高压电网死区保护研究综述

电力系统内部存在着各种形式的死区故障，准确、快速地切除死区故障直接关系到电力系统的安全稳定运行。详细介绍了主要几种常见的死区故障及其产生的原因，分析了典型死区保护逻辑的不足:即保护动作时间长且扩大了事故范围。综述了各类死区故障研究的现状，并对各种切除死区故障保护方案的优缺点作出评述。最后在现有研究的基础上，提出了死区保护研究的几点建议与设想，为后续开展研究提供借鉴与参考。

A survey of relay protection for high voltage dead-zone fault

There are various forms of dead-zone fault in power system, and how to remove the dead-zone fault quickly and correctly is related to the safe and stable operation of power system. This paper introduces several common dead-zone faults and causes of dead-zone faults. Then the deficiencies of typical dead-zone protection logic are analyzed thoroughly, including the operation time of relay protection and the scope of fault. It summarizes a variety of dead-zone researches status, and evaluates the advantages and disadvantages of various of relay protection schemes of dead-zone faults. Finally, based on the existing researches, some assumptions and suggestions are put forward for further research.