导线监测装置取电研究

Study on Power Supply System in High-voltage Transmission Lines

对输电线路进行在线监测时,其电源的供给是关键问题之一。在此提出了一种利用特制的铁心感应取能给高压侧电路供电的装置,其前端保护装置中包括输出功率控制电路,可将取电线圈的输出功率限定在一个较小的范围;后端包含可充电的锂电池组,通过合理的相角控制策略,在输电线路的电流在0.04～1.5 kA范围内可实现稳定的功率输出,并在电流较大时铁心发热现象不严重。实验证明了该方法的可靠性及有效性。

In online monitoring of the transmission line, its power supply is one of the key issues.This paper presents a device using special transformer which can induce power to supply the high side circuitry.The front-end of the protection device includes output-power-control circuitry,which can take output-power limited to a small range.At the back side it contains rechargeable lithium batteries.By using the reasonable control strategy,it can provide a stable output-power at the transmission line current ranging from 0.04-1.5 kA.And in the larger current the fever of transformer is not serious.Experiments show that the power supply system has the high reliability and efficiency.