考虑动态网络重构的主动配电网优化运行策略

Optimization Operation Strategy of Active Distribution Network Considering Dynamic Network Reconfiguration

动态网络重构(DNR)技术可以有效降低配电网的经济运行成本和可再生分布式电源(RDG)的弃风/光率。建立一种考虑DNR的主动配电网优化运行模型,该模型以配电网综合运行成本最低为目标,综合考虑DNR开关、RDG、无功补偿装置等可调资源,在满足配电网运行约束的条件下有效提升配电网的RDG消纳率;提出基于二阶锥松弛及变量乘积线性化的模型转化方法,通过对约束条件中的非凸源进行凸化处理,将原始非凸优化模型转化为一个混合整数二阶锥规划(MISOCP)问题,从而大大降低求解的复杂度;最后采用扩展IEEE 33节点配电网系统进行仿真计算,计算结果证明了所提模型及其转化方法的有效性。

The dynamic network reconfiguration(DNR)technology can effectively minimize the overall economic operation cost of the distribution network and its curtailment rate of renewable distributed generation(RDG).In this paper,an active distribution network optimization operation model considering DNR was established.Herein,the lowest comprehensive operation cost of distribution network was taken as the goal,and the dispatchable resources were considered such as DNR switches,RDG and reactive power compensation device.The absorption rate of RDG thus could be effectively improved,while the distribution network operation constraints were satisfied.The model transformation method based on the second-order relaxation and variable-product linearization was proposed.Consequently,the non-convex sources in the constraints were transformed into convexity,and the optimization model was transformed into a mixed integer second-order cone programming(MISOCP)problem.Thus,the complexity of solving process was greatly reduced.Finally,the extended IEEE 33-node distribution network was adopted to conduct simulation calculation.The results demonstrate the validity of the proposed model and its transformation method.