Extended staggered undersampling synchrophasor estimation technique for wide-area measurement systems

摘要

This paper presents the application of an extended staggered undersampling technique for synchrophasor detection for wide-area measurement systems (WAMSs). The proposed technique is based on a direct transfer of waveform samples over the communication link. The synchrophasor detection task is performed in a control/data center. The phase-angle information is preserved within the transferred samples given that the communication network time reference is used to time-tag the samples. This technique could assist the adoption of communication technologies, such as broadband services, to monitor events across the distribution network synchronously. It is proven that the proposed method can bypass the errors of digital signal processor (DSP) time reference synchronization. The performance principle of this technique also makes it a reliable backup option for transmission level synchrophasor detection when a global positioning system (GPS) is unviable. The correct performance of the proposed method is demonstrated by simulation results obtained with MATLAB.