考虑电力二次系统影响的智能配电网综合可靠性评估方法  

Comprehensive Reliability Evaluation Method for Smart Distribution Network Considering Influence of Secondary Power System

作　　者：夏勇军 肖繁 XIA Yongjun;XIAO Fan(Electric Power Research Institute of State Grid Hubei Electric Power Co.,Ltd.,Wuhan 430077,China)

机构地区：[1]国网湖北省电力有限公司电力科学研究院,湖北省武汉市430077

出　　处：《电力系统自动化》2020年第23期165-172,共8页Automation of Electric Power Systems

基　　金：国家重点研发计划资助项目(2016YFB0900600)。

摘　　要：智能配电网可靠性分析包括一次系统和二次系统2个方面。文中根据配电网保护、故障区段定位和网络自动重构等二次系统的功能特点,提出一种考虑电力二次系统的智能配电网综合可靠性量化评估新方法。首先,根据配电网网架结构建立未考虑电力二次系统影响的智能配电网一次系统可靠性计算模型。在此基础上,根据区域集中式保护的动作特征和容错性能,建立了保护系统整体可靠性模型和区域保护在开关元件处的等效可靠性模型。然后,在开关元件处建立考虑电力二次系统影响的综合可靠性模型,实现对智能配电网各区域与各节点的综合可靠性评估。最后,通过比较可靠性指标验证了所提方法的有效性。The reliability analysis of smart distribution network includes two aspects:the primary system and the secondary system.According to the functional characteristics of the secondary system such as distribution network protection,fault zone location and automatic network reconfiguration,this paper proposes a new quantitative evaluation method for the comprehensive reliability evaluation of smart distribution network considering the secondary power systems.First,according to the structure of the distribution network,the reliability calculation model of the primary system of smart distribution network is established without considering the influence of the secondary power system.On this basis,according to the operation characteristics and faulttolerance performance of the regional centralized protection,this paper establishes the overall reliability model of the protection system and the equivalent reliability model of the regional protection at the switching devices.Then,a comprehensive reliability model considering the influence of the secondary power system is established at the switching devices to realize the comprehensive reliability evaluation of each area and each load point of the smart distribution network.Finally,the effectiveness of the proposed method is verified by comparing reliability indicators.

关 键 词：智能配电网 电力二次系统 可靠性 区域保护 等效可靠性模型 

分 类 号：TM76[电气工程—电力系统及自动化]