Energy storage frequency modulation method, device and system, computer equipment and storage medium

Abstract

The invention relates to an energy storage frequency modulation method, which comprises the following steps of receiving an AGC command, and determining an expected output value and a response time according to the AGC command; acquiring a set output value, and computing a difference value of the expected output value and the set output value; determining an energy storage mode based on a preset difference value threshold, a preset response time, the difference value and the response time; and sending a control instruction to a corresponding energy storage device based on the energy storage mode, and controlling the output of the corresponding energy storage device. Through the method, different energy storage modes can be selected according to different situations, so that the frequency modulation performance of a generator set is guaranteed, and meanwhile, the electricity cost is reduced. The invention further provides an energy storage frequency modulation device and system, computer equipment and a storage medium.

Description

technical field [0001] The present application relates to the field of electric power technology, in particular to an energy storage frequency modulation method, an energy storage frequency modulation device, an energy storage frequency modulation system, computer equipment and a storage medium. Background technique [0002] With the rapid development of new energy power generation and the grid connection of a large number of new energy generating units, the structure of the power system has changed. New energy power generation is limited by functional specifications and other reasons. At present, it basically does not have the frequency regulation function. With the gradual increase in the proportion of new energy generating sets, the relative inertia ratio of the entire system decreases, and the available frequency regulation resources are getting less and less. The system frequency The regulation ability has declined significantly, and the frequency stability of the power...

AI Technical Summary

Problems solved by technology

The current thermal power unit uses electrochemical energy storage to participate in the AGC joint frequency regulation of thermal power plants. The electrochemical energy storage system has a fast adjustment speed, high adjustment accuracy, and has fast and accurate response capabilities. It can be used for joint frequency modulation of thermal power units and can achieve good results; However, in this method, the requirements for electrochemical energy storage batteries are relatively high, and the energy storage battery loss is high, resulting in high cost per unit of electricity.

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