Heat-and-power cogeneration unit combining electric heat pump and heat storage device and peak regulation method thereof

Abstract

The invention belongs to the technical field of thermoelectricity, and relates to a heat-and-power cogeneration unit combining an electric heat pump and a heat storage device and a peak regulation method thereof. The heat-and-power cogeneration unit basically comprises a turbine, the electric heat pump and the heat storage device and can be used for peak regulation in a power grid. Through combination of the electric heat pump and the heat storage device, a heat storage mode and a heat release mode can be switched according to power generation dispatching requirements of a thermal power plant, and the purposes that heating is guaranteed while the grid power generation quantity of the thermal power plant is changed are achieved; and steam exhaust heat is recovered through a condenser and an evaporator of the electric heat pump, and the heating cost of the thermal power plant is lowered. According to the heat-and-power cogeneration unit combining the electric heat pump and the heat storage device and the peak regulation method thereof, the power generation peak regulation range of the thermal power plant is expanded, the electric power regulating range of the power grid is expanded accordingly, more grid power generation time is provided for wind electricity and other renewable energy sources, and the problem of wind abandoning is finally solved; and for a thermal power plant with the limited heating capacity, steam exhaust heat can be recovered by means of the heat-and-power cogeneration unit combining the electric heat pump and the heat storage device and the peak regulation method thereof, and the external heating capacity can be promoted. The heat-and-power cogeneration unit combining the electric heat pump and the heat storage device and the peak regulation method thereof are suitable for participating in power grid peak regulation.

Description

technical field [0001] The invention belongs to the technical field of thermoelectricity, and in particular relates to a heat and power cogeneration unit combined with an electric heat pump and a heat storage device and a peak regulation method thereof. Background technique [0002] The proportion of renewable energy such as wind power in my country's energy structure is gradually increasing and it is mainly distributed in the northern region. In the northern region of my country, the generator sets are mainly cogeneration and adopt "heat-based power" operation. The two types of power generation loads in the time scale The overlap with the spatial scale has led to increasingly serious problems such as "abandoned wind". How to increase the power generation adjustment range of cogeneration units to achieve "thermoelectric decoupling" so that the grid can absorb more renewable energy such as wind power, and at the same time improve the energy utilization efficiency of cogenerati...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a combined heat and power unit combined with an electric heat pump and a heat storage device and its peak regulation method to solve the need for a heat storage device capable of recovering the heat of exhaust steam and having a heat storage function mentioned in the background art. Problems of Thermal Power Units Participating in Power Grid Peak Regulation

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