Thermal power plant synchronous generator excitation system optimal parameter setting method based on adaptive compass search algorithm

Abstract

The invention provides a thermal power plant SG excitation system optimal parameter setting method based on an ACS algorithm. The method comprises the following specific implementation steps: firstly,building an SG optimization model; secondly, inputting a frequency deviation caused by a power grid fault into an excitation system configured with a PSS, and outputting an excitation voltage ufd after adjustment; and finally, feeding the ufd back to the SG, and carrying out next iteration, wherein a PSS parameter and an excitation gain parameter are set by adopting the ACS algorithm. And the above process is continuously circulated till that the algorithm converges to obtain the optimal setting parameter. The ACS algorithm effectively solves a problem that the PSS parameter and the excitation gain parameter of the thermal power plant SG are difficult to set optimally in a practical application. The method has the following two advantages that firstly, a self-adaptive sequence based on anexploration direction is introduced into the algorithmso that a global search capability is remarkably improved, and the PSS parameter and the excitation gain parameter are prevented from falling into local optimum; and secondly, the ACS algorithm adopts a single-agent search mechanismso that the algorithm can approach the optimal PSS parameter and the excitation gain parameter at a higher speedand higher convergence stability;

Description

Technical field [0001] The present invention relates to the technical field of power system control, in particular to an optimal parameter setting method of a synchronous generator (synchronous generator, SG) excitation system in a thermal power plant based on an adaptive compass search (ACS) algorithm to realize SG in the power grid Participate in the optimal frequency modulation of the power system under failure. Background technique [0002] In recent years, my country's power industry has developed rapidly, and various power generation technologies have provided more power resources for production and life. In order to ensure the stability and safety of power supply, it is necessary to pay more attention to the power generation process of thermal power plants to ensure that their generator sets can always be maintained in the best operating state and maintain high production efficiency. SG is the most important part of the generator set of thermal power plant, its reliabilit...

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Problems solved by technology

[0004] In order to solve the problem that the PSS parameters and excitation gain parameters of the thermal power plant SG excitation control are difficult to be optimally adjusted in practical applications, the present invention proposes an optimal parameter setting method for the SG excitation system of the thermal power plant based on the ACS algorithm, so as to realize the SG in the power grid Participate in power system optimal frequency regulation under fault conditions

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