计及合环约束的分布式电源与配电网联合优化

针对分布式电源(DG)出力不稳定以及线路负荷波动大对电网造成的不利影响,提出了一种计及合环约束的分布式电源与配电网联合优化模型。上层模型考虑线路拓扑重构,对DG进行选址定容;下层模型计及DG出力的时序特性,动态调整线路拓扑,进一步提升对于DG的接纳,并且优化线路的运行。同时,在重构的过程中考虑合环电流约束以确保方案的可行性,并采用二阶锥松弛将原问题转换为混合整数二阶锥规划。最后,在MATLAB环境下通过cplex求解器,以IEEE33节点模型为例开展仿真分析,验证了所提方法的有效性。

Joint Planning of Distributed Generation and Distribution Network Considering Closing Constraint

Aiming at the adverse effects of unstable output of distributed generation (DG) and large line load fluctuation on the power grid,a combined optimization model considering the timing characteristics of DG is proposed.The upper level model considers line topology reconstruction and determines the location and capacity of DG.The lower level model takes into account the characteristics of DG output,dynamically adjusts the line topology,further improves the integration of DG and optimizes the operation of the line.At the same time,the loop current constraint is considered during the reconstruction process to ensure the feasibility of the scheme,and second-order cone relaxation is used to transform the original problem into mixed integer second order cone programming (MISOCP).Finally,the effectiveness of the proposed method is verified through simulation analysis using the IEEE33 node model by a cplex solver in the MATLAB environment.