Fused salt energy storage thermal power frequency modulation and peak regulation system and method

Abstract

The invention discloses a fused salt energy storage thermal power frequency modulation and peak regulation system and a method. The fused salt energy storage thermal power frequency modulation and peak regulation system comprises a bidirectional heat exchanger, one end of the pipe side of the bidirectional heat exchanger is connected with a cold fused salt pump, the other end of the pipe side of the bidirectional heat exchanger is connected with a hot fused salt pump, one end of the shell side of the bidirectional heat exchanger is connected with a rear pipeline of a thermal power generating unit superheater, and the other end of the shell side of the bidirectional heat exchanger is connected with a rear pipeline of a water feed pump and a heating steam extraction pipeline of a deaerator;the cold fused salt pump is connected with a cold fused salt tank, and low-temperature fused salt is pumped to the pipe side of the bidirectional heat exchanger and flows into a hot fused salt tank through the hot fused salt pump; and high-temperature fused salt in the hot fused salt tank is pumped to the pipe side of the bidirectional heat exchanger through the hot fused salt pump and flows intothe cold fused salt tank through the cold fused salt pump. By utilizing the advantages of good flowability and high heat capacity of the fused salt, the difference of energy in production and requirements in a thermal power generation process is efficiently stored and released by using the fused salt, and the energy exchanges heat with water and steam of the thermal power generating unit, so thatthe purpose of quickly and stably adjusting the thermal power generating unit is achieved.

Description

technical field [0001] The invention relates to the technical field of frequency regulation and peak regulation of thermal power generation, in particular to a thermal power frequency regulation and peak regulation system and method for molten salt energy storage. Background technique [0002] Thermal power generation is the most important way for humans to obtain electricity. The Rankine cycle that uses fuel and water vapor to drive a steam turbine is the most widely used thermodynamic cycle power generation system. With the continuous growth of human demand for electricity, the capacity of the power system has become very large, and the demand for electricity loads has become more and more diverse. It does not have the ability to adjust, so that the adjustment of the power grid largely depends on the traditional thermal power generation system. However, large-scale thermal power generation uses burning coal as the source of heat. The combustion system of power plant boile...

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Problems solved by technology

However, large-scale thermal power generation uses burning coal as the source of heat. The combustion system of power plant boilers is huge and complex, and it is difficult to respond to the frequent and large-scale frequency and peak regulation requirements of the power grid, which reduces the safety and flexibility of power grid operation. Although through some technical transformation and Improving the control capability of the power station control system can alleviate this contradiction, but the adjustment difficulty of large thermal power units is not a fundamental solution.

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