Electric heating comprehensive energy storage peak shaving system of coal power unit and working method

Abstract

The invention discloses an electric heating comprehensive energy storage peak shaving system of a coal power unit and a working method. A boiler, a steam turbine, a power generator and an auxiliary system of the coal power unit are coupled with a fused salt energy storage system, so that electric energy and high-temperature steam generated by the coal power unit can be stored in the fused salt energy storage system; and heat energy in the fused salt energy storage system can be output for heat supply and steam supply, or high-temperature steam is generated to be fed into the steam turbine again for power generation, flexible storage and flexible release of electric energy and heat energy are achieved, the adjustment flexibility of the coal power unit is improved, the capacity of the coal power unit for absorbing renewable energy for power generation can be effectively improved, and China is helped to achieve carbon peak reaching and carbon neutralization.

Description

technical field [0001] The invention belongs to the technical field of energy storage for coal-fired power units, and in particular relates to a peak-shaving system and working method for electric-thermal comprehensive energy storage of coal-fired power units. Background technique [0002] With the rapid development of wind power and photovoltaic power generation, the demand for flexible power sources in the power grid continues to increase, and the positioning of coal power in the power grid system is gradually changing from a power-based power source to a power-based and power-regulated power source. At present, units with better coal quality and equipment conditions can expand the unit load adjustment range from 50% to 100% of rated load to 30% to 100% of rated load through flexible transformation, and the increased 20% of rated load adjustment range can eliminate New energy power with the same capacity. However, some units are affected by coal quality and equipment cond...

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Problems solved by technology

[0006] In the context of new energy power consumption, in order to solve the problem of energy storage or heat storage of coal-fired power units in the non-heating period in the northern region, and the energy storage problem of units without industrial steam supply in the southern region, it is urgent to study a set of feasible solutions. A device that stores electrical energy or thermal energy and releases it at any time, and at the same time improves the conversion efficiency of the energy storage device as much as possible. At present, there are few related studies

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