兼顾微配网运行经济性与可靠性的智能软开关选址优化

以多微网经智能软开关(SOP)互联的主动配电网整体经济性为目标,开展选址研究.首先建立含SOP主动式配电网在正常工况下的约束模型,并充分计及实时电价、SOP和储能电池的运行维护费用建立目标函数.通过将原始的非凸非线性约束进行松弛和线性化处理,转化得到二阶锥规划模型,实现了对该非线性规划问题的高效求解.最后在约束条件下求解目标函数,综合对比不同方案下的配电网日运行经济性和节点电压偏移指标,得到最佳的SOP选址方案,证明了SOP在提升微配网经济性和可靠性方面的显著优势.

Sitting Optimization of Soft Open Point Considering Operation Economy and Reliability of Micro-distribution Network

Aiming at the overall economy of the active distribution network containing multiple microgrids connected by soft open points (SOPs), the sitting research is conducted. Firstly, the constraint model of the active distribution network containing SOPs under normal operation is established, and the objective function is set after fully considering the cost of real-time electricity price and the costs of the operation and maintenance of SOPs and energy storage batteries. On this basis, by relaxing and linearizing the original non-convex nonlinear constraints, a second-order cone programming model is obtained, which realizes the efficient solution of the nonlinear programming problem. Finally, the objective function is solved under the constraint conditions. The daily operation economy and node voltage deviation indices of the distribution network with different schemes are comprehensively compared, and the optimal sitting scheme of the SOPs is obtained, which verifes the significant advantages of SOPs in improving the economy and reliability of the micro-distribution network.