基于同步相量测量技术的功角监测系统

PMU BASED REAL-TIME MONITORING SYSTEM FOR POWER ANGLE

同步发电机并网运行后 ,其功角是用来观察和判断该机组和系统并列运行稳定性的一个很重要的状态变量 ,而实现全网功角实时监测具有更为重要的意义。本文提出了一种新的 PMU构成方案 ,并利用它构建功角实时监测系统。利用同步相量测量技术 ,获得以 GPS时间为基准的功角信息 ,由各监测点的相对功角变化来预测系统稳定性。并给出了一种新的发电机功角计算方法。本方案实时性强 ,同步性好 。

Power angle is one of the important state variable which to be used to observe and judge stability of generator running with system side by side after synchronous generator join in system,but it is more important to realize real-time global monitoring and control of power angles.This paper gives a new scheme of the phasor measurement unit(PMU),and propose the real-time monitoring for power angles of system.Power angles information can be obtained by syschronized phasor measurement technique based on GPS.The stability of powe system can be predicted by relative power angle of each substation.In addition,this paper gives a new method to calculate the power angle of generator.This scheme has real-time and synchronous capability admirably.It is easy to construct the real-time monitoring system for power angles through the scheme in this paper.