电力系统保护与控制2017，Vol.45Issue(8)：16-22,7.DOI:10.7667/PSPC160603
不同步双端数据修正波速的单端行波测距算法研究
Single-terminal traveling wave location algorithm based on amending wave velocity
摘要
Abstract
In order to solve those problems, for example high precision synchronization requirements, heavy traffic, and uncertainty of wave velocity, and at the same time improve the tolerance rate and reliability of the location system, this paper presents a new method for single-terminal traveling wave location with amended wave velocity by two-terminal asynchronous data. By analyzing the changes of polarity of the wave after catadioptric and introducing zero-modulus and line modulus wave velocity contrast as auxiliary criterion, it counts the time-lag between initial wave and reflected wave from remote bus under receiving disturbance, then amends the value of wave velocity through this time-lag of two terminals, finally uses the amended velocity and time-lag of single terminal to locate the fault accurately. This algorithm integrates the advatages of single-terminal data easy to time synchronization and two-terminal data amending the wave velocity, reduces high precision time synchronization required by the two-terminal traveling wave fault location; and at the same time two terminals only exchange time-lag of single terminal, which will reduce the communication dependency. PSCAD/EMTDC simulation show that this method has high precision for fault location, and also decreases the negative influence made by wave velocity and time synchronization.关键词
行波故障定位/极性/波头标定/波速修正/模量Key words
traveling wave fault location/polarity/wave-front calibration/velocity amend/modulus引用本文复制引用
李振兴,吴李群,田斌,李振华..不同步双端数据修正波速的单端行波测距算法研究[J].电力系统保护与控制,2017,45(8):16-22,7.基金项目
This work is supported by National Natural Science Foundation of China (No. 51507091).国家自然科学基金项目(51507091) （No. 51507091）
