摘要
为了探讨OPGW在进站门型架引下线部分经常发生纤芯中断事故的内在原因,通过对典型案例的现场勘察和模拟间隙放电进行仿真试验,并应用过电压理论分析论证,得出当OPGW与门型架金属构件间隙足够少时,在雷电或电力系统过电压的作用下,将可能导致OPGW与门架金属构件之间放电,从而击穿熔断纤芯,造成通信中断事故。提出了OPGW在进站门型架的上、下端加装接地线,中间部分与金属构件进行有效绝缘,以确保电力系统通信安全畅通的防范措施。
Due to the lag of the install standard for OPGW leading to the tower, the small interval between the OPGW and metal construction may become the hidden troubles under construction, which will produce spark discharge when the power grid encounters power frequency to ground short circuit and lightening current. The spark discharge will cause disruptive fusing of the core of OPGW, which affects seriously the reliable transmission of real time information. The thesis discusses the preventive measures based on analysis, and suggests that the grounding should be done at the top and bottom of OPGW leading down the tower and the insulators should be installed between OPGW cable and metal component.
出处
《电力系统通信》
2010年第1期29-32,共4页
Telecommunications for Electric Power System
关键词
OPGW
工频
短路
雷电流
熔断
防范措施
OPGW
power frequency
short circuit
lightening current
fusing
preventive
