基于CPCI总线的电力系统实时相角测量高速数据采集系统

High Speed Data Acquisition System Base on CompactPCI Bus for Power System Real-time Phasor Measurement

电力系统实时相角测量技术为电力系统动态监控提供了重要手段。数据采集是实时相角测量系统中的重要环节。本文介绍了一种高速数据采集系统,它基于高速、高性能、可热插拔的CPCI总线,采用了多路同步采样方式,在采样触发环节引入了数字锁相环,数据采集软件基于QNX实时操作系统。整个系统具有很高的实时性,在电网频率改变时能自适应调节采样频率,提高了采样精度,具有一定的可扩展性、可移植和通用性。

Power system real time phasor measurement unit requires high speed data acquisition. The author designs a high data acquisition system based on the CompactPCI bus, which is a high performance, high availability and hot swap capable computer bus. The system introduces the Phase Locked Loop in its sample and hold trigger progress, thus the system can adjust its sample frequency adaptively when the power frequency vary. The voltage amplitude and phase calculation software is running on the QNX real time operating system and the whole data acquisition system is expandable, portable and versatile.