Synchronous generator excitation control method based on fuzzy sliding mode

Abstract

The present invention discloses a synchronous generator excitation control method based on a fuzzy sliding mode. The method comprises: the step 1, establishing each unit simplification model and a fuzzy sliding mode controller model of a synchronous generator excitation system; the step 2: taking the error e1 of the feedback voltage U and the given voltage U0 at the end of a synchronous generator as the input of a sliding mode variable structure control portion, and taking the e1 and the (img file='DDA0001336670490000011. TIF' wi='36' he='63'/) as the input of a fuzzy control portion; the step 3: obtaining an excitation voltage Uf after overlapping of the fuzzy control output us and a sliding mode variable structure; the step 4: obtaining the excitation voltage UF of the synchronous generator through processing the feedback voltage U by employing a power amplification unit; and the step 5, taking the UF as the input of the synchronous generator unit, and obtaining the actual output voltage UG of the synchronous generator, wherein the actual output voltage UG of the synchronous generator is taken as the input of the voltage measurement unit to obtain the feedback voltage U at the end of the synchronous generator. The synchronous generator excitation control method based on the fuzzy sliding mode ensures the excellent static and dynamic response capability of the generator system.

Description

technical field [0001] The invention relates to an excitation control method of a synchronous generator based on fuzzy sliding mode. Background technique [0002] The development of electric power is closely related to the national economy, and ensuring the safety of large power grids has a decisive impact on the stable operation of the national economy. A large-scale power grid is generally composed of several generator sets running in parallel. The safety and control performance of the generator set and the grid operation affect and restrict each other, and the generator excitation system is the most important link between the generator set and the grid. 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] Since the generator excitation control system is a time-varying, multi-time-delay and highly nonlinear complex control system, when the operating condit...

AI Technical Summary

Problems solved by technology

At present, the PID control commonly used in industry has the advantages of simple structure, good robustness, and easy implementation, but it is difficult to adapt to the complex working conditions under the sudden disturbance of the generator. Some advanced control methods are introduced into the excitation control, but due to its Relying on precise mathematical models, it is difficult to achieve high-quality control of the generator excitation system

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