智能变电站同步系统对测量设备的影响及其处理策略

doi:10.11985/2020.03.019

摘要/Abstract

摘要：

智能变电站内测量设备普遍采用组网采样模式,该方式接线简单,能实现全站数据共享。但是组网采样高度依赖于站内时钟同步系统信号,安全可靠性不及点对点采样模式。通过研究基于电气参考矢量的网络采样数据同步技术,分析了组网采样方式下时钟同步系统异常对测量设备的影响。针对不同情况下的影响,提出统一同步调整、丢帧自动补偿、品质辅助决策、异常插值报警等主动与被动处理策略。工程实践证明,这些处理策略可以及时发现并有效减小同步系统异常对测量设备的影响,提高组网采样方式下测量设备各项功能的安全可靠性。

关键词: 组网采样, 时钟同步系统, 统一同步调整, 丢帧自动补偿, 品质辅助决策, 异常插值报警

Abstract:

The network sampling method based on fiber-optic network transmission is widely applied in smart substation which arranges simply, and all data sharing in substation can be realized. However, it requires high accuracy of the station synchronization system signal. Compared to point-to-point sampling method, the reliability of the network sampling method cannot be ensured. By analyzing the network sampling data synchronization technology based on electrical reference vector, the influence of the clock synchronization system abnormity on the sampling, measurement calculation and synchronism function of the measuring device is analyzed. Aiming at the influence of sampling abnormities caused by synchronous system abnormities on the measuring device, the processing strategies of uniform synchronous adjustment, automatic frame loss compensation, quality-aided decision-making and abnormal interpolation alarm are proposed. These schemes are implemented to reduce the impact of synchronization system effects on measuring device effectively, and promote reliability of the network sampling and calculation in many projects and proven to be effective.

Key words: Network sampling, clock synchronization, uniform synchronous adjustment, automatic frame loss compensation, quality-aided decision-making, abnormal interpolation alarm

中图分类号:

TM561

朱何荣,方佳维,陈桂友,王敏,熊慕文. 智能变电站同步系统对测量设备的影响及其处理策略[J]. 电气工程学报, 2020, 15(3): 143-149.

ZHU Herong,FANG Jiawei,CHEN Guiyou,WANG Min,XIONG Muwen. Influence of Synchronous System on Measuring Device in Smart Substation and Its Processing Strategy[J]. Journal of Electrical Engineering, 2020, 15(3): 143-149.

图/表 8

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