复杂配电系统电压跌落状态估计可观性分析  

The voltage sags state estimation observability analysis in complicated distribution systems

作　　者：牟旭涛[1] 王宾[2] 潘贞存[3] 

机构地区：[1]山东电力研究院,山东济南250061 [2]清华大学电机系电力系统及发电设备控制和仿真国家重点实验室,北京100084 [3]山东大学电气工程学院,山东济南250014

出　　处：《电力系统保护与控制》2009年第3期32-35,40,共5页Power System Protection and Control

摘　　要：电压跌落状态估计算法(SSE算法)是一种基于单电源辐射状网络结构的二阶曲线拟合算法。但是目前众多分布式发电接入及小电厂并网发电使得配电网络结构呈现复杂化、多电源化,传统电压跌落状态估计算法无法直接使用。针对该问题,提出了电压跌落状态估计可观性的概念,并且从故障电流叠加的角度出发,构造了电压跌落状态估计可观性的数学模型,合理地解决了部分故障路段不可观的问题,使得SSE算法可以应用到多电源复杂配电系统中。The voltage Sag State Estimation （SSE） algorithm is a 2^nd order curve fitting algorithm using the characteristics of single power source and radial feeders in distribution systems. The topologies of distribution systems are becoming complicated from traditional radial mode since more and more distributed generators merging into the grid. Hence the proposed voltage sags state estimation algorithm can not directly adopted. In response to this question, the SSE observability is defined and modeled in the paper, and correlative modification method is also proposed from the point of fault current superimposing.

关 键 词：多电源 配电系统 状态估计 可观性 

分 类 号：TM714.2[电气工程—电力系统及自动化]