低压微网故障区域定位算法  

A Novel Algorithm for Fault Location for Low-Voltage Microgrids

作　　者：赵凤贤[1] 孙丽颖[1] 

机构地区：[1]辽宁工业大学电气工程学院,辽宁锦州121001

出　　处：《电力科学与工程》2013年第9期24-28,共5页Electric Power Science and Engineering

基　　金：国家自然基金青年基金资助项目(61104070)

摘　　要：大量分布式电源的引入导致传统配电网故障区域定位算法在低压微网中不再适用。根据微网双向潮流结构和运行特点将其划分若干区域,将分割区域作为节点,断路器作为边,利用图论算法建立了微网的数学描述模型。在此模型基础上,通过检测故障前后功率的变化量与割集方向得到微网的故障信息矩阵,进而提出了一种微网故障区域定位的矩阵算法。算例分析证明,该算法能够有效地识别出故障发生的区域,适用于微网并网或独立运行两种模式。Owing to the distribution system with the distributed generations, traditional fault location algorithm is no longer applicable in low-voltage microgrids. According to the hi-directional power flow structure and operational characteristics of microgrids, dividing microgrids into several subareas, the paper proposes that the segmentation of region should be viewed as a node and the circuit breaker should be viewed as edge, thus a describing model of microgrids is constructed based on graph theory. Combined with faults information model, through compareing the detection integrated power variation before and after the fault with cutting set direction. A new matrix algorithm for fault region location in mierogrids is built to be based on the model. Examples prove that the fault region can be identified immediately and correctly, the algorithm is suitable for the grid-connected operation mode or the isolated operation mode.

关 键 词：微网 分割区域 图论 故障信息模型 变化量 

分 类 号：TM711[电气工程—电力系统及自动化] TM732