改进的分步最优法在配电网开关配置中的应用

串接分段开关将馈电线分段,在技术上可以减少故障时间,缩小故障范围,提高配电网自动化程度。提出了一种开关配置模型,能够确定配置开关的总数以及每个开关的最佳安装位置,并采用改进的分步最优法进行求解。使开关配置在综合考虑设备投资、运行维护费用及系统可靠性基础上得到最佳的综合效益。采用改进的分步最优法求解多目标非线性优化问题,既避免了穷举法的“组合爆炸”问题,又能快速地得到最优解,而且能够非常灵活地处理任何复杂的树型馈线结构配电网。算例结果表明该算法的快速和有效性。

Application of improved multi-step optimization algorithm in sectionalizing switch allocation in distribution network

Using sectionalizing switches to divide feeder into sections,from the technical point of view,can reduce the outage time and area,and raise the automation level of the system. An opti-mization model is proposed,which can determine the optimal number of sectionalizing switches and their locations in distribution networks. It applies the improved multi-step optimization algorithm in allocation optimization of sectionalizing switch to achieve the optimum beneficial result based on investment,maintenance and reliability costs. For non-linear,non-differentiable objective functions,the use of improved multi-step optimization algorithm not only avoids the "combinatorial optimization problems" but also increases the speed in dealing with the complex tree-type structure of feeders. Test results prove the quickness and effectiveness of the proposed method.