110kV电力系统变压器中性点保护用触发控制间隙  

Triggering Controlled Discharge Gap Used for Protection of Neutral Point of Power Transformer in 110kV Power System

作　　者：王杰[1] 肖清明[1] 陈小龙[1] 王洪斌[1] 吴志勇[1] 许鸣昌[1] 聂洪岩[2] 张环宇[2] 魏新劳[2] 

机构地区：[1]宁夏电力公司,宁夏银川750001 [2]哈尔滨理工大学电气与电子工程学院,黑龙江哈尔滨150080

出　　处：《哈尔滨理工大学学报》2013年第2期57-62,共6页Journal of Harbin University of Science and Technology

摘　　要：针对110 kV电力系统中变压器中性点过电压保护间隙存在的"拒动"和"误动"问题,提出了一种利用被保护点过电压进行触发控制的球-球电极保护间隙.对新型保护间隙的基本工作原理进行了详细阐述,通过实验研究了新型保护间隙保护功能实现的可行性,并对新型保护间隙主要部分的选择与设计进行了说明.通过新型保护间隙样机的相应试验对其保护作用的实际效果进行了验证.结果表明:新型保护间隙不仅可以与现有的中性点保护避雷器进行理想的配合,实现对变压器中性点的完备保护,新型保护间隙的无源性为其在电力系统的推广应用提供方便.Being directed against the problem of ＇ refuse operation＇ and ＇ unwanted operation＇ in the currently used overvoltage protection scheme for neutral point of power transformers in 110 kV power system, the paper put forward a new kind of protective gap which has a pair of ball-shaped gered and controlled by the overvoltage at the protected point, and electrodes and the breakdown of the gap is trig- can be used to realize an ideal cooperation with arrester. The basic work principle of the new type of protective gap has been elaborated in detail. Some tests are performed to study the feasibility of realizing function of the new type of protective gap. The method of selection and design for the major part of new type of protective gap is explained. The actual protective effect of the new protective gap has been verified finally through some corresponding experiments performed on the prototype of the new protective gap. Research result shows： The new protective gap may not only be used, with existing arrester using for neutral point protective of power transformer, to carry out an ideal protection for the neutral point of power transformers, but also the passive characteristic of the new protective gap offers a convenience for its application in power system.

关 键 词：变压器中性点保护 保护间隙 触发控制放电 

分 类 号：TM862[电气工程—高电压与绝缘技术]