电网相量实时同步测量的一种新方法

电网相量的异地实时同步测量，对于电力系统状态估计、稳定控制、故障识别及继电保护等都具有重要意义。文中提出一种基于全球定位系统(GPS)与锁相技术的电网相量实时异地同步测量方法，采用硬件逻辑电路产生既能自适应跟踪电网频率变化、又能实现异地同步的等间隔采样脉冲序列，并由它启动A／D转换器自动完成对输入模拟信号的同步采样，很好地解决了电网相量的异地同步测量问题并保证有较高的测量精度。

A NEW METHOD OF REAL TIME AND SYNCHRONOUS MEASUREMENT ON POWER NETWORK PHASE PARAMETERS

Real-time and synchronous measurement of power network phase parameters at different site is very important to system state estimation, stability control, fault identification and relay protection etc. A new measurement method based on global position system (GPS) and phase locked loop (PLL) technique is discussed. An equal phase interval sampling pulse sequence which formed by the hardware logic circuit is used to self-adaptively follow system frequency variance, and makes the different site synchronous sampling achievable. These sampling pulses start up A/D converter to complete the synchronous sampling of input analog signal automatically. It effectively solves the problem of how to measure different site power system phase parameters with high precision synchronously.