超/特高压输电线路带电直流融冰方法

来源期刊:中南大学学报(自然科学版)2016年第5期

论文作者:罗日成 潘俊文 刘化交 邹德华 俞乾

文章页码:1551 - 1559

关键词:分裂导线;带电;直流融冰;融冰回路

Key words:bundled conductors; energized; DC ice melting; ice-melting circuit

摘    要:为了解决架空线路传统融冰方法需停电作业的问题,对采用分裂导线的超/特高压输电线路提出一种带电直流融冰方法,并进行现场试验验证。以二分裂导线和绝缘间隔棒架设的超高压输电线路为研究对象,利用ATP软件建立融冰电路的仿真模型,分析融冰电源的获取途径、安装位置和功率选取问题,以及融冰段内的直流电流对外部电路的影响。研究结果表明:三相桥式半控(全控)整流和直流发电机是获取融冰电源的有效途径;直流融冰电源装置安装在融冰区段中间位置最理想;融冰段内的直流电流不会流出融冰回路,对融冰区段外部线路电压和电流幅值及波形不产生任何影响,确保融冰线路在带负荷融冰过程中的正常、稳定运行,克服现有融冰方法中不能带电融冰的局限性。

Abstract: In order to solve the problem of traditional deicing technologies requiring power failure when transmission lines are extremely accumulated by ice, an energized direct current (DC) ice-melting solution was proposed for high voltage (EHV) or ultra high voltage (UHV) transmission lines which used bundled conductors, and a field test was conducted. Taking a UHV transmission line with two-bundle conductors and insulating spacer as an example, the simulation model of ice-melting circuit was established by ATP software, and the problems of ice-melting power, installation position, power selection and the effects of DC current in the ice-melting period on the external circuit were analyzed. The results show that the three-phase half controlled bridge rectifier (full control) and DC generators are effective ways to obtain ice-melting power. The most ideal position of installing power supply device is the middle of ice-melting section. DC ice-melting current of melting-circuits will not flow outside, which has no effect on the amplitude and waveform of exterior line voltage and current. The method ensures the normal and stable operation in the ice-melting process with load, and overcomes the limitations existing in ice-melting methods which can not energized ice melting.

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