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Water turbine governor parameter optimization method, device and system

An optimization method and a technology for optimizing devices, which are applied in safety devices, multi-objective optimization, machines/engines, etc., can solve the problems that the overshoot and adjustment time cannot be optimized at the same time, so as to suppress ultra-low frequency oscillation and improve dynamic performance Effect

Pending Publication Date: 2021-06-18
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing governor parameter optimization method for suppressing ultra-low frequency oscillation often adopts single-objective optimization, which cannot meet the requirements of overshoot and adjustment time at the same time.

Method used

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  • Water turbine governor parameter optimization method, device and system
  • Water turbine governor parameter optimization method, device and system
  • Water turbine governor parameter optimization method, device and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A kind of water turbine governor parameter optimization method of the present invention, see figure 1 shown, including the following steps:

[0051] Step 1: Based on the Matlab / Simulink simulation platform, build the simulation model of the 2-area system of 4 turbines, see for details figure 2 .

[0052] The generator system consists of governor, prime mover, excitation system and power system stabilizer. Except for the governor and the prime mover, the other parameters directly adopt the parameters of the 4-machine 2-area simulation system in the MATLAB R2017a Simulink platform demo.

[0053] The governor adopts PID model, and its transfer function is:

[0054]

[0055] Among them, K p 、K i and K d represent proportional, integral and differential coefficients respectively; B p Indicates the permanent slip coefficient; T y Indicates the servo system time constant.

[0056] The prime mover adopts a rigid water hammer model, and its transfer function is:

...

Embodiment 2

[0087] Based on the same inventive concept as in Embodiment 1, a water turbine governor parameter optimization device is provided in the embodiment of the present invention, including:

[0088] The acquisition unit is used to acquire an objective function for suppressing ultra-low frequency oscillation of the power system, and the parameters to be optimized in the objective function include proportional, integral and differential parameters of all water turbine governors;

[0089] An optimization unit, configured to optimize all parameters to be optimized based on the objective function and a preset optimization algorithm to obtain a Pareto optimal front;

[0090] The solution unit is used to select the solution with the smallest adjustment time within the acceptable range of overshoot according to the obtained Pareto optimal front as the optimal solution, and use the parameters corresponding to the optimal solution as the parameters to be optimized for the turbine governor th...

Embodiment 3

[0102] An embodiment of the present invention provides a water turbine governor parameter optimization system, including a storage medium and a processor;

[0103] The storage medium is used to store instructions;

[0104] The processor is configured to operate according to the instructions to execute the steps of the method according to any one of Embodiment 1.

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Abstract

The invention discloses a hydraulic turbine governor parameter optimization method, device and system, and the method comprises the steps: obtaining a target function used for suppressing the ultralow frequency oscillation of a power system, wherein the to-be-optimized parameters in the target function comprise the proportion, integral and differential parameters of a hydraulic turbine governor; based on the objective function and a preset optimization algorithm, optimizing all the to-be-optimized parameters to obtain a Pareto optimal leading edge; according to the obtained Pareto optimal leading edge, selecting a solution with the minimum adjustment time in an overshoot acceptable range as an optimal solution, and taking a parameter corresponding to the optimal solution as a final value of a to-be-optimized parameter of the water turbine governor. According to the method, parameter optimization is carried out by adopting a multi-objective function integrating overshoot and adjustment time, ultra-low frequency oscillation of the system can be well suppressed, and the dynamic performance of the optimized system can be improved.

Description

technical field [0001] The invention belongs to the field of analysis and control of electric power systems, and in particular relates to a parameter optimization method, device and system of a water turbine governor. Background technique [0002] For the power system where hydroelectric generators are transmitted over long distances, due to the water hammer effect of hydroelectric units and unreasonable governor parameter settings, the system is prone to ultra-low frequency oscillation problems. The ultra-low frequency oscillation of the power system can be effectively suppressed by optimizing the governor parameters. [0003] The existing governor parameter optimization method for suppressing ultra-low frequency oscillation often adopts single-objective optimization, which cannot meet the requirements of overshoot and adjustment time at the same time. Contents of the invention [0004] In view of the above problems, the present invention proposes a parameter optimizatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/17G06F30/27G06N3/12F03B15/08G06F111/06
CPCG06F30/17G06F30/27G06N3/126F03B15/08G06F2111/06Y02E10/20
Inventor 潘学萍王卫康苏乐曹阳
Owner HOHAI UNIV