智能变电站中智能组件的时间测试方法

IEEE1588作为一种高精度的分布式网络时间同步技术，对智能变电站的建设非常重要。首先介绍IEEE1588时间同步原理，给出其同步过程和2种链路延时测量机制的同步补偿算法；接着提出智能组件在同步时其时间相关可测试内容，包括智能组件作为主时钟或从时钟时的精密时间协议时间同步精度，采样值报文采样均匀度及其输出时间，面向通...

An Approach of Time Measurement for Intelligent Components in Smart Substations

As a high-precision time synchronization technology for distributed network,IEEE 1588 is very important for the construction of smart substations.Firstly,the principle of time synchronization of IEEE 1588,which gives the time synchronization process and the synchronization compensation algorithms of two link delay measurement mechanisms,is presented;then the time-related measurable contents during the synchronization of intelligent components,including the time synchronization accuracy of precision time protocol(PTP) utilizing intelligent components as master clock or slave clock,the sampling uniformity and output time of sampled value(SV) message and the response time and output time of generic object oriented substation event(GOOSE) message,are proposed;finally,the time-related parameters for the main transformer protection and monitoring intelligence component of UDT-531 are tested and analyzed.The results show that the measured time parameters of UDT-531 could basically meet the needs of IEC 61850 standard,thus the feasibility of the proposed time measurement approach is verified.