To address the optimal design of a wind-solar complementary integrated energy system (IES)
a coordinated optimization method of system structure and equipment capacity is proposed. A layered model for IES is firstly established using the principle of energy cascade utilization. The coordinated optimization problem of system structure and capacity that minimizes annual total cost is then formulated as a bi-level iterative optimization problem. The upper level optimizes the investment in renewable energy resources
energy conversion and storage equipment
and their interconnection scheme. The lower level optimizes the capacity and operation scheme of the selected equipment. A genetic algorithm and commercial solver CPLEX are applied to solve the problem. Finally
simulation results show that the proposed method reduces the annual total cost by 8.7% compared with the capacity configuration method based on the predefined system structure
which verifies the effectiveness of the proposed method.
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references
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