智能配电自动化远方终端数据采集系统设计

Design of the Remote Terminal Data Acquisition System for the Intelligent Distribution Automation

配电自动化远方终端设备数据采集系统在配电网监控方面起到决定性作用。针对传统数据采集系统设计复杂度高、精度低等不足,采用在ARM控制器外扩16位高精度A/D采样芯片,配合测频电路设计出实时调节采样频率的新型数据采集系统架构。对数据进行软件滤波,并采用快速傅里叶变换提高实时性。采用信号发生器和高精度开关电源作为信号输入,分别进行了频率测试、电压精度测试和快速傅立叶变换实验。实验结果表明,简化后的终端数据采集系统具有较高精度和稳定性。

Distribution automation remote terminal equipment data acquisition system plays an important role in the distribution network monitoring. Aiming at the traditional high complexity and low precision data acquisition system,a new data acquisition system was designed with ARM controller in expanding 16 bit high precision A/D sampling chip and frequency measurement circuit,equipped with a real-time frequency measuring circuit. The data was filtered by the software and fast Fourier transform was used to improve the real-time performance. The signal generator and high precision switching power supply were used as the signal input. The frequency test,voltage accuracy test and fast Fourier transform experiment were carried out. The experimental results show that the simplified terminal data acquisition system has higher accuracy and stability.