电力系统保护与控制2016，Vol.44Issue(7)：76-82,7.DOI:10.7667/PSPC150920
故障行波特性对光纤差动保护时延的影响分析
Influence on the optical fiber differential protection delay based on characteristic of fault traveling wave
摘要
Abstract
The differential protection of power system puts forward higher requirements on the real-time data transmission for double terminals' information. Larger transmission delay is likely to influence the synchronization precision and cause the refusing act and incorrect operation of relay protection. So the channel delay problem must be given full consideration to protect in practical application. But the delay effect caused by electrical measurement cannot be ignored in UHV long-distance transmission system, the traditional method of delay analysis without considering the effect of electric parameters as traveling wave. This paper considers the process from the failure happening to the protection completing fault diagnosis, and the delay of electric parameters traveling wave and the optical signals in each link. Different fault location and communication equipment lead to uncertainty of channel delay, then through three kinds of random distribution of delay model are used to reflect the differences in total delay and the results are compared and analyzed. The result shows that normal distribution is more suitable for delay distribution, research conclusion can be applied in optimal selection of protective devices and data synchronization on both sides. Finally, the relationship between the delay of communication and the network nodes is analyzed by using the normal distribution.关键词
光纤通信/差动保护/时延/行波/随机分布Key words
optical fiber communications/differential protection/delay/traveling wave/random distribution引用本文复制引用
黄景光,梅李鹏,林湘宁,翁汉琍..故障行波特性对光纤差动保护时延的影响分析[J].电力系统保护与控制,2016,44(7):76-82,7.基金项目
国家自然科学基金项目(51477090) （51477090）
