Study on the influence of heat pump and heat storage device on the accommodation of wind power curtailment in the integrated energy system

Abstract

In order to solve the wind curtailment problem in an integrated energy system (IES), this paper starts from the structure of the IES and analyzes the related contents of heat pump, heat storage device and cogeneration units in the IES. At the beginning of this article, the principle, performance coefficient model and energy efficiency curve of the heat pump are first studied. Correspondingly, the principle of heat storage device and the model of heat storage and release strategy are studied. Then the principle and operating characteristic model of cogeneration units are studied. Based on the principle of each part, combined with the operating constraint conditions of the IES, the IES including heat pump, cogeneration units and heat storage device is constructed. An example is used to simulate the operation in the Energy Plan software, different scenarios were established in the simulation process for analysis to study the influence of heat pumps on the accommodation of curtailed wind power in the IES. The simulation results show that the heat pump can promote the accommodation of wind power, reduce the curtailment rate and the cost of power generation to a certain extent in the IES. From the results of simulation analysis, it can also be concluded that the IES including both heat pump and heat storage device has better wind power accommodation capacity.