计及负荷变化的配电网故障恢复区间数灰色关联决策

Distribution network service restoration based on interval number grey relation decision-making considering load change

考虑到负荷变化对恢复决策的影响,提出了配电网故障恢复的区间数灰色关联决策方法。引入负荷恢复量、负荷容量裕度、开关操作次数、负荷转移量、负荷均衡率5个评价指标,给出了评价指标的区间数表示法。综合利用故障恢复的主、客观信息对评价指标进行组合赋权,采用层次分析法主观赋权、区间数熵权法客观赋权。在此基础上,利用区间数灰色关联决策方法对配电网故障恢复方案进行区间评价。算例测试表明:该方法能有效解决负荷变化情况下的恢复方案评估问题。

Considering the impact of load change on the distribution network service restoration, an interval number grey relation decision-making method for distribution network service restoration is proposed. Five evaluation indices such as the quantities of restored load, the margin of load capacity, the number of switching operations, quantities of transferred load and rate of load balancing are introduced, and the interval number representation of distribution network service restoration evaluation indices are provided. The indices＇ weights are determined by combination of the subjective and objective information, which uses the analytic hierarchy process method to objective weight and the interval number entropy weight method to subjective weight. On this basis, the interval number grey relation decision-making method is applied to make the interval evaluation for service restoration scheme. The example test indicates that the proposed method can effectively solve the distribution network service restoration scheme evaluation with load change.