一种正特性自适应可调电阻的实现  

Realization of positive characteristic self-regulated current restraint resistance

作　　者：张源森 张恩平[2] 刘志勇 王泽众[3] 张东峰 刘建 吕奋飞 

机构地区：[1]德州供电公司,山东德州253000 [2]济南大学自动化与电气工程学院,山东济南250022 [3]华北电力大学电气与电子工程学院,北京102206

出　　处：《电工电能新技术》2014年第6期52-57,共6页Advanced Technology of Electrical Engineering and Energy

基　　金：山东省自然科学基金资助项目(ZR2012EEL19);山东省电力集团公司科技资助项目

摘　　要：现场试运行证明直流注入式选线定位原理是一种非常有效的小电流接地系统单相接地故障选线定位方法,直流发生器是实现该选线定位原理的重要组成部分,由整流元件和限流电阻串联组成。本文提出一种基于PTC的正特性自适应调整限流电阻的实现方法,以PTC元件并联常值电阻组成正特性自调整电阻网络元,若干网络元串联构成正特性自适应可调限流电阻,实现了随中性点对地电压的变化,自适应调节注入直流电流大小的功能。论文对该实现方法及其实现原理进行了详细的理论分析,仿真和实验验证了该方法的有效性。Field test running has proved that injected direct current line selection and location method is very effective in the single-phase grounded fault line selection and location of the small current grounded system,and the direct current generator takes a very important role in the realization of this fault line selection and location method. The direct current generator is made up of rectifier part and current restraint resistance. A realization of current restraint resistance based on PTC positive characteristic of self-regulation is proposed in this paper,in which a positive character self-regulated resistance network element based on PTC element and paralleled constant value resistance constitute a network element,and several serial connected network elements constitute the positive characteris-tic self-regulated current restraint resistance which can successfully regulate the direct current value self-adaptively according to the change of value of neutral to ground voltage. This paper has made a detailed theoretical analysis towards this method and its principle of implementation,and the simulation and experiment in the lab has proved this method is effective.

关 键 词：单相接地故障 直流注入选线定位原理 直流发生器 自适应调整限流电阻 PTC 

分 类 号：TM13[电气工程—电工理论与新技术]