弹性配电网恢复力快速评估的解析方法研究

A Study on the Fast Assessment of the Resilience of Elastic Distribution Systems with an Analytical Method

该文从解析方法入手,开展了对弹性配电网恢复力评估指标与方法的相关研究。引入系统功能图以及节点元胞,简化网络拓扑复杂度,获取各个元胞的灾害中停电时间期望、灾害后维修时间期望以及系统的失负荷期望值3类评估指标;通过供能通路,将元胞在自然灾害各阶段的响应表述为概率事件并进行解析表达,得到可用计算机实现的评估指标解析式;基于IEEE 13和IEEE 123节点算例进行测试分析,并结合评估结果,提出相应提升配电网弹性的措施。算例表明:所提解析方法可快速评估配电网恢复力,具有较强适用性。

Utilizing an analytical method,this paper delves into the indices and assessment methodologies for resilience in elastic distribution systems.Beginning with an examination of the distribution network topology,the paper introduces a system function curve and a cell model to reduce the complexity of the network.The paper identifies three key indices:the expected duration of power outages during extreme disasters for each cell,the anticipated repair time following such disasters and the expected loss of load of the system to gauge the system’s response.Furthermore,the paper delineates the probability of cell responses at various stages of an extreme disaster using energy supply paths,deriving an analytical expression for an assessment index suitable for computational analysis.The paper conducts tests based on the IEEE 13 and IEEE 123 node examples and,in conjunction with the assessment results,proposes corresponding measures to enhance the resilience of distribution networks.The examples demonstrate that the proposed analytical method can rapidly assess the recovery power of distribution networks and has strong applicability.