基于优化小波重构算法的直流输电线路故障测距方法

DC line fault location method based on optimized wavelet reconstruction algorithm

针对柔性直流线路的特点,提出了基于行波测距技术的直流故障位置测距方法和基于小波重构算法的行波波头识别方法。经过算例验证表明,利用文章所提出的方法,可在直流线路发生故障时,快速、有效地检测故障位置,具有较高的识别精准度。该方法可应用于直流线路及直流电网的在线故障检测,对提高可再生能源的送出效率、提高输电的可靠性均具有广泛的应用价值。

According to the characteristics of flexible DC transmission lines,a DC fault location method based on traveling wave fault location technology and a traveling wave head identification method based on wavelet reconstruction algorithm are proposed.The example shows that the method proposed in this paper can detect the fault location quickly and effectively in case of DC line fault,and has high recognition accuracy.This method can be applied to the on-line fault detection of DC lines and DC power grid,and has a wide application value to improve the transmission efficiency of renewable energy and improve the reliability of transmission.