计及过程安全性的配电网重构开关顺序优化

配电网重构过程应采用合理、可靠的开关操作顺序以避免对配电网的稳定运行产生冲击。采用改进的二进制粒子群算法求取配电网重构解集,对迭代过程中的无效粒子进行随机性的坐标修正,提升搜索效率;提出配电网重构实施过程合环、解环应满足的安全性约束,并应用戴维南等效模型计算合环冲击电流;提出用于求解计及过程安全性的配电网重构开关顺序的递归算法,搜索过程遵循贪心策略;针对递归过程中的无效中间解,以二进制编码方式记录,避免重复计算。IEEE 33节点系统、PGE 69节点系统算例结果验证了所提方法的有效性。

Switch sequence optimization of distribution network reconfiguration considering process security

Rational and reliable switch operation sequence should be adopted in the process of distribution network reconfiguration to avoid impact on the stable operation of distribution network. An improved binary particle swarm optimization algorithm is used to obtain the solution set of distribution network reconfiguration, and the coordinates of invalid particles in the iterative process are modified randomly to improve the search efficiency. The safety constraints should be satisfied during loop closing and unwinding in distribution network reconfiguration are proposed, and Thevenin equivalent model is applied to calculate the surge current due to closing loop. A recursive algorithm is proposed for solving the switch sequence of distribution network reconfiguration with the consideration of process safety, and the greedy strategy is followed in the search process. The invalid intermediate solutions in the recursive process are recorded with binary coding to avoid repeated calculation. Case results of IEEE 33-bus and PG&E 69-bus systems verify the effectiveness of the proposed method.