Synchronous power generator excitation control method

Abstract

The invention discloses a synchronous power generator excitation control method which comprises the steps of (1) establishing each unit simplified model and sliding mode iterative learning controller model of a synchronous power generator excitation system , (2) taking an error e1 of a synchronous power generator terminal feedback voltage U and given voltage U0 as input of a sliding mode control part and an iterative learning control part, (3) superposing a sliding mode control output uSMC and iterative learning control output uILC to obtain excitation voltage Uf, (4) allowing the excitation voltage Uf to pass a power amplification unit to obtain excitation voltage UF which controls a synchronous power generator, and (5) taking UF as input of a synchronous power generator unit, and obtaining synchronous power generator actual output voltage UG, wherein the synchronous power generator actual output voltage UG is taken as the input of a voltage measurement unit to obtain the synchronous power generator terminal feedback voltage U. According to the method, the parameter adaptability and robustness of a control system can be improved.

Description

technical field [0001] The invention relates to an excitation control method of a synchronous generator. Background technique [0002] The sensitive and fast excitation regulation system can not only improve the static stability and transient stability of the generator under external disturbance, but also protect the safety of the generator by rapidly de-excitation in case of an accident. Therefore, the generator excitation system is an important part of the power system, and its reliable operation directly affects the stability and power supply quality of the synchronous generator and even the entire power system. Therefore, effective control of the generator excitation system is crucial to the high-quality, high-reliability and stable operation of the entire power system. [0003] The excitation system itself is a strongly nonlinear and time-varying system. The PID control commonly used in industry has the advantages of simple structure, good robustness, and easy implemen...

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Problems solved by technology

[0004] Iterative learning and its application research in excitation control system (http: / / www.docin.com / p-1385703127.html), which improves the characteristics of the excitation controller through iterative learning, so that it has a strong ability to maintain synchronous motor However, the pure iterative learning control only uses the information of the current operation of the system, and is not robust to non-repeatable disturbances. For the sudden disturbance of the generator excitation system, the iterative learning control may produce large tracking error

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