A kind of electric power system and method for peak regulation and frequency regulation thereof

Abstract

The invention discloses an electric power system and its peak regulation and frequency regulation method, comprising the following steps: obtaining the control conditions and frequency variation of the electric power system; The maximum heat release demand of the time period; calculate the peak-shaving capacity increment of the power system according to the maximum heat storage and maximum heat release demand; adjust the frequency of the power system according to the low-frequency signal in the frequency variation. Through the implementation of the present invention, for the power system with phase change heat storage station, the maximum peak-shaving capacity increment of the power system can be obtained. Due to the slow response and large heat storage capacity of the distributed phase change heat storage station, it can make up for the conventional Insufficient frequency modulation method can significantly reduce the spinning reserve capacity required by the power grid. The spinning reserve capacity saved due to the participation of distributed phase change heat storage stations in frequency regulation can be used for grid peak regulation, emergency backup, etc., which can further improve the safety of power system operation and reliability.

Description

technical field [0001] The invention relates to the technical field of peak regulation and frequency regulation, in particular to a power system and a method for peak regulation and frequency regulation thereof. Background technique [0002] In recent years, cogeneration units have developed rapidly, and the installed capacity has reached 300 million kilowatts, accounting for nearly 30% of the installed capacity of thermal power. In March 2016, the National Development and Reform Commission and the Energy Bureau jointly promulgated the "Management Measures for Cogeneration". In response to the lagging development of cogeneration, the central heating rate of cogeneration in large and medium-sized cities in the north is required to reach more than 60%. With the continuous advancement of energy conservation and emission reduction, the area of ​​central heating in my country is still increasing year by year. It is expected that more coal-fired units will undergo heating transfor...

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Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides a power system and its peak regulation and frequency regulation method to solve the constraints of steam volume and flow in heat storage devices such as heat pumps in the prior art, and the power generation and heat supply The restrictions between the two are more prominent, and the problem of limited peak shaving and FM capabilities

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