摘要
电力系统中CT异常的情形时有发生,给微机变压器差动的安全运行带来了严重的问题。描述了CT异常物理过程的实际情形,分析了现有的各种异常判据,针对这些判据的缺陷,提出了一种新的CT异常判据,并对CT异常对差动保护动作行为的影响进行了阐述,较好地解决了实际运行中CT异常引起的差动误动的问题。
The CT abnormal condition, which happens frequently in power system, brings up serious problems to transformer differential protection. CT in abnormal physical procedure is described in this paper, and variable abnormal criterias are analyzed as well. However, the criteria have some defects. A new kind of criterion for CT abnormal condition is proposed. It also analyzes the action influence on deferential protection under CT abnormal conditions, which effectively solve the problem of differential malfunction when CT abnormal condition happens.
出处
《继电器》
CSCD
北大核心
2006年第17期69-72,共4页
Relay
关键词
CT异常
变压器差动保护
微机变压器保护
CT abnormal
transformer differential protection
microprocessor-based transformer protection
