智能发电设备电参量测量仪的研制

Design of an electric parameter measurement instrument for power generation equipment

发电设备电参量是反应发电设备状况的重要参数,为此研制了基于嵌入式系统的智能发电设备电参量测量仪。通过加Hanning窗的基2 FFT电参量计算方法、硬件频率检测跟踪方法降低泄漏效应和栅栏效应;同时设计了外部总线接口的高速同步AD转换、多路反馈(MFB)型滤波器,多任务调度,以及图形开发软件μC/GUI的应用,提高了电参量测量的实时性、抗干扰能力和人机交互能力。实验测试表明,该系统精度不大于0.5%,稳定性好,使用操作方便。

Because electric parameters are crucial for indicating the operating condition of power generation equipment, an intelligent instrument for electric parameters measurement of power generation equipment was developed. A Harming windowing interpolation algorithm based on FFT and a hardware frequency track were adopted to reduce the effect of leakage and fencing. In addition, a high speed AD conversion based on an external bus interface, a multiple feedback filter, an application of μC/GUI, and a multitask scheduler all were designed to improve timing and anti-jamming. Test results indicate the system is stable and easily operated. The measured relative error of electric parameter is less than 0.5%.