摘要
为了达到遥测0.5级精度,测控装置的交流采样必须设计有效的频率跟踪方法,使系统频率变化时采样频率能实时同步,也就是根据采样时的系统频率来确定采样间隔。文中分析了不进行频率跟踪时频率变化对遥测的影响,提出了一种易于实现的软件频率跟踪方法,并介绍了此方法应用于实际测控装置时的频率收敛时间和遥测精度。
To achieve precision of 0.5 degree in remote measurement, effective frequency tracking method must be adopted in design of alternating current sampling for measurement and control equipment. When system frequency changes, sampling frequency must be changed synchronously, so that the sampling distance can be consistent with real time system frequency. Frequency tracking methods in common use at present are summarized in this paper and the effect of frequency changes on remote measurement without frequency tracking is analyzed. An easy method for software frequency tracking is proposed. Time of frequency constringency and precision of remote measurement for this method when applied to practical equipment are analyzed.
出处
《电力系统自动化》
EI
CSCD
北大核心
2005年第21期92-94,共3页
Automation of Electric Power Systems
关键词
变电站自动化
频率测量
频率跟踪
substation automation
frequency measurement
frequency tracking
