摘要
对发电机和电力系统的频率进行精确测量是保证自动准同期装置正确动作的重要条件之一。本文提出了一种基于单片机和CPLD的同步发电机自动准同期装置中的频率测量方法,介绍了频率测量的基本原理,在该原理的基础上采用单片机和CPLD综合技术实现了频率测量,CPLD进行频率检测,单片机进行数据处理与智能控制,并给出了测频电路的硬件电路图和软件流程图。实验表明,单片机与CPLD结合进行测频,测量误差小于10-3,使测量精度得到了提高,而且测量装置的集成度也较高,具有一定的实用价值。
The exact frequency measuring for the generator and the power system is one of most important step to ensure the automatic quasi-synchronizing device operates accurately. A new method of frequency measuring applied in the generator automatic quasi-synchronizing device is put forward in this paper. The basic principle of the frequency measuring is introduced. The frequency measure is done by adopting singlechip and CPLD. CPLD detects the frequency and the singlechip process the data and implements intelligent control, the hardware circuit diagram and the software flow chart are given in the paper. The experiments indicate that the measure precision and system integration are improved by combining singlechip and CPLD in frequency measuring. The measuring error is less than 10-3 and the device has practical applying value.
出处
《电子测量技术》
2007年第12期122-125,共4页
Electronic Measurement Technology
基金
甘肃省中青年基金(ZS032-B25-02)资助项目
