基于GPS同步技术的电力动态监测系统的设计

设计了一种基于全球定位系统(GPS)的同步相量测量装置,用于广域测量系统(WAMS),实现对电力系统关键相量的实时监控。采用基于GPS同步时钟和数字信号处理器(DSP)实现的PMU利用DSP的输入捕获功能,在进行捕获GPS的PPS信号的方法的同时,也对捕获采样信号的频率进行跟踪。采用过零点采样与傅里叶算法相结合,进行信号采样和数据的处理,避免了因频率变化而引起数据误差,提高了PMU的采集精度及抗干扰性。

Design of Power Dynamic Monitoring System Based on GPS Synchronism Technology

A synchrophasor measurement device based on the global positioning system （GPS）was designed for wide area measure system（WAMS） realizing the real-time monitoring of key phasor in the power system. Using a GPS based synchronous clock and the digital signal processor （DSP） , a synchronized phasor measurement unit （PMU） was realized. Using the input-capture function of the DSP, PMU Captured PPS synchronization signal of the GPS, and capturd the frequency of sampling signal for the frequency tracking, Combined the zero-crossing sampling and FFT algorithm in the signal sampling and processing of data, data error caused by the frequency change is avoided, the acquisition precision ability and anti interference ability of the PMU are also enhanced.