考虑冰灾环境的配电网态势感知和薄弱环节辨识方法

A New Method for Situation Awareness and Weakness Identification of Distribution Network Considering Ice Disaster

建立了一种考虑冰灾环境的配电网态势感知框架及薄弱环节辨识方法。通过综合考虑气象、地理系统、电力系统及社会资源的多源信息并分析其相关性,提出包含线路段实时风险态势、供电设备风险态势、防御风险态势、灾害故障态势和网络拓扑态势的综合态势感知框架,改变了以往仅通过线路覆冰情况预测配电网故障的局限性,修正了配网线路覆冰模型,并构建了线路段综合薄弱性指标(linesegment comprehensive vulnerability index,LSCVI)衡量线路段的薄弱程度,提升了配电网薄弱环节的辨识能力。最后通过东北某受灾区的实例分析,验证了所提方法的正确性和有效性,对冰灾时配电网的主动防御具有重要意义。

A multi-source situation awareness framework and a weakness identification method for distribution network considering ice disaster are proposed in this paper. Based on analysis of multi-source information from geographic system, meteorological system, power system and social resources, this paper proposed an integrated situation awareness framework including line segments real-time risk, power supply equipment risk, defense risk, disaster failure and network topology, and overcame the limitation of predicting fault probability only through line icing. The ice model of distribution line was modified and a line segment comprehensive vulnerability index (LSCVI) was established to measure the degree of weakness and improve the identification ability of weakness. Finally, correctness and effectiveness of the proposed method were verified through case study of a large city in Northeast China. It is of great significance for timeliness and accuracy of distribution network active defense toward ice disaster.