摘要
行波传输特性是行波定位研究与应用领域里的一个重点内容。以一条110 kV非对称排列输电线路为研究对象,首先推导了线路行波传输参数与解耦方法,对线路上分布式行波监测系统的实测数据进行解耦计算,并对其传输特性进行分析。将常规解耦平衡线路算法用于较短距离110 kV非对称线路解耦计算,此时耦合分量占比低于2%,随着传输距离的增大,线模与零模分量均出现衰减。定量分析不同观测点线模行波与零模行波各频率分量的衰减情况,并比较理论与实测行波衰减情况。最后对线模波速和零模波速进行标定。结果表明:高频衰减对波速标定影响不大,线模与零模均可用于短距离线路分布式故障检测,实现较高的定位精度。
Traveling wave transmission characteristic is a key point in the research and application of traveling wave positioning.Firstly,taking an existing asymmetrically arranged 110 kV transmission line as the research object,transmission parameters and decoupling method for line traveling wave were deduced.Measured data of the distributed traveling wave monitoring system on the line were decoupled and calculated,and its transmission characteristics were analyzed.The results showed that the conventional decoupled balance line algorithm could be applied to the decoupling calculation of the 110 kV asymmetric line with short distance.In this case,the proportion of the coupling component was lower than 2%.With the increase of the transmission distance,both of the line mode component and the zero mode component attenuated.Attenuation of each frequency component of the line mode traveling wave and zero mode traveling wave at different observation points were quantitatively analyzed,and theoretical and measured traveling wave attenuations were compared.Finally,the line mode and zero mode wave velocities were calibrated.The results showed that the high-frequency attenuation had little effect on the calibration of wave velocity,and that line mode and zero mode could both be used for distributed fault detection of short-distance transmission lines to achieve high positioning accuracy.
作者
庞松岭
赵海龙
Pang Songling;Zhao Hailong(Hainan Grid Co.,Ltd.Electric Power Research Institute,Haikou Hainan 570100,China)
出处
《电气自动化》
2019年第6期40-44,共5页
Electrical Automation
基金
海南电网有限责任公司重点项目(073000KK52170002)
关键词
行波传输
线模分量
零模分量
解耦
traveling wave transmission
line mode component
zero mode component
decoupling
