摘要
继电保护装置应不依赖对时系统进行数据同步采样和跳闸,网络采样和跳闸因为网络延时不确定而不能应用于智能变电站工程,鉴于电力专用交换机能精确控制和计算驻留延时,故其可作为解决此难题的技术方向。在电力专用交换机应用中,通过智能变电站合并单元(MU)固有延时和链路驻留总延时还原间隔采样数据的发生时刻,实现多间隔采样同步,当驻留延时超过5 ms时,继电保护装置会进行相关的闭锁和报警。基于组网测试系统,对延时补偿、数据流量精确控制、保护装置采样同步处理等功能、性能和可靠性进行了分析,提出了组网方案和关键技术要求。
The synchronous data sampling and triping of the relay protection device must be independent on time synchronization system. The network sampling and the triping can not be used in intelligent substation due to random fluctuation of the network delay. The electric power private exchanger can control and calculate the delay time exactly,so it gives a technical direction to solve above difficulty. In appliation of the electric power private exchanger,according to the inherent delay of the intelligent substation merging unit( MU) and the total delay of the link circuit,the time of ocurrence of interval sampling data was restore,and the synchronization of multi-interval sampling was realized.When the time delay is longer than 5ms,the relay protection device will be locked out and an alarm will be given. Based on the network testing system,the functions,the performance and the reliability of the delay compensation,the data flow precise control and the sampling synchronous processing of protection devices were analyzed. The networking scheme and the key technical requirements were put forward.
出处
《华电技术》
CAS
2015年第6期13-17,77,共5页
HUADIAN TECHNOLOGY
关键词
智能变电站
网络延时
延时补偿
交换机
intelligent substation
network delay
compensation of time delay
exchanger
