智能配电网N–1安全边界拓扑性质及边界算法  

Topological Characteristics and Algorithm of N-1 Security Boundary for Smart Distribution Network

作　　者：肖峻[1] 贡晓旭[1] 贺琪博 苏步芸 王成山[1] 

机构地区：[1]智能电网教育部重点实验室(天津大学),天津市南开区300072

出　　处：《中国电机工程学报》2014年第4期545-554,共10页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51277129);国家重点基础研究发展计划项目(973项目)(2009CB219703)~~

摘　　要：为研究智能配电网N?1安全边界的拓扑性质,提出了基于N?1仿真逼近拟合的配电网安全边界计算方法。该方法首先计算最大供电能力(total supply capability,TSC),然后从TSC点出发展开,利用N?1安全校验仿真逼近的方法逐点搜索得到安全边界上的一系列临界点,最后通过最小二乘拟合得到安全边界在二维馈线负荷空间上的断面图像。应用上述算法通过大量算例仿真观察归纳安全边界的拓扑性质及几何形状,并阐述其形成原因和应用意义。通过对大量二维断面的分析发现,配电网的N?1安全边界是唯一确定存在的;可由线性、紧致、且不会"打结"的超平面描述;安全边界围成的区域是连通的、内部无空洞的凸集。结论表明,这些拓扑性质有利于发展基于安全域的快速配电网安全性评价方法,使配电网在线安全评价与控制变得简单。To make a research on topological characteristics of N-1 security boundary for smart distribution networks, the approach and fitting algorithm of security boundary based on N-1 simulation is proposed. First, total supply capability （TSC） was calculated. Then, from the TSC point, a series of critical points on the boundaries were searched by N-1 security simulation and approximating approach. Finally, 2-dimension cross section figure was obtained in feeder load space by least squares method. With the algorithm above and according to the simulation and observation from case studies, topological characteristics of security boundary are derived, besides, its formation cause and application significance are elaborated. Based on analysis of massive 2-dimensional sections, it is proved that distribution N-1 security boundary exists deterministically and uniquely, and it can be described precisely as a liner, compact and non-knotting hyperspace. The space surrounded by the boundaries is a connective convex set without empty inside. The conclusions indicate that these characteristics above are suitable for developing fast region-based security evaluation method; and make it easy for online security evaluation and control of distribution networks.

关 键 词：配电网 N-1 安全边界 拓扑性质 仿真拟合 最大供电能力 

分 类 号：TM727[电气工程—电力系统及自动化]