摘要
针对现代机场直线加电系统中存在的电缆压降问题,提出了一种解决方案,即通过在变换器后加装动态电压恢复器来补偿电缆的压降。动态电压恢复器采用单向馈能电路结构,可以在能量单向流动的情况下,实现对因电缆压降而产生的电压暂降或暂升的持续补偿。基于该动态电压恢复器结构,分析了负载电压有效值反馈控制方法。理论分析和试验结果表明,动态电压恢复器可有效补偿电缆压降,并能保证负载电压的稳定。
A new solution is proposed to solve the problem of voltage drops of power cable,which exists in the beeline power supply system of present airdrome.This solution adopts a dynamic voltage restorer installed between the converter and the loads to compensate the voltage drop of power cable.The dynamic voltage restorer is designed as unilateral energy flow equipment which can compensate continuous voltage sag or swell resulted from the voltage drop of power cable.Based on power circuit of the dynamic voltage restorer, RMS feedback control strategy of load voltage is analyzed.The experimental results show that the dynamic voltage restorer can compensate voltage drop of power cable,confirm the voltage stability of the sensitive load.
出处
《电力电子技术》
CSCD
北大核心
2008年第9期6-8,共3页
Power Electronics
关键词
变换器
补偿
电缆/动态电压恢复器
单向馈能
eonverter
compesation
power cable/dynamic voltage restorer
unilateral energy flow
