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在电力参数的采集中,信号必须经过高性能信号调理电路才能达到较好的测量精度,而合理的数据采集前端处理结构能简化电路,保证系统可靠运行。以电力信号采集系统中信号调理部分为研究对象,设计了一种适合电力系统特点的信号调理模块。通过仿真及实测显示,该信号调理模块高速AD器件和DSP(数字信号处理)保证了采集的精度、速度以及同步性,低通滤波和锁相倍频电路有效防止了高频干扰和频谱泄漏,可应用于各种电力系统监控装置。
In the acquisition of power parameters, the signal must go through high performance signal conditioning circuit to achieve better measurement accuracy, and reasonable data acquisition front-end processing structure can simplify the circuit to ensure reliable operation of the system. Taking the signal conditioning part of the power signal acquisition system as the research object, a signal conditioning module suitable for the power system is designed. The simulation results show that the signal conditioning module high-speed AD devices and DSP (digital signal processing) to ensure the accuracy, speed and synchronization of acquisition, low-pass filter and PLL circuit effectively prevent high-frequency interference and spectral leakage, Can be applied to a variety of power system monitoring devices.