Solid heat storage power generation peak and frequency modulation system for thermal power plant and working method

Abstract

The invention discloses a solid heat storage power generation peak regulation and frequency modulation system for a thermal power plant and a working method. The system comprises a solid heat storage electric boiler, a water supply pipeline and a steam connection pipeline thereof and a unit peak regulation control unit. The solid heat storage electric boiler comprises solid heat storage bricks, a peak and frequency regulation electric heater, a high-temperature-resistant fan and an air-water heat exchanger. The peak and frequency regulation electric heater supplies power to heat the solid heat storage bricks in an off-peak electricity period, and the high-temperature-resistant fan sucks air into the solid heat storage electric boiler to exchange heat with the solid heat storage bricks in a non-off-peak electricity period to form hot air. The wind-water heat exchanger heats water in the water supply pipeline into superheated steam through hot air, and the superheated steam is fed into the steam turbine to drive the generator to generate electricity. The system has the beneficial effects that surplus electric power of the thermal power plant is stored in the solid heat storage bricks in the electricity consumption valley period, the generating capacity of the thermal power plant is increased in an auxiliary mode in the electricity consumption peak period, and therefore heat storage peak regulation and frequency modulation of the thermal power plant are achieved.

Description

technical field [0001] The invention relates to the field of energy utilization, in particular to a peak-shaving and frequency-regulating system and working method for solid heat storage power generation in a thermal power plant. Background technique [0002] Energy storage power stations are an urgent need to improve the efficiency, safety and economy of conventional energy generation and transmission. In order to meet the requirements of power load, the current power generation installed capacity and grid capacity are built according to the maximum demand. As the peak-to-valley difference of the power grid increases day by day, it will inevitably lead to the shutdown of power generation units or low-load operation during off-peak power consumption and the reduction of grid capacity. waste. In 2011, the total load factor of conventional coal-fired generating units nationwide was only 51.8%, and the load utilization factor of the power grid was also less than 55%. The use ...

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Problems solved by technology

In order to meet the requirements of power load, the current power generation installed capacity and grid capacity are built according to the maximum demand. As the peak-to-valley difference of the power grid increases day by day, it will inevitably lead to the shutdown of power generation units or low-load operation during off-peak power consumption and the reduction of grid capacity. waste

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