.5–2Hz oscillation range differ significantly. When the swing reactance is 0.55, the difference between the calculated and simulated angular velocities is slightly larger at the high-frequency 2Hz range. However, in the 0.4–1.5Hz frequency band, which is the main mode of regional oscillation and local oscillation, the overall error is already very small. Therefore, the initial value of the swing reactance is set to 0.55.

[0066] Step S14. Based on the initial values, conduct a voltage step test under the set operating conditions to obtain the test results. Modify the swing reactance parameters according to the test results so that the active power fluctuation when the PSS is put into operation meets the set conditions.

[0067] Specifically, under the same fluctuation, the accuracy of the speed change is affected by the unit's operating conditions. The lower the active power of the unit and the deeper the reactive power advance, the larger the calculated value of the speed change will be, and the greater the deviation from the actual speed change will be. Therefore, the effectiveness of the sway reactor parameter in suppressing low-frequency oscillations under different operating conditions needs to be verified, and the sway reactor parameter should be modified to better meet the operating conditions based on the verification results.

[0068] In some examples, the operating condition is set as a low-load condition, that is, the generator active power is slightly greater than the active power threshold value for automatic PSS activation, and the reactive power should be close to 0. Under the low-load condition, different oscillation modes at 0.2 to 2 Hz are excited by voltage step test, and the results of generator load step response with and without PSS are compared. The swing reactance parameter is modified so that the active power fluctuation damping ratio with PSS meets the requirements of relevant industry standards for PSS setting test.

[0069] It is understandable that when the swing reactance parameters meet the requirements of low-load conditions, they usually also meet the requirements of high-load conditions. In some examples, the adaptability and effectiveness of the swing reactance parameters under high-load conditions can also be tested.

[0070] For example, in addition to testing the adaptability and effectiveness of the swing reactance parameters under low load conditions, the test is also conducted under high load conditions, i.e., the generator active power is ≥ 60% of the rated active power and the generator reactive power is < 10% of the rated reactive power.

[0071] In some examples, parameter tuning under heavy load conditions involves the following process:

[0072] Step S141. Conduct a small step voltage test without PSS. If the active power fluctuation is not obvious, the step value should be increased before conducting the test. For units connected over long distances, power oscillation should be prevented during the test.

[0073] Step S142. Conduct a voltage step test with PSS under the same step amount, and compare the generator load step response results with and without PSS. The damping ratio should meet the relevant industry standards. If the damping ratio does not meet the requirements, increase the swing reactance parameter according to the set step size.

[0074] Step S143. Modify the unit's inertial time constant or the length of the line connected to the system, stimulate different oscillation modes at 0.2 to 2 Hz, and repeat the voltage step test in steps S141 to S142 until the damping ratio of the generator load step response with and without PSS meets the relevant industry standards.

[0075] In some examples, both high-load and low-load conditions were tested, and the parameter tuning under the low-load condition involved the following process:

[0076] Step S144. Activate PSS to reduce the generator excitation current, thereby reducing the generator potential and causing the generator to begin leading phase. During the test, the leading phase depth should not be less than 80% of the unit's leading phase reactive power limit, but should not exceed the low excitation limit value. During this process, attention should be paid to whether the unit experiences active power oscillation. If oscillation occurs, the swing reactance parameter should be appropriately reduced.

[0077] Step S145. Conduct a voltage step test with PSS under the same step amount as the high load condition, compare the generator load step response results under the simulated PSS model and the actual PSS model, and observe the Ks1× acceleration power link in the PSS model. If the fluctuation value is large, the swing reactance value should be appropriately reduced. It should be ensured that the actual PSS model's suppression effect on low-frequency oscillations under deep phase advance conditions meets the relevant industry standards, and at the same time, it should be as close as possible to the effect of the simulated PSS model.

[0078] Step S146. Modify the unit's inertial time constant or the length of the line connected to the system, stimulate different oscillation modes at 0.2 to 2 Hz, and repeat the voltage step test in steps S144 to S145 until the damping ratio of the generator load step response with and without PSS meets the relevant industry standards.

[0079] In some examples, the voltage step test involves a step change in voltage within ±4% of the given terminal voltage to obtain the unit's electromagnetic power response.

[0080] In some examples, the step size for adjusting the swing reactance parameter is 0.05.

[0081] In some examples, the relevant industry standard refers to the load step test evaluation criteria in DL / T 1231-2018 "Guidelines for Setting Tests of Power System Stabilizers," which states that the damping ratio of the load step response with PSS should be significantly higher than that without PSS, specifically, the damping ratio of the load step response with PSS should be greater than 0.1. "Significantly higher" means that when the damping ratio of the load step response without PSS is greater than 0.1, the damping ratio of the load step response with PSS should be at least 0.05 higher than the former; conversely, if the damping ratio of the load step response without PSS is less than 0.1, the damping ratio of the load step response with PSS should be at least 0.1 higher than the former.

[0082] In some examples, the above parameter tuning method also includes verifying the consistency of the PSS dual-input model parameters in the actual excitation device and the excitation simulation device. This process may include the following steps:

[0083] Disconnect the rotational speed input branch in the PSS dual-input model and convert the PSS dual-input model into a PSS single-input model.

[0084] The first active dynamic response of the real excitation device and the excitation simulation device were obtained under a given voltage step.

[0085] The consistency of the control characteristics of the PSS single-input model in the real excitation device and the excitation simulation component is verified based on the first active dynamic response.

[0086] The PSS dual-input model is applied to the real excitation device and the excitation simulation device, and the second active dynamic response of the real excitation device and the excitation simulation device is obtained under the given voltage step.

[0087] The consistency of the control characteristics of the PSS dual-input model in the real excitation device and the excitation simulation component is verified based on the second active dynamic response.

[0088] For example, Figure 6 One example of a PSS2A / 2B dual-input model was demonstrated. During the experiment, the rationality of the PSS1A stage was first tested, i.e., disconnecting it... Figure 6 The TP5 branch, as shown in the diagram, transforms the PSS2A / 2B model into the PSS1A model, i.e., the single-power input model. The active power dynamic response of the AVR model and the AVR device under a voltage step change is observed to verify whether the simulated PSS1A control characteristics are consistent with the actual device. After confirming the rationality of the PSS1A stage, PSS2A / 2B is then introduced, and the above process is repeated to verify the complete PSS2A / 2B stage model and parameters of the AVR device. The active power dynamic response of the AVR model and the AVR device under a voltage step change is observed. If they are consistent, it indicates that the AVR's PSS2A / 2B model is correct.

[0089] In some examples, the parameter tuning method described above also includes verifying the AVR main loop model before verifying the consistency of the PSS dual-input model parameters.

[0090] Specifically, to test the PSS control loop of the excitation device based on simulation results, it is first necessary to confirm that the input / output signal ratios and interface settings of the actual excitation device and ADPSS are correct. Based on the power plant unit excitation system parameter test report and manufacturer's data, an AVR main loop simulation model is built in the ADPSS. By observing the response characteristics of the generator load step test, the consistency between the simulated AVR model and the actual AVR device is verified, thereby confirming the correctness of the excitation device signal ratios and interface settings.

[0091] The above embodiments of the present invention disclose a method for tuning the swing reactor parameters of an excitation regulator, which features simple oscillation frequency band switching, flexible operating condition switching, and comprehensive and efficient testing. It is a feasible means to conduct unit swing reactor parameter testing and optimization. Using the embodiments provided by the present invention can reduce the risk of large errors in unit speed calculation and power oscillation accidents caused by weak or even negative damping of the PSS due to unreasonable swing reactor parameter settings.

[0092] The above-disclosed embodiments describe in detail a method for setting the swing reactance parameter of an excitation regulator. The above-disclosed method can be implemented using various types of equipment. Therefore, the present invention also discloses a device for setting the swing reactance parameter of an excitation regulator corresponding to the above method. Specific embodiments are given below for detailed description.

[0093] like Figure 7 As shown, one embodiment of the present invention provides an excitation regulator swing reactance parameter setting device 700, comprising:

[0094] The simulation model building unit 710 is configured to build a closed-loop simulation test model, which includes an excitation simulation component and is connected to a real excitation device.

[0095] The simulation test unit 720 is configured to add forced oscillation to the speed regulator stage of the closed-loop simulation test model under the condition that PSS is not engaged, to obtain the real output value of the real excitation device and the simulation output value of the excitation simulation component, and to calculate the error between the real output value and the simulation output value.

[0096] The parameter initialization unit 730 is configured to determine the initial value of the swing reactance parameter based on the error.

[0097] The parameter tuning unit 740 is configured to perform a voltage step test under set operating conditions based on initial values ​​to obtain test results, and modify the swing reactance parameters according to the load step response results so that the active power fluctuation when the PSS is put into operation meets the set conditions.

[0098] The excitation regulator swing reactance parameter setting device 700 provided in this application embodiment has the same implementation principle and technical effect as the aforementioned method embodiment. For the sake of brevity, any parts not mentioned in the device embodiment can be referred to the corresponding content in the aforementioned method embodiment.

[0099] See Figure 8 It shows a hardware structure block diagram of an electronic device, including: at least one processor 1, at least one communication interface 2, at least one memory 3 and at least one communication bus 4;

[0100] In this embodiment of the application, the number of processor 1, communication interface 2, memory 3, and communication bus 4 is at least one, and processor 1, communication interface 2, and memory 3 communicate with each other through communication bus 4;

[0101] Processor 1 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention.

[0102] Memory 3 may include high-speed RAM, and may also include non-volatile memory, such as at least one disk storage device;

[0103] The memory stores a program, which the processor can call. The program is used to implement the various processing steps of the aforementioned parameter tuning method.

[0104] This invention also provides a readable storage medium storing a computer program thereon, which, when executed by a processor, implements the parameter tuning method provided in any possible implementation of the above embodiments and / or in combination with the embodiments.

[0105] It should be understood that although the steps in the accompanying figures are shown sequentially as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise expressly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some of the steps in the accompanying figures may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.

[0106] Those skilled in the art will understand that the structures shown in the figures are merely block diagrams of some structures related to the present application and do not constitute a limitation on the terminal device to which the present application is applied. Specific terminal devices may include more or fewer components than those shown in the figures, or combine certain components, or have different component arrangements.

[0107] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0108] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0109] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for setting the swing reactance parameter of an excitation regulator, characterized in that, include: A closed-loop simulation test model is constructed, which includes an excitation simulation component and a real excitation device is connected to the closed-loop simulation test model. Under the condition of not engaging PSS, forced oscillation is added to the speed regulator stage of the closed-loop simulation test model to obtain the actual output value of the real excitation device and the simulation output value of the excitation simulation component, and the error between the actual output value and the simulation output value is calculated. The initial value of the swing reactance parameter is determined based on the error. Based on the initial value, a voltage step test is conducted under the set operating conditions to obtain the test results. The swing reactance parameter is modified according to the test results so that the active power fluctuation when the PSS is put into operation meets the first set condition. The process of determining the initial value of the swing reactance parameter based on the error includes: The initial value is determined for the swing reactance setpoint of the test condition corresponding to the error satisfying the second set condition. The second setting condition is that the frequency band error of the main modes of the regional oscillation and the local oscillation is less than a set value; The test results obtained by conducting a voltage step test under set operating conditions based on the initial value include: Based on the initial values, voltage step tests were conducted under the first operating condition with and without PSS, and the first generator load step response results with and without PSS were obtained respectively. The first operating condition is that the generator's active power is slightly greater than the active power threshold value for automatic PSS activation, and the generator's reactive power is close to 0. The method of obtaining test results by conducting a voltage step test under set operating conditions based on the initial value also includes: Based on the initial values, voltage step tests were conducted under the second operating condition with and without PSS, and the load step response results of the second generator with and without PSS were obtained respectively. The second operating condition is that the generator's active power is ≥ 60% of the rated active power, and the generator's reactive power is < 10% of the rated reactive power.

2. The parameter tuning method according to claim 1, characterized in that, The calculation of the error between the actual output value and the simulation output value includes: Obtain the calculated angular velocity value output by the actual excitation device and the simulated angular velocity value output by the excitation simulation device; Calculate the error between the calculated angular velocity value and the simulated angular velocity value.

3. The parameter tuning method according to claim 1, characterized in that, The parameter tuning method further includes: Verify the consistency of the PSS dual-input model parameters in the actual excitation device and the excitation simulation component.

4. The parameter tuning method according to claim 3, characterized in that, The consistency of the PSS dual-input model parameters in the actual excitation device and the excitation simulation device includes: Disconnect the rotational speed input branch in the PSS dual-input model and convert the PSS dual-input model into a PSS single-input model; The first active dynamic response of the real excitation device and the excitation simulation device were obtained respectively under a given voltage step. The consistency of the control characteristics of the PSS single-input model in the real excitation device and the excitation simulation component is verified based on the first active dynamic response. The PSS dual-input model is input into the real excitation device and the excitation simulation device, and the second active dynamic response of the real excitation device and the excitation simulation device is obtained under the given voltage step. The consistency of the control characteristics of the PSS dual-input model in the real excitation device and the excitation simulation component is verified based on the second active dynamic response.

5. A device for setting the swing reactance parameter of an excitation regulator, characterized in that, include: The simulation model building unit is configured to build a closed-loop simulation test model, which includes an excitation simulation component and connects a real excitation device to the closed-loop simulation test model. The simulation test unit is configured to add forced oscillation to the speed regulator stage of the closed-loop simulation test model under the condition that PSS is not engaged, to obtain the real output value of the real excitation device and the simulation output value of the excitation simulation component, and to calculate the error between the real output value and the simulation output value. The parameter initialization unit is configured to determine the initial value of the swing reactance parameter based on the error; The parameter tuning unit is configured to perform a voltage step test under a set operating condition based on the initial value to obtain the test result, and modify the swing reactance parameter according to the test result so that the active power fluctuation when the PSS is put into operation meets the first set condition. The process of determining the initial value of the swing reactance parameter based on the error includes: The initial value is determined for the swing reactance setpoint of the test condition corresponding to the error satisfying the second set condition. The second setting condition is that the frequency band error of the main modes of the regional oscillation and the local oscillation is less than a set value; The test results obtained by conducting a voltage step test under set operating conditions based on the initial value include: Based on the initial values, voltage step tests were conducted under the first operating condition with and without PSS, and the first generator load step response results with and without PSS were obtained respectively. The first operating condition is that the generator's active power is slightly greater than the active power threshold value for automatic PSS activation, and the generator's reactive power is close to 0. The method of obtaining test results by conducting a voltage step test under set operating conditions based on the initial value also includes: Based on the initial values, voltage step tests were conducted under the second operating condition with and without PSS, and the load step response results of the second generator with and without PSS were obtained respectively. The second operating condition is that the generator's active power is ≥ 60% of the rated active power, and the generator's reactive power is < 10% of the rated reactive power.

6. A system for setting the swing reactance parameters of an excitation regulator, characterized in that, include: Memory and processor; The memory is used to store programs; The processor is configured to call a program stored in the memory to execute the excitation regulator swing reactance parameter setting method as described in any one of claims 1 to 4.

7. A readable storage medium, characterized in that, It stores a computer program, which, when executed by a processor, implements the method for setting the swing reactance parameter of the excitation regulator as described in any one of claims 1 to 4.

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