摘要
结合高低压电器试验和研究中对选相合闸装置的实际需求,研究了跟踪输入电压信号频率的选相合闸自适应控制技术,即通过快速傅里叶算法得到输入电压的频率和初相位,并根据待合闸相位输出控制信号。系统设计了以ARM微处理器为控制核心的硬件电路,主要包括ARM中央控制单元、信号调理电路、隔离与电力开关模块、触摸屏等部分。分析了选相合闸装置在检测和数据处理方面产生误差的原因,并给出了解决办法。试验结果表明:选相合闸控制装置工作可靠,实际选相误差小于±1°,有一定的应用参考价值。
The technology of phase angle selection of automatic tracking voltage frequency in the electrical apparatus measuring device is studied in this paper combining with the need for that in high and low voltage electrical test and research, which will obtain the voltage frequency and the initial phase by Fast Fourier Transform （FFT） Algorithm as well as the output control signal by the current phase. A hardware circuit system with ARM microprocessor as the con- trol core is designed, including ARM central control unit, signal processing circuit, modules of isolation and power switch, and touch screen. The reasons of phase angle selection device for errors generated in measuring and data pro- cessing are analyzed, and the methods on how to improve the measurement accuracy are also discussed in this pa- per. Testing results show that the system of electrical apparatus measuring device for phase angle selection is reliability and the error is less than ±1°. This method of automatic tracking voltage frequency is of certain value for reference to rapid calculation of phase angle selection.
出处
《电测与仪表》
北大核心
2014年第10期82-87,共6页
Electrical Measurement & Instrumentation
关键词
相位选择
自适应
快速傅里叶变换
信号调理电路
phase angle selection, self - adaptation control technology, fast Fourier transform algorithm, signal ampli-fying circuit
