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Steam turbine generator main steam valve opening degree prediction control method based on non-linear interference observer

A technology of turbo generator and disturbance observer, which is applied in the direction of machines/engines, engine components, mechanical equipment, etc., and can solve the problems of non-matching uncertainty, powerlessness, lack of robustness to parameter and model changes, etc.

Active Publication Date: 2015-07-29
GUODIAN SCI & TECH RES INST +1
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  • Abstract
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Problems solved by technology

However, these methods are not robust to parameter and model changes, and are powerless against mismatch uncertainties in the system

Method used

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  • Steam turbine generator main steam valve opening degree prediction control method based on non-linear interference observer
  • Steam turbine generator main steam valve opening degree prediction control method based on non-linear interference observer
  • Steam turbine generator main steam valve opening degree prediction control method based on non-linear interference observer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0106] Embodiment (1) Realize the accuracy and rapidity of turbine generator power angle tracking.

Embodiment approach ( 1

[0108] Step 1: Analysis and modeling of turbogenerator main steam valve opening control system

[0109] The closed-loop control system adopts a negative feedback control structure, and the output is the power angle of the turbogenerator. The designed closed-loop control system mainly includes two parts: the controller link and the system model, and its structural layout is shown in figure 2 shown.

[0110] The main valve opening control system model is described as follows:

[0111] δ · = ω - ω 0 ω · = - D H ( ...

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Abstract

The invention provides a steam turbine generator main steam valve opening degree prediction control method based on a non-linear interference observer. The method comprises the four major steps that 1, a steam turbine generator main steam valve opening degree control system carries out analysis and modeling; 2, the steam turbine generator main steam valve opening degree prediction control design is carried out; 3, the non-linear interference observer is designed; 4, the design is completed. The method aims at a main steam valve opening degree control system model, a control rule with the closed type analytical solution is designed, and then, the non-linear interference observer is designed for controlling the interference for compensation, so that the global stability of the closed loop control system is ensured under the condition with higher input interference, and meanwhile, the fast and precise tracking of a steam turbine generator power angle on the preset tracks is realized.

Description

technical field [0001] The invention relates to a method for predicting and controlling the opening of the main steam valve of a turbogenerator based on a nonlinear disturbance observer. It is aimed at a single-machine infinite bus system and provides a turbogenerator based on a nonlinear disturbance observer. The main steam valve opening predictive control method is used for controlling the work angle of a steam turbine generator and belongs to the technical field of automatic control. Background technique [0002] Excitation control and steam valve adjustment of turbogenerator are two important means to improve the stability of power system. Since the excitation control is limited by the top value of the excitation current, requiring the generator to have an excessively high top value of the excitation current will increase the manufacturing cost of the generator; at the same time, the rising speed of the excitation current of the generator will also be limited by the time...

Claims

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Application Information

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IPC IPC(8): F01D17/10
Inventor 陈宝林韩璞刘志杰刘金琨董泽王德华
Owner GUODIAN SCI & TECH RES INST
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