Research on the control strategy of phase-change heat storage station with automatic generation system in power network peak regulation and frequency modulation

Abstract

In this paper, the operation strategy of thermal power units after the configuration of phase change heat storage station is put forward, and the mathematical model for calculating the peak-shaving capacity of thermal power units after the allocation of phase change heat storage stations is established. Based on the analysis of frequency requirements of electric power system, puts forward the analysis of high frequency and low frequency demand method by using the discrete Fourier transform, and the actual system all day long the proportion of high frequency components are quantitatively analyzed. Analyzes the effect of two typical 300MW and 200MW heating units in Northeast China on improving peak shaving capacity after installing heat storage stations. The results show that the peak shaving capacity of the two units can be increased by 21% and 14% at a given heat load level in the middle heating period. And based on the actual system data, the paper simulates and analyzes the FM strategy of energy storage participating in automatic generation control (AGC). The results show that the flexible allocation of energy storage resources based on area regulation requirement (ARR) has a better FM effect.