考虑负荷变化的配电网架安全评估及其应用  

Safety Evaluation and Its Applications in Distribution Networks Considering Load Variation

作　　者：刘健[1] 司玉芳[2] 

机构地区：[1]陕西电力科学研究院,陕西省西安市710054 [2]西安理工大学自动化学院,陕西省西安市710048

出　　处：《电力系统自动化》2011年第23期70-75,共6页Automation of Electric Power Systems

基　　金：国家电网公司重大科技项目"智能配电网自愈控制关键技术研究与开发"~~

摘　　要：为了更好地对配电网的安全性和设备利用率进行评估,提出一种基于线性规划法求解任意接线、任意容量连通系的最大利用率的方法,提出一系列考虑负荷变化及N-1准则满足程度的评估指标,包括实时利用率、实时缺额率、平均利用率、平均缺额率、N-1准则满足时间比率、N-1准则满足程度、满足N-1准则的风险度和满足N-1准则的临界负荷调整比例,并给出了评估方法。结合实例论述了其典型应用,结果表明:所提出的评估指标为配电网设计、运行与改造提供了更多的参考信息,通过合理优化分段开关的安装位置,可以改善指标、提高利用率和N-1准则满足程度。To help better evaluate the safety and utilization of distribution networks,a linear programming-based approach to obtaining the maximum utilization ratio of distribution systems with arbitrary topologies and capacities is put forward.A series of safety indices considering load variation are proposed,including the real-time utilization ratio,real-time shortage ratio,averaged utilization ratio,averaged shortage ratio,N-1 criterion meeting to duration ratio,N-1 criterion meeting,N-1 criterion meeting risk,and regulating ratio of N-1 criterion meeting critical load.The steps of evaluation are suggested.Several examples are given to illustrate typical applications of the approaches proposed showing that it is feasible and can provide more information to planning,operation and engineering of distribution systems.It is also shown that the indices of utilization and extent for meeting N-1 criterion can be improved by optimizing the allocation of the sectionalizing switches on the feeders.

关 键 词：安全评估 N-1准则 设备利用率 多分段多联络 配电网 

分 类 号：TM715[电气工程—电力系统及自动化]