Abstract

In this paper, the multi-energy complementary system coupled with wind power, photovoltaic, hydropower, thermal power and energy storage device is taken as the research object, and the optimal operation strategy is discussed. Firstly, a multi-objective optimization operation model is constructed with the objective of maximum operating revenue, minimum energy abandonment cost and minimum output fluctuation, which considers the impact of the operation mode of energy storage system on the coupling energy system. Then, the load tracing degree, the hydropower secondary peaking capacity and the unit coal consumption of power generation are selected as the evaluation indexes of the complementary characteristics of the coupling energy system. Finally, the IEEE 14-node 5-machine system is connected with WPP, PV, HS and ESD to form a simulation system. The results show that: (1) the multi-energy complementary system can make full use of the complementary characteristics of different power sources to promote the grid-connection of wind power and photovoltaic power generation. (2) energy storage system operation mode directly affects the system operation results. The proposed model can provide effective decision-making tools based on external resource conditions and their own wishes.

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