电力系统实时相角测量高速数据采集卡设计  

High-speed data acquisition card for real-time phasor measuring

作　　者：沙智明[1] 郝育黔[1] 郝玉山[1] 杨以涵[1] 

机构地区：[1]华北电力大学电力工程系,河北保定071003

出　　处：《电力自动化设备》2005年第5期70-73,共4页Electric Power Automation Equipment

摘　　要：为实时相角测量装置开发了基于Compact PCI总线的高速数据采集卡。采用多路模拟量同步采样方式,在采样触发环节引入数字锁相环,使采集卡在电网频率改变时能自适应调节采样频率,实现每周期等相位触发采样,提高了采样精度。采集卡数据传输总线采用Compact PCI总线, 使系统具备了可热插拔、易于扩展和通用性强等特点。在QNX实时操作系统平台上开发了数据采集软件,提高了数据采集系统的实时性。A high-speed data acquisition card based on CompactPCI bus is designed for real-time PMU (Phasor Measurement Unit). The multi-channel synchronous triggering method is adopted,and the digital phase locked loop is introduced to the sample-and-hold trigger progress. The card adapts its sample frequency to grid frequency variation and realizes equal-phase-trigger sampling in every period to enhance the sampling precision. The CompactPCI bus is used in data transmission, which makes the system expandable, universal and hot swappable. The data acquisition software is developed on QNX real-time operating system to improve the real-time performance of system.

关 键 词：相角测量装置 数据采集 COMPACTPCI总线 实时操作系统 QNX 

分 类 号：TM933.311[电气工程—电力电子与电力传动]