Methods and devices for optimizing the configuration of parameters of hydropower unit speed control system

Abstract

This invention relates to the field of hydropower control technology, specifically a method and apparatus for optimizing the configuration of parameters in a hydropower unit speed control system. The method includes: constructing a hydropower unit speed control system model; obtaining guidance indicators for the configuration of various parameters of the hydropower unit speed control system model through curve analysis; and configuring the parameters of the hydropower unit speed control system based on these guidance indicators. This invention utilizes historical data to generate curves and uses curve analysis to obtain parameter configuration guidance indicators. The analysis process is simple, effectively reducing the professional requirements for personnel. Furthermore, it allows for continuous updating and correction using historical data, effectively improving the accuracy, rationality, and adaptability of the optimized configuration of hydropower unit speed control system parameters. This plays a significant role in the stable operation of the unit and improving regulation quality, providing technical support and assurance for the safe and stable transmission of hydropower energy.

Description

Technical Field

[0001] This invention relates to the field of hydropower control technology, specifically a method and apparatus for optimizing the configuration of parameters in a hydropower unit speed regulation system. Background Technology

[0002] Hydropower is the most important component of renewable energy and an indispensable part of China's energy supply system. It is also one of the priority energy options in my country today. With the rapid development of turbine speed control systems, the dynamic characteristics and response speed of prime mover regulation systems have been greatly improved. Hydropower turbine speed control systems have undergone significant changes in structure and control laws. Under the complex operation of AC / DC power systems, it is essential to conduct in-depth research on the impact of these new structural forms and control laws on the dynamic stability and frequency stability of the power system. Mastering the control laws of hydropower speed control systems, improving their dynamic performance, and ensuring the safe and stable transmission of hydropower energy provide technical support and guarantees.

[0003] Traditional methods for optimizing the speed control system of hydro-generator units often involve testing personnel continuously adjusting and testing on-site based on existing empirical formulas to analyze the characteristics of the speed control system and determine the optimal parameters. This method relies on the experience of the testing personnel, is prone to errors, is time-consuming, and has limited accuracy. Summary of the Invention

[0004] This invention provides a method and apparatus for optimizing the configuration of parameters of a hydropower unit speed control system, which overcomes the shortcomings of the prior art and can effectively solve the problems of the optimization method for the operation of a hydropower unit speed control system, which relies on the experience of testers, is prone to errors, and is time-consuming.

[0005] One of the technical solutions of this invention is achieved through the following measures: a method for optimizing the configuration of parameters of a hydropower unit speed control system, comprising:

[0006] Construct a model of the speed control system for hydropower units;

[0007] By combining curve analysis, we can obtain the guidance indicators for the configuration of various parameters of the hydropower unit speed control system model;

[0008] Configure the parameters of the hydropower unit speed control system based on the parameter configuration guidelines.

[0009] The following are further optimizations and / or improvements to the above-mentioned technical solution:

[0010] The aforementioned turbine and its speed control system model includes a governor, a mechanical-hydraulic system, head and flow disturbance, a water intake system, a turbine, a generator, and a load.

[0011] The above-mentioned parameter configuration guidelines for the hydropower unit speed control system model, obtained through curve analysis, include:

[0012] Historical data was selected to generate phase frequency response curves, amplitude frequency response curves, and damping-frequency relationship curves under different digital control amplification factors. The relationship between amplification factor and phase frequency response, amplitude frequency response, and damping characteristics in digital control was analyzed and obtained.

[0013] Historical data were selected to generate simulation curves of generator active power after instantaneous short-circuit fault at generator outlet under different hydraulic system amplification factors and simulation curves of generator active power after instantaneous short-circuit fault at generator outlet under hydraulic system integral coefficient. The relationship between hydraulic system amplification factor, hydraulic system integral coefficient and amplitude frequency characteristics, phase frequency characteristics and damping characteristics in hydraulic actuators was analyzed and obtained.

[0014] Historical data is selected to generate characteristic root curves and damping ratio curves for the changes in proportional coefficient, integral coefficient, and derivative coefficient in PID parameters. The relationship between the changes in proportional coefficient, integral coefficient, and derivative coefficient in digital control PID parameters and the oscillation frequency and damping ratio is analyzed and obtained.

[0015] Historical data was selected to generate characteristic root curves and damping ratio curves for changes in the amplification factor of the hydraulic actuator, and the relationship between the amplification factor of the hydraulic actuator and the oscillation frequency and damping ratio was analyzed.

[0016] Historical data were selected to generate characteristic root curves and damping ratio curves under the variation of the time constant of the water hammer effect of the turbine, and the relationship between the time constant of the water hammer effect of the turbine and the oscillation frequency and damping ratio was analyzed and obtained.

[0017] Based on the above analysis results, parameter configuration guidelines for the hydropower unit speed control system model are formulated.

[0018] The second technical solution of the present invention is achieved through the following measures: a parameter optimization and configuration device for a hydropower unit speed control system, comprising:

[0019] Model building unit, constructing a model of the hydropower unit speed control system;

[0020] The indicator formation unit, combined with curve analysis, obtains guidance indicators for the configuration of various parameters of the hydropower unit speed control system model;

[0021] The parameter configuration unit, in conjunction with the parameter configuration guidelines, completes the configuration of the parameters of the hydropower unit speed control system.

[0022] The following are further optimizations and / or improvements to the above-mentioned technical solution:

[0023] The above-mentioned indicator formation units include:

[0024] The first analysis module selects historical data to generate phase frequency response curves, amplitude frequency response curves, and damping-frequency relationship curves under different digital control amplification factors, and analyzes and obtains the relationship between amplification factor and phase frequency response, amplitude frequency response, and damping characteristics in digital control.

[0025] The second analysis module selects historical data to generate simulation curves of generator active power after instantaneous short-circuit fault at generator outlet under different hydraulic system amplification factors and simulation curves of generator active power after instantaneous short-circuit fault at generator outlet under hydraulic system integral coefficient. It analyzes and obtains the relationship between hydraulic system amplification factor, hydraulic system integral coefficient and amplitude frequency characteristics, phase frequency characteristics and damping characteristics in hydraulic actuator.

[0026] The third analysis module selects historical data to generate characteristic root curves and damping ratio curves for the changes in proportional coefficient, integral coefficient, and derivative coefficient in PID parameters, and analyzes and obtains the relationship between the changes in proportional coefficient, integral coefficient, and derivative coefficient in digital control PID parameters and the oscillation frequency and damping ratio.

[0027] The fourth analysis module selects historical data to generate characteristic root curves and damping ratio curves under the change of the amplification factor of the hydraulic actuator, and analyzes and obtains the relationship between the amplification factor of the hydraulic actuator and the oscillation frequency and damping ratio.

[0028] The fifth analysis module selects historical data to generate characteristic root curves and damping ratio curves under the variation of the time constant of the water hammer effect of the turbine, and analyzes and obtains the relationship between the time constant of the water hammer effect of the turbine and the oscillation frequency and damping ratio.

[0029] The guidance indicator integration module, based on the above analysis results, generates parameter configuration guidance indicators for the hydropower unit speed control system model.

[0030] This invention utilizes historical data to create curves, and then uses these curves to analyze and obtain parameter configuration guidance indicators. The analysis process is simple, effectively reducing the professional requirements for staff. Furthermore, it can be continuously updated and corrected using historical data, effectively improving the accuracy, rationality, and adaptability of the parameter optimization configuration of the hydropower unit speed control system. This plays a significant role in the stable operation of the unit and the improvement of regulation quality, providing technical support and guarantee for the safe and stable transmission of hydropower energy. Attached Figure Description

[0031] Appendix Figure 1 This is a schematic diagram of the method flow of the present invention.

[0032] Appendix Figure 2 This is a schematic diagram of the hydropower unit speed control system model in this invention.

[0033] Appendix Figure 3 This is a schematic diagram of the simulation structure of the speed controller in this invention.

[0034] Appendix Figure 4 This is a graph showing the phase frequency response curves at different amplification factors in this invention.

[0035] Appendix Figure 5 This is a graph showing the amplitude-frequency response curves at different amplification factors in this invention.

[0036] Appendix Figure 6 This is a graph showing the relationship between additional damping and frequency at different amplification factors in this invention.

[0037] Appendix Figure 7 The image shows the time-domain simulation results (partial magnification) of five different Kep parameters in this invention.

[0038] Appendix Figure 8 The image shows the time-domain simulation results (partial magnification) for three different Kei parameters in this invention.

[0039] Appendix Figure 9 This is a graph of the characteristic roots under the change of the scaling factor in this invention.

[0040] Appendix Figure 10 This is a damping ratio curve under varying proportional coefficients in this invention.

[0041] Appendix Figure 11 This is a graph of the characteristic roots under the change of the integral coefficient in this invention.

[0042] Appendix Figure 12 This is a damping ratio curve under the change of integral coefficient in this invention.

[0043] Appendix Figure 13 This is a damping ratio curve under the variation of the differential coefficient in this invention.

[0044] Appendix Figure 14 This is a damping ratio curve under the variation of the differential coefficient in this invention.

[0045] Appendix Figure 15 This is a characteristic root curve diagram of the hydraulic system under varying magnification in this invention.

[0046] Appendix Figure 16 This is a damping ratio curve of the hydraulic system under varying magnification in this invention.

[0047] Appendix Figure 17 This is a graph showing the characteristic values ​​under the TW variation in this invention.

[0048] Appendix Figure 18 This is a damping ratio curve under the variation of TW in this invention.

[0049] Appendix Figure 19 This is a schematic diagram of the device structure of the present invention. Detailed Implementation

[0050] The present invention is not limited to the following embodiments, and the specific implementation can be determined according to the technical solution of the present invention and the actual situation.

[0051] The present invention will be further described below with reference to embodiments and accompanying drawings:

[0052] Example 1: As shown in the attached document Figure 1 As shown in the figure, an embodiment of the present invention discloses a method for optimizing the configuration of parameters of a hydropower unit speed control system, including:

[0053] Step S101: Construct a model of the hydropower unit speed control system;

[0054] In this step, by constructing a model of the hydropower unit speed regulation system, the various control parts of the hydropower unit speed regulation system are identified, which determines the parameters to be analyzed and the curves to be plotted in the subsequent parameter configuration guidance index formation process.

[0055] The existing hydro-generator unit regulation system consists of a governor and the regulated object, forming a closed-loop control system. Therefore, the hydro-generator unit speed regulation system model is attached. Figure 2 As shown, it includes a governor, a mechanical hydraulic system, head and flow disturbance, a water intake system, a turbine, a generator, and a load.

[0056] Modern digital (microcomputer) electro-hydraulic control systems generally employ PID control, with parallel control being a common application of PID control. A typical turbine governor is... Figure 2 As shown: Let the output of the opening command be , and the input of this stage be . Under the condition that the given values ​​remain unchanged, we have:

[0057]

[0058] all:

[0059]

[0060] The electro-hydraulic conversion stage in a speed governor converts electrical signals into hydraulic signals, achieving electro-hydraulic conversion. Commonly used electro-hydraulic conversion mechanisms include proportional servo valves, servo / stepper motor drive electro-motor converters, and digital valve electro-motor converters. These mechanisms typically have their own feedback loop; they receive the regulator's opening command and convert it into a corresponding hydraulic signal output, as detailed below:

[0061]

[0062] Where TP is the electro-hydraulic conversion time constant.

[0063] The actuator, also known as the second-stage hydraulic servo system, consists of a pressure regulating valve and symmetrical hydraulic cylinders. The output displacement of the electro-hydraulic converter is used as the control quantity u of the pressure regulating valve core displacement, and the displacement y of the output hydraulic cylinder (main servo drive) is used as the control quantity. Its transfer function is relatively typical. Ignoring load damping Bc, load stiffness Kc, and leakage Ct, the transfer function is:

[0064]

[0065] Where: m is the total mass of the load and piston; v t K is the total compressed volume of the oil. q For flow gain; A n β is the effective area of ​​the relay piston; c The elastic modulus of the oil;

[0066] Ignoring higher-order terms in the denominator, the calculation can be simplified to:

[0067]

[0068] Among them, T y The main relay response time constant.

[0069] The transfer function of the hydraulic system controlled by the PID described above can be expressed by the following formula:

[0070]

[0071] During the turbine regulation process, changes in guide vane opening lead to changes in water flow. These changes in flow generate water hammer in the intake system, which further alters the flow rate and ultimately affects the regulation process. The hydropower plant's intake system includes a pressure intake system, turbine feed pipes, spiral casing, and tailrace pipes.

[0072] Furthermore, regarding the hydropower unit speed control system model, considering the input as speed deviation Δω and the output T... M For mechanical torque, the transfer function of the regulating system is:

[0073]

[0074] Among them: s=jω; Δω=ω0-ω.

[0075] In this formula, replacing s with jω, we get:

[0076]

[0077]

[0078] By That is, Δω=jΔδ, ΔT M=ΔTs-ΔT D =K GOV Δδ-D GOV Δω yields:

[0079]

[0080]

[0081] ΔT M From ΔTs(ΔTs=K) GOV Δδ) and ΔT D (ΔT D =D GOV It consists of two parts, Δω, which we call ΔTs and ΔT. D These are the mechanical synchronous torque and the mechanical damping torque, respectively.

[0082] ΔTs affects the oscillation frequency; ΔT D Affects oscillation damping. (D) GOV and K GOV Both are functions of the oscillation frequency ω, and are respectively called the mechanical damping torque coefficient and the mechanical synchronous torque coefficient.

[0083] Analytical coefficient D GOV By examining the sign of the frequency band of interest in dynamic stability, the influence of the prime mover and control system on damping can be derived. If D GOV If the sign of the damping coefficient D is opposite, it indicates that the regulating effect of the prime mover and the regulating system is to provide negative damping. GOV If the coefficient D has the same sign, then the regulating effect of the prime mover and the regulating system provides positive damping.

[0084] make Then 1-TsT turbine ω 2 =0, this function is a quadratic function that opens downwards, and solving the above equation yields the zeros of DGov. Pick

[0085]

[0086] like:

[0087] D GOV =0, the damping provided by the prime mover adjustment system is 0;

[0088] DGOV < 0, the prime mover and regulating system provide negative damping;

[0089] DGOV > 0, the prime mover and regulating system provide positive damping.

[0090] Step S102: Construct a hydropower unit speed regulation system model, wherein the hydropower unit speed regulation system model includes the turbine and its speed regulation system. Combined with curve analysis, the configuration guidance indicators of each parameter of the hydropower unit speed regulation system model are obtained.

[0091] The above steps specifically include:

[0092] (1) Select historical data to form phase frequency characteristic curves, amplitude frequency characteristic curves, and damping-frequency relationship curves under different digital control amplification factors, and analyze and obtain the relationship between amplification factor and phase frequency characteristic, amplitude frequency characteristic, and damping characteristic in digital control;

[0093] This step analyzes the impact of the amplification factor of the digital control section of the speed regulation system on the frequency characteristics.

[0094] For example, the following three sets of parameters can be set in frequency analysis;

[0095] Parameter group 1: Tg = Tturbine = 0.2, amplification factor KA = 16.7;

[0096] Parameter group 2: Tg = Tturbine = 0.2, magnification KA = 22.2;

[0097] Parameter group 3: Tg = Tturbine = 0.2, magnification factor KA = 33.3.

[0098] The phase frequency response curves at the above three different amplification factors are as follows: Figure 4 As shown, the amplitude-frequency response curve is as follows: Figure 5 As shown.

[0099] Depend on Figure 4 It can be seen that the phase frequency characteristics are the same at different amplification factors, and the phase frequency characteristic curves for the three sets of parameters overlap, meaning that changes in the amplification factor KA do not affect the phase frequency characteristics of the control system. From Figure 5 As can be seen from the amplitude-frequency response curve, the amplification factor KA has a significant impact on the amplitude-frequency response, especially in the low-frequency range.

[0100] For example, to analyze the relationship between the magnification KA and the additional damping, five sets of parameters were selected, where Tturbine = Tg = 0.2s, and KA was taken as 50, 33.3, 22.2, 16.7, and 10, respectively. Figure 6 The graph shows the relationship between additional damping and frequency for these five sets of parameters. The zero-crossing point of DGOV is at 0.8Hz (points are taken every 0.1Hz).

[0101] Depend on Figure 6It can be seen that the curves showing the relationship between additional damping and frequency under the five different amplification factor KA parameter configurations share the same zero-crossing point. However, different amplification factors KA have a significant impact on the magnitude of the system's damping. That is, the amplification factor KA does not change the system's oscillation boundary frequency. In the positive damping region (DGOV>0), the larger the amplification factor, the greater the positive additional damping, and the greater the positive damping provided to the system. In the negative damping region (DGOV<0), the larger the amplification factor, the greater the absolute value of the additional damping, and the greater the negative damping provided to the system.

[0102] (2) Select historical data to form simulation curves of generator active power after instantaneous short circuit fault at generator outlet under different hydraulic system amplification factors and simulation curves of generator active power after instantaneous short circuit fault at generator outlet under hydraulic system integral coefficient. Analyze and obtain the relationship between hydraulic system amplification factor, hydraulic system integral coefficient and amplitude frequency characteristics, phase frequency characteristics and damping characteristics in hydraulic actuator.

[0103] 1. Analyze the effect of the hydraulic system's amplification factor (Kep) on its damping characteristics, including the specific process, for example:

[0104] First, frequency calculation is performed. By selecting different parameters, amplitude-frequency and phase-frequency characteristics are calculated, and the additional damping coefficient of the regulating system is analyzed.

[0105] Set the parameter group as follows: Kei = 0.2, TCH = 0.2, KA = 22.2, and Kep to 5, 10, and 20 respectively. Then perform frequency domain calculations.

[0106] The Prony calculation results are presented for different hydraulic system amplification factors (Kep) with and without considering the regulating system. Without considering the regulating system, the oscillation frequency is 1.015 Hz, and the damping ratio is 0.039 Hz. When Kep = 5, the system oscillation frequency is 1.029 Hz, which is greater than the system's boundary frequency. At this point, the system's damping ratio is 0.034, indicating that the regulating system provides negative damping. When Kep = 10 and Kep = 20, the system oscillation frequency is 1.036, both less than the boundary frequencies of 1.2 Hz and 1.6 Hz, respectively. The system damping ratios are 0.040 and 0.046, respectively, which are greater than the damping ratio of 0.039 when the regulating system is not considered. This indicates that considering the prime mover, the regulating system provides positive damping.

[0107] The Prony calculation results are consistent with those of the frequency domain calculation.

[0108] Figure 7 The curves shown are simulation curves of the generator's active power after an instantaneous short-circuit fault at the generator outlet, respectively, when the prime mover regulation system is not considered and when the prime mover regulation system is considered with five different sets of Kep parameters.

[0109] When a momentary short-circuit fault occurs at the generator outlet of a single-machine infinite bus system without considering the regulating system, the oscillation frequency of the generator's active power is 1.015Hz. After considering the prime mover regulating system, when Kep = 0.1 and Kep = 1, the oscillation amplitude of the generator's active power is larger than when the prime mover regulating system is not considered, providing negative damping to the system. The simulation curve for Kep = 5 is basically the same as the oscillation amplitude and frequency when the prime mover regulating system is not considered. When Kep = 10 and Kep = 20, the oscillation amplitude of the active power is smaller than when it is not considered. At this time, the prime mover regulating system provides positive damping to the system.

[0110] The Prony calculation results in the time domain are consistent with those in the frequency domain.

[0111] As Kep gradually increases, the system's boundary frequency increases. When Kep changes from 0.1 to 20, the damping provided by the regulating system changes from negative to positive. In a single-machine infinite bus system, the damping provided by the prime mover regulating system is not monotonic. Kep ​​will significantly change the amplitude-frequency and phase-frequency characteristics as well as the damping characteristics of the regulating system.

[0112] 2. Analyze the influence of the integral coefficient (Kei) of the hydraulic system on the damping characteristics, including the specific process, for example:

[0113] First, frequency response calculations are performed. By selecting different parameters, amplitude-frequency and phase-frequency characteristics are calculated, and the additional damping coefficient of the regulating system is analyzed. Kei is taken as 0.5, 5, and 10 respectively. Then, frequency domain calculations are performed.

[0114] As Kei increases, the system's boundary frequency decreases. However, the change in the boundary frequency is not significant, and the damping characteristics exhibit crossover; the change in the damping characteristics does not monotonically correspond to the trend of Kei's change.

[0115] The following is a time-domain simulation analysis:

[0116] The Prony results in the time domain were obtained using the simulation data described above. The table shows the Prony calculation results with and without considering the prime mover regulation system, and with different hydraulic system amplification factors (Kei). In the table, without considering the prime mover regulation system, the oscillation frequency is 1.015 Hz, and the damping ratio is 0.039 Hz. When considering the prime mover regulation system and Kei = 0.5, the system oscillation frequency is 1.029 Hz, which is greater than the system's boundary frequency. At this point, the system damping ratio is 0.034, indicating that the prime mover regulation system provides negative damping. When Kei = 5 and Kei = 10, the system oscillation frequencies are 1.030 Hz and 1.032 Hz, respectively, and the system damping ratios are 0.032 and 0.030, respectively, which are less than the damping ratio of 0.039 without considering the regulation system. Therefore, the prime mover regulation system provides negative damping.

[0117] Of the three sets of parameters considered, the larger the Kei value, the more negative damping the prime mover regulation system provides to the system. The Prony calculation results are consistent with the frequency domain calculations.

[0118] Figure 8 The curves shown are simulation curves of the generator's active power after an instantaneous short-circuit fault at the generator outlet, respectively, when the prime mover regulation system is not considered and when the prime mover regulation system is considered with three different sets of Kei parameters.

[0119] Considering the prime mover regulation system and taking three different sets of hydraulic system amplification factor Kei parameters, the oscillation amplitude of active power is larger than that without considering the prime mover regulation system. Furthermore, as Kei increases, the oscillation amplitude of active power continuously increases, and the system damping continuously decreases. This is consistent with the Prony calculation results and frequency domain analysis conclusions.

[0120] Kei can significantly alter the amplitude-frequency and phase-frequency characteristics, as well as the damping characteristics, of the regulating system. As Kei gradually increases, the damping provided by the regulating system in a single-machine infinite bus system is no longer monotonic.

[0121] (3) Select historical data to form characteristic root curves and damping ratio curves of the proportional coefficient, integral coefficient and derivative coefficient of PID parameters, and analyze the relationship between the changes of proportional coefficient, integral coefficient and derivative coefficient of digital control PID parameters and oscillation frequency and damping ratio.

[0122] The characteristic root variation trajectories and damping ratios under different proportional coefficients are shown below. Figure 9 and Figure 10 As shown in the attached figure, the larger the proportional gain, the higher the oscillation frequency and the lower the damping ratio.

[0123] The characteristic root variation trajectories and damping ratios under different integral coefficients are shown below. Figure 11 and Figure 12 As shown in the attached figure, the larger the integral coefficient amplification factor, the higher the oscillation frequency and the lower the damping ratio.

[0124] The characteristic root variation trajectories and damping ratios under different differential coefficients are shown below. Figure 13 and Figure 14 As shown in the attached figure, as the differential coefficient gradually increases, the oscillation frequency gradually increases, and the system damping ratio changes from negative to positive, but the trend is not monotonic.

[0125] (4) Select historical data to form characteristic root curves and damping ratio curves under the change of amplification factor of hydraulic actuator, and analyze and obtain the relationship between amplification factor of hydraulic actuator and oscillation frequency and damping ratio;

[0126] The characteristic root variation trajectories and damping ratios of hydraulic actuators under different amplification factors in speed control systems are shown below. Figure 15 and Figure 16 As shown, the higher the amplification factor of the hydraulic actuator in the speed control system, the greater the amplification factor, the higher the oscillation frequency and the higher the damping ratio.

[0127] (5) Select historical data to form characteristic root curves and damping ratio curves under the change of time constant of water hammer effect of turbine, and analyze the relationship between water hammer effect time constant of turbine and oscillation frequency and damping ratio.

[0128] The characteristic root variation trajectories and damping ratios under different time constants of water hammer effect in water turbines are shown below. Figure 17 and Figure 18 As shown, TW has little effect on the oscillation frequency, but as TW gradually increases, the damping ratio decreases significantly.

[0129] (6) Based on the above analysis results, parameter configuration guidelines for the hydropower unit speed control system model are formed.

[0130] As can be seen from the changes in the characteristic root trajectory described above, the configuration of speed control system parameters can significantly affect the characteristic root trajectory. The larger the proportional and integral coefficients, the larger the real and imaginary parts of the characteristic roots, and the lower the corresponding damping ratio. The influence of the differential coefficients on the characteristic roots is not monotonic. Under different differentials, prime mover characteristic parameters, and permanent state difference coefficients, the characteristic roots can be distributed in the left and right planes of the complex plane, and the corresponding damping also has positive and negative differences.

[0131] In general, in areas with insufficient damping, the parameter configuration strategy of the speed control system should be studied. Generally speaking, the open-loop amplification factor should not be too large, and the influence of water hammer effect should be minimized as much as possible.

[0132] Step S103: Configure the parameters of the hydropower unit speed control system in accordance with the parameter configuration guidelines.

[0133] This invention utilizes historical data to create curves, and then uses these curves to analyze and obtain parameter configuration guidance indicators. The analysis process is simple, effectively reducing the professional requirements for staff. Furthermore, it can be continuously updated and corrected using historical data, effectively improving the accuracy, rationality, and adaptability of the parameter optimization configuration of the hydropower unit speed control system. This plays a significant role in the stable operation of the unit and the improvement of regulation quality, providing technical support and guarantee for the safe and stable transmission of hydropower energy.

[0134] Example 2: As shown in the attached document Figure 19 As shown in the figure, an embodiment of the present invention discloses a parameter optimization configuration device for a hydropower unit speed control system, comprising:

[0135] Model building unit, constructing a model of the hydropower unit speed control system;

[0136] The indicator formation unit, combined with curve analysis, obtains guidance indicators for the configuration of various parameters of the hydropower unit speed control system model;

[0137] The parameter configuration unit, in conjunction with the parameter configuration guidelines, completes the configuration of the parameters of the hydropower unit speed control system.

[0138] The above-mentioned indicator formation units include:

[0139] The first analysis module selects historical data to generate phase frequency response curves, amplitude frequency response curves, and damping-frequency relationship curves under different digital control amplification factors, and analyzes and obtains the relationship between amplification factor and phase frequency response, amplitude frequency response, and damping characteristics in digital control.

[0140] The second analysis module selects historical data to generate simulation curves of generator active power after instantaneous short-circuit fault at generator outlet under different hydraulic system amplification factors and simulation curves of generator active power after instantaneous short-circuit fault at generator outlet under hydraulic system integral coefficient. It analyzes and obtains the relationship between hydraulic system amplification factor, hydraulic system integral coefficient and amplitude frequency characteristics, phase frequency characteristics and damping characteristics in hydraulic actuator.

[0141] The third analysis module selects historical data to generate characteristic root curves and damping ratio curves for the changes in proportional coefficient, integral coefficient, and derivative coefficient in PID parameters, and analyzes and obtains the relationship between the changes in proportional coefficient, integral coefficient, and derivative coefficient in digital control PID parameters and the oscillation frequency and damping ratio.

[0142] The fourth analysis module selects historical data to generate characteristic root curves and damping ratio curves under the change of the amplification factor of the hydraulic actuator, and analyzes and obtains the relationship between the amplification factor of the hydraulic actuator and the oscillation frequency and damping ratio.

[0143] The fifth analysis module selects historical data to generate characteristic root curves and damping ratio curves under the variation of the time constant of the water hammer effect of the turbine, and analyzes and obtains the relationship between the time constant of the water hammer effect of the turbine and the oscillation frequency and damping ratio.

[0144] The guidance indicator integration module, based on the above analysis results, generates parameter configuration guidance indicators for the hydropower unit speed control system model.

[0145] Example 3: This embodiment of the invention discloses a storage medium storing a computer program that can be read by a computer. The computer program is configured to execute a method for optimizing the configuration of parameters of a hydropower unit speed control system when it is run.

[0146] The aforementioned storage media may include, but are not limited to, USB flash drives, read-only memory, portable hard drives, magnetic disks, optical disks, and other media capable of storing computer programs.

[0147] Example 4: This embodiment of the invention discloses an electronic device, including a processor and a memory. The memory stores a computer program, which is loaded and executed by the processor to implement a method for optimizing the configuration of parameters of a hydropower unit speed control system.

[0148] The processor described above can be a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), an ASIC, an FPGA, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. It can also be a combination that implements computational functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc. The memory can include, but is not limited to, various media capable of storing computer programs, such as USB flash drives, read-only memory, portable hard drives, magnetic disks, or optical disks.

[0149] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. The solutions in the embodiments of this application can be implemented in various computer languages, such as the object-oriented programming language Java and the interpreted scripting language JavaScript.

[0150] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. 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... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0151] 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 1The function specified in one or more boxes.

[0152] The above technical features constitute the preferred embodiment of the present invention, which has strong adaptability and optimal implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the requirements of different situations.

Claims

1. A method for optimizing the configuration of parameters in a hydropower unit speed control system, characterized in that, include: Construct a model of the speed control system for hydropower units; By combining curve analysis, we can obtain the guidance indicators for the configuration of various parameters of the hydropower unit speed control system model; Configure the parameters of the hydropower unit speed control system based on the parameter configuration guidelines; Among them, the parameter configuration guidance indicators for the hydropower unit speed control system model were obtained by combining curve analysis, including: Historical data was selected to generate phase frequency response curves, amplitude frequency response curves, and damping-frequency relationship curves under different digital control amplification factors. The relationship between amplification factor and phase frequency response, amplitude frequency response, and damping characteristics in digital control was analyzed and obtained. Historical data were selected to generate simulation curves of generator active power after instantaneous short-circuit fault at generator outlet under different hydraulic system amplification factors and simulation curves of generator active power after instantaneous short-circuit fault at generator outlet under hydraulic system integral coefficient. The relationship between hydraulic system amplification factor, hydraulic system integral coefficient and amplitude frequency characteristics, phase frequency characteristics and damping characteristics in hydraulic actuators was analyzed and obtained. Historical data is selected to generate characteristic root curves and damping ratio curves for the changes in proportional coefficient, integral coefficient, and derivative coefficient in PID parameters. The relationship between the changes in proportional coefficient, integral coefficient, and derivative coefficient in digital control PID parameters and the oscillation frequency and damping ratio is analyzed and obtained. Historical data was selected to generate characteristic root curves and damping ratio curves for changes in the amplification factor of the hydraulic actuator, and the relationship between the amplification factor of the hydraulic actuator and the oscillation frequency and damping ratio was analyzed. Historical data were selected to generate characteristic root curves and damping ratio curves under the variation of the time constant of the water hammer effect of the turbine, and the relationship between the time constant of the water hammer effect of the turbine and the oscillation frequency and damping ratio was analyzed and obtained. Based on the above analysis results, parameter configuration guidelines for the hydropower unit speed control system model are formulated.

2. The method for optimizing the configuration of parameters of a hydropower unit speed control system according to claim 1, characterized in that, The model of the turbine and its speed control system includes a governor, a mechanical hydraulic system, head and flow disturbance, a water intake system, a turbine, a generator, and a load.

3. A device for optimizing and configuring parameters of a hydropower unit speed control system using the method described in any one of claims 1 to 2, characterized in that, include: Model building unit, constructing a model of the hydropower unit speed control system; The indicator formation unit, combined with curve analysis, obtains guidance indicators for the configuration of various parameters of the hydropower unit speed control system model; The parameter configuration unit, in conjunction with the parameter configuration guidelines, completes the configuration of the parameters of the hydropower unit speed control system.

4. The parameter optimization and configuration device for the hydropower unit speed control system according to claim 3, characterized in that, The indicator forming unit includes: The first analysis module selects historical data to generate phase frequency response curves, amplitude frequency response curves, and damping-frequency relationship curves under different digital control amplification factors, and analyzes and obtains the relationship between amplification factor and phase frequency response, amplitude frequency response, and damping characteristics in digital control. The second analysis module selects historical data to generate simulation curves of generator active power after instantaneous short-circuit fault at generator outlet under different hydraulic system amplification factors and simulation curves of generator active power after instantaneous short-circuit fault at generator outlet under hydraulic system integral coefficient. It analyzes and obtains the relationship between hydraulic system amplification factor, hydraulic system integral coefficient and amplitude frequency characteristics, phase frequency characteristics and damping characteristics in hydraulic actuator. The third analysis module selects historical data to generate characteristic root curves and damping ratio curves for the changes in proportional coefficient, integral coefficient, and derivative coefficient in PID parameters, and analyzes and obtains the relationship between the changes in proportional coefficient, integral coefficient, and derivative coefficient in digital control PID parameters and the oscillation frequency and damping ratio. The fourth analysis module selects historical data to generate characteristic root curves and damping ratio curves under the change of the amplification factor of the hydraulic actuator, and analyzes and obtains the relationship between the amplification factor of the hydraulic actuator and the oscillation frequency and damping ratio. The fifth analysis module selects historical data to generate characteristic root curves and damping ratio curves under the variation of the time constant of the water hammer effect of the turbine, and analyzes and obtains the relationship between the time constant of the water hammer effect of the turbine and the oscillation frequency and damping ratio. The guidance indicator integration module, based on the above analysis results, generates parameter configuration guidance indicators for the hydropower unit speed control system model.

5. A storage medium, characterized in that, The storage medium stores a computer program that can be read by a computer, and the computer program is configured to execute the hydropower unit speed regulation system parameter optimization configuration method as described in any one of claims 1 to 2 when it is run.

6. An electronic device, characterized in that, It includes a processor and a memory, wherein the memory stores a computer program, which is loaded and executed by the processor to implement the method for optimizing the configuration of parameters of the hydropower unit speed control system as described in any one of claims 1 to 2.

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