Frequency modulation parameter optimization method for pumped storage unit

Abstract

The invention discloses a frequency modulation parameter optimization method for a pumped storage unit, and the method comprises the steps: constructing a simulation model of a to-be-modulated pumpedstorage unit, and the simulation model comprising a fractional order PID controller and a fuzzy inference module; applying preset frequency disturbance to the simulation model, and carrying out optimizing through a search algorithm to obtain an optimal frequency modulation parameter of the controller and an optimal membership function of the fuzzy inference module; calculating and controlling thefuzzy inference module to adopt an optimal membership function based on the unit frequency deviation and the differential of the unit frequency deviation under the optimal frequency modulation parameter to obtain the correction amount of the optimal frequency modulation parameter; and correcting the optimal frequency modulation parameter by adopting the correction amount to complete optimization of the frequency modulation parameter. According to the method, the fuzzy fractional order PID controller is introduced, the frequency modulation parameter can be obtained through optimization according to the frequency deviation adjusting algorithm, rotating speed fluctuation can be effectively and rapidly restrained, and the problem that the frequency modulation efficiency is low due to the factthat only the frequency modulation parameter obtained through algorithm optimization is adopted for frequency modulation control is solved.

Description

technical field

[0001] The invention belongs to the field of frequency regulation of a pumped storage unit, and more specifically relates to a method for optimizing frequency regulation parameters of a pumped storage unit. Background technique

[0002] The unit regulation system is the key to control the primary frequency regulation of the pump turbine unit. The optimization of the frequency regulation parameters is very important. Among them, the type of controller and the difference in regulation algorithm are of great significance to the stability of the frequency and power of the system. In the optimization of the frequency regulation parameters of the controller, when the regulation system of the pump and turbine is greatly disturbed, some parameters of the regulation system will change greatly, some of which will exceed their linear range. In addition, pumped-storage units have complex working conditions, frequent start and stop, and the "S" characteristic is particula...

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