电网技术2001，Vol.25Issue(3)：76-78,3.
音频接口与继电保护配合的探讨
COORDINATION OF AUDIO-FREQUENCY INTERFACES AND PROTECTIVE RELAYING
摘要
Abstract
At present, longitudinal differential protection is widely used in UHV transmission lines. To ensure the correct action of longitudinal differential protection, the audio-frequency interface plays such a role as the band linking the multiplexing channels and longitudinal differential protection, therefore, to improve the reliability of protective relaying the coordination of audio-frequency interface and longitudinal differential protection is analyzed in this paper. According to the on-site experience of protective relaying operation, some problems in the configuration of longitudinal differential protection and that in the coordination of audio-frequency interface and the protection are discussed.They are: the connection of protection fault detector which starts audio-frequency interface and cuts off telephone communication; the condition by which the audio-frequency interface shifts the frequency of its signal to tripping frequency; tripping of weak-or zero-in-feed lines without time-delay; and the special problem in the connection of audio-frequency interface with the protection system.The solutions are put forward accordingly.关键词
音频接口/纵联保护/超高压输电线路分类
信息技术与安全科学引用本文复制引用
郭铁军,殷军..音频接口与继电保护配合的探讨[J].电网技术,2001,25(3):76-78,3.
