Comprehensive frequency modulation and peak regulation system of coal-fired power plant

Abstract

A comprehensive frequency modulation and peak regulation system of a coal-fired power plant comprises a heat accumulator, a heat accumulator cold water pipeline, a heat accumulator hot water pipeline,a condensate water return pipeline, a condenser, a steam turbine, a generator connected with the steam turbine, an electric heating conversion device connected with the generator through a power transmission line, a heat storage heater with one side connected with the electric heating conversion device and the other side connected with the heat accumulator cold water pipeline and the heat accumulator hot water pipeline through a heat storage pipeline, a heating network heater connected with the heat accumulator cold water pipeline and the heat accumulator hot water pipeline through a heat release pipeline, a condensate pump, a shaft seal heater with one end connected with the condensate pump and the other end connected with a condensed water supply pipe, a low-pressure heater, a deaerator, a water supply pump and a high-pressure heater. The system not only can meet the peak regulation requirement of the coal-fired power plant, but also can meet the frequency regulation requirement ofa large power grid, simultaneously can improve the utilization rate of existing heat accumulator equipment and obviously improves the flexibility of the coal-fired power plant. The system can be widely applied to flexible transformation of the coal-fired power plant.

Description

technical field [0001] The invention relates to a comprehensive frequency and peak regulation system of a coal-fired power plant, which can be widely used in the flexible transformation of the coal-fired power plant. Background technique [0002] Energy is the basis for the survival and development of human beings. With the development of society and economy, the demand for energy continues to increase, and the development and rational use of energy has attracted more and more attention. Coal-fired boilers used for heating have gradually withdrawn from the stage of history. Therefore, there is an urgent need for a clean green energy source for heating and heating. With the adjustment of my country's economic policy, the structure of electricity consumption has changed a lot. The electricity consumption of light industry and municipal life has been rising continuously, and the proportion of nighttime electricity consumption of heavy industry has been gradually reduced. From ...

AI Technical Summary

Problems solved by technology

At present, the peak-shaving technology of electrode boilers combined with heat accumulators can only be applied in the heating season, and a large number of heat accumulators are idle in non-heating seasons, resulting in waste of resources

Moreover, the current heat accumulator energy storage technology can only be used for peak regulation in power plants, and is powerless to meet the frequency regulation needs of large power grids.

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