A Predictive Control Method of Turbogenerator Main Steam Valve Opening Based on Nonlinear Disturbance Observer

A turbogenerator and disturbance observer technology, applied in the direction of machines/engines, engine components, mechanical equipment, etc., can solve problems such as lack of robustness to parameter and model changes, non-matching uncertainty powerlessness, etc.
CN104806302BActive Publication Date: 2016-05-25GUODIAN SCI & TECH RES INST +1
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
GUODIAN SCI & TECH RES INST
Publication Date
2016-05-25

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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.
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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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