Wei Bin, Gao Chao, Cao Huazhen, Wang Changwei, Wu Jiekang, and Li Hongling
Power systems, reserve capacity, coordinative aggregation of renewable energy, optimisation alternation, the expected energy not supplied, nonlinear integer programming
In the new energy environment, the uncertainty of load demand and new energy power generation has put forward higher requirements for reserve capacity, and the collaborative aggregation of new energy and reserve alternation are increasingly receiving attention. The idea of this article is to alternate coal-fired generators with photovoltaic power generation systems and collaborate with other types of power generation units to achieve optimal alternation of reserve capacity in the power system. Using the expected energy not supplied (EENS) and operating cost to construct a comprehensive alternative benefit evaluation index, and taking its minimum value as the objective function, an optimisation model for the alternation of reserve capacity in the power system is constructed. The piecewise linear theory is used to linearise the objective function with quadratic characteristics, and the branch and bound algorithm is used to solve the nonlinear integer programming problem constructed in this paper. Taking the IEEE-30 system as a simulation example, the calculation results show that alternating coal-fired generators with photovoltaic power generation systems in reserve services can increase comprehensive alternation benefits and reduce reserve capacity.
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