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Parameter optimization method of hydraulic turbine speed control system based on satisfaction control

A speed regulation system and satisfactory control technology, which can be used in mechanical equipment, hydroelectric power generation, engine components, etc., and can solve problems such as optimization design difficulties.

Active Publication Date: 2012-01-11
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For systems with variable operating conditions and strong nonlinearity such as hydroelectric generating units, it is difficult to optimize the parameters in the design

Method used

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  • Parameter optimization method of hydraulic turbine speed control system based on satisfaction control
  • Parameter optimization method of hydraulic turbine speed control system based on satisfaction control
  • Parameter optimization method of hydraulic turbine speed control system based on satisfaction control

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] Example 1: Linear water hammer

[0094] System structure diagram such as figure 1 Shown. The known number of the system parameters obtained by measurement is: T w =3.0s, e=0.85, e qh = 0.4, e y = 1.1, e n = 1.5, T a =5.0s, T y =0.1s, b p = 0.02. Taking overall satisfaction as the fitness degree, using genetic algorithm, after 12 iterations, the overall satisfaction of the system reaches 1, such as Figure 5 . At this time, the speed control system parameter is T d = 0.88, b t = 0.8645, T n =5.9935.

[0095] Objective function For fitness, after 21 genetic iterations, J reaches the minimum, such as Image 6 , The speed control system parameter is T d =0.1, b t = 2.0935, T n = 5.6065. And the parameter calculated by pole placement method is: T d =3.8, b t = 1.04, T n = 2.2. Substitute these three sets of parameters into figure 1 The system is simulated and obtained as Figure 7 The curve shown. It can be seen from the above simulation results that, since the satisfacto...

Embodiment 2

[0096] Example 2: Non-linear rigid water hammer

[0097] Non-linear rigid water hammer model such as figure 2 Shown, the rest of the same figure 1 , The system parameter obtained by measurement is T w =2.3s, f p =0.01, A t =1.004, q nL =0.05, D=0.5, e n = 1.5, T a =5.0s, T y = 0.1s. Taking overall satisfaction as the fitness degree, using genetic algorithm, after 39 iterations, the overall satisfaction of the system reaches 1, such as Figure 8 . At this time, the speed control system parameter is T d =0.197, b t =1.7452, T n = 6.9. Objective function For fitness, after 50 genetic iterations, J reaches the minimum, such as Picture 9 , The speed control system parameter is T d = 0.8798, b t = 0.5572, T n =8.7977.

[0098] According to the data provided by IEEE, T is calculated d =0.75, b t = 0.64, T n = 5.92. Substitute these three sets of parameters into figure 2 The system is simulated and obtained as Picture 10 The curve shown. It can also be seen from the simulation r...

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Abstract

The invention relates to the technical field of parameter optimization of a PID (proportional-integral-derivative) controller, in particular to a method of parameter optimization of a speed regulating system of a water turbine based on satisfying control, belonging to the technical field of parameter optimization of the PID controller; the invention collects the performance indexes of rising time, overshoot, adjusting time and steady state error which are responded by the water turbine system according to the data which is required by the specific performance indexes of the water turbine system; then a satisfaction function of all the performance indexes can be obtained; the actual operation results of the system are taken as the standard to design and optimize the parameter of the controller; a genetic algorithm model which takes the total satisfaction function of the system performance indexes as fitness is established; the method of parameter optimization of the speed regulating system of the water turbine based on satisfying control is proposed by the simulation, contrast and analysis of three parameter optimization design methods and the total satisfaction meets the PID parameter which is required by the design; although the system designed by the invention does not have the necessity of operating in the optimized working condition, the actual requirement can be met better, and the cost of optimization can be reduced greatly, therefore, the invention has practicability and is easy to realize.

Description

technical field [0001] The invention relates to the technical field of parameter optimization of a PID (proportional-integral-derivative) controller, in particular to a method for optimizing parameters of a speed regulating system of a water turbine based on satisfactory control, and belongs to the technical field of parameter optimization of a PID controller. Background technique [0002] The hydroelectric unit is a typical hydraulic, mechanical, and electrical coupling system, which has time-varying, non-minimum phase characteristics, and is a nonlinear object whose parameters change with the change of working conditions. Conventional PID (proportional-integral-derivative) is now widely used Regulator. A good speed control system not only has a great effect on improving the stability of the power system with large disturbances, but also is very effective in improving the stability of the system with small disturbances and suppressing low-frequency oscillations of the syste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03B15/00
CPCY02E10/226Y02E10/20
Inventor 束洪春刘志坚刘可真孙士云唐岚张加贝张广斌朱子钊朱盛强
Owner KUNMING UNIV OF SCI & TECH
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