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

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

Active Publication Date: 2009-01-14
KUNMING UNIV OF SCI & TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

For systems with variable operating conditions and strong nonlinearity such as hydr

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

[0096] Example 1: Linear water hammer

[0097] 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 will reach 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.

[0098] Objective function J = ∫ 0 ∞ w 1 | e | + w 2 u 2 + w 3 | e δ | dt + w 4 t s ...

Embodiment 2

[0099] Example 2: Non-linear rigid water hammer

[0100] Non-linear rigid water hammer model such as figure 2 As shown, the rest is 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 J = ∫ 0 ∞ w 1 | e | + w 2 u 2 + w 3 | e δ | dt + w 4 ...

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

Claims

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Application Information

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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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