高频交流与直流短路融冰比较研究  

Comparative Study on Melting Ice with High Frequency AC and DC Short Circuit Method

作　　者：钟鈜州 刘明光[1] 张雪亮[1] 

机构地区：[1]北京交通大学电气学院,北京100044

出　　处：《中国电力》2014年第9期94-99,共6页Electric Power

摘　　要：利用输电线流过电流产生的热来融冰是一个比较可行的方法。为此,提出用频率为1 kHz的交流电流进行融冰,即利用输电线流过高频电流时电流的集肤效应,使单位长度输电线的电阻增大,与直流融冰电流相比,在相同的有效电流下,相同时间内交流电流产生近2倍于直流的热量来融冰,能够缩短融冰时间,减少经济损失。设计了一套级联型高频高压大功率装置,并用Matlab对该装置进行仿真分析。结果表明,1 kHz的高频交流电流适用于35 kV及以下的电力系统融冰。It is a feasible method to use the joule heat generated by the current through power lines to melt ice.Therefore,the AC current with a frequency of 1 kHz is suggested to be used for melting ice,which means by using the current-skin-effect produced by the high frequency current through the transmission line,the equivalent resistance in the unit length of transmission line will be increased.Compared with the DC current,in the same electric shed,the AC current will generate two times of joule heat in a short period of time,which will shorten the melting time and reduce the economic loss.Moreover,a serial-connected type of high frequency and high voltage power device is designed and simulated by Matlab.The results show that the alternating current with 1 kHz high-frequency is applicable to melting ice in power systems of 35 kV and below,which can provide a reference for melting ice in low-voltage distribution systems.

关 键 词：输电线路 覆冰 高频电流 融冰 配电系统 变频装置 仿真计算 

分 类 号：TM752[电气工程—电力系统及自动化]