基于广域行波信息的行波保护  

Traveling Wave Protection Based on Wide Area Travelling Wave Information

作　　者：李泽文[1] 花欢欢[1] 邓丰[1] 曾祥君[1] 邹亮[1] 

机构地区：[1]智能电网运行与控制湖南省重点实验室(长沙理工大学),湖南省长沙市410114

出　　处：《中国电机工程学报》2014年第34期6238-6245,共8页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51377012;51207013);湖南省科技重大专项(2012FJ1003);湖南省自然科学基金项目(12JJ3046);湖南省高校产业化培育项目(13CY008);可再生能源电力技术湖南省重点实验室开放基金项目(2012ZNDL001)资助~~

摘　　要：广域行波保护可以解决现有行波保护存在的判据信息来源单一和可靠性低等难题,但存在配置节点多、经济性差等问题。为此,论文提出了一种基于广域初始行波极性与时间信息的新型行波保护方法,该方法利用广域行波信息实现区域电网中的所有线路保护。电网故障时,利用故障初始行波极性信息界定行波故障域,然后融合故障域中的初始行波时间信息判定故障线路;电网拓扑结构发生变化时,仅需在原保护域的基础上进行局部修改,便可提高广域行波保护的自适应能力。仿真结果表明,该广域行波保护方法简便易行,可在配置有限数量行波检测单元的情况下,准确判别故障支路,有助于促进行波保护的工程应用。Wide area traveling wave protection can solve some problems of the existing traveling wave protection, such as single data source and low reliability, while protections must be equipped in many locations and this is not economic. To solve these problems, a novel wide area traveling wave protection was proposed in this paper. When a fault occurs, the fault region can be identified accurately just by analyzing polarity characteristics of every protection region; then the fault line can be determined by the integration of all the recorded arriving time information in the fault region. When the topology of the power network changes, only is local modification needed to improve the adaptability of the wide area travelling wave protection. Simulated results showed that the proposed protection is simple and can be easily realized. With a limited number of travelling wave detection units, it can accurately determine the fault line, and this can help to improve the engineering application of traveling wave protections.

关 键 词：行波保护 广域行波信息 行波保护域 故障线路判定 

分 类 号：TM77[电气工程—电力系统及自动化]