考虑风险管控的含智能软开关主动配电网随机运行优化方法

Stochastic Operation Optimization Method for Active Distribution Networks with Soft Open Point Considering Risk Management and Control

智能软开关用于连接2条或多条馈线,其灵活的无功/有功功率调节能力能有效地减轻电压偏差,提升配电网的运行质量。文中考虑多种调节手段协调优化,包括智能软开关、有载分接开关、投切电容器组、储能系统以及需求响应。在控制电压幅值处于安全运行范围内的基础上,最大程度提升配电网的运行效率。为了应对系统多重随机性,妥善规避随机因素带来的实际运行风险,结合随机优化和条件风险价值理论,提出了考虑风险管控的主动配电网随机运行优化方法,实现了预期运行成本与运行风险间的平衡。然后,通过二阶锥转化和线性化将原始模型转化为混合整数二阶锥规划模型,使得模型更易于求解。最后,在修改的IEEE 33节点系统上的测试结果验证了所提方法的有效性。

The soft open point(SOP)is used to connect two or more feeders.Its flexible reactive/active power adjustment capability can effectively mitigate the voltage deviation and improve the operation quality of the distribution network.This paper considers the coordination and optimization of multiple adjustment methods including SOPs,on-load tap changers,switching capacitor banks,energy storage system(ESS)and demand response.On the basis that controls voltage amplitude within the safe operation range,the effective operation of the distribution network is realized.In order to cope with the multiple randomness of the system and properly avoid the actual operation risks caused by random factors,combined with the theories of the stochastic optimization and conditional risk-at-value(CVaR),this paper proposes a method for stochastic operation optimization of active distribution networks considering risk management and control to achieve a balance between the expected operation cost and the operation risk.Then,the original model is transformed into a mixed-integer second-order cone programming model through the second-order cone transformation and linearization.It makes the model easier to solve.Finally,the test results on the modified IEEE 33-bus system verify the effectiveness of the proposed method.