Impact of GPS signal quality on the performance of phasor measurements

Wide area measurements are becoming the basis of power system monitoring, protection and control. The frequency disturbance recorder (FDR) is actually a single-phase phasor measurement unit (PMU). It measures the voltage amplitude, angle and frequency from a single-phase 120-V wall outlet. Currently, the accuracy of synchrophasor measurements depends heavily on the precise time signal provided by global position system (GPS). This paper explores the impact of GPS signal loss on the measurement accuracy through a series of tests on FDR units including both regular and high sensitivity GPS receivers. It was shown the phase angle is more sensitive to GPS signal loss than frequency measurements.

[1]  I. Kamwa,et al.  PMU Configuration for System Dynamic Performance Measurement in Large Multiarea Power Systems , 2002, IEEE Power Engineering Review.

[2]  Zhiyong Yuan,et al.  Wide-Area Frequency Monitoring Network (FNET) Architecture and Applications , 2010, IEEE Transactions on Smart Grid.

[3]  A.G. Phadke,et al.  Synchronized phasor measurements in power systems , 1993, IEEE Computer Applications in Power.

[4]  J.A. Ferreira,et al.  Control scheme to improve DPFC performance during series converter failures , 2010, IEEE PES General Meeting.

[5]  Kenneth E. Martin,et al.  WACS-Wide-Area Stability and Voltage Control System: R&D and Online Demonstration , 2005, Proceedings of the IEEE.

[6]  M. Hemmingsson,et al.  Wide area system monitoring and control - terminology, phenomena, and solution implementation strategies , 2004, IEEE Power and Energy Magazine.

[7]  Zhiyong Yuan,et al.  Inter-area oscillation analysis using wide area voltage angle measurements from FNET , 2010, IEEE PES General Meeting.

[8]  Kyung Soo Kook,et al.  Analysis of Power System Disturbances Based on Wide-Area Frequency Measurements , 2007, 2007 IEEE Power Engineering Society General Meeting.

[9]  Yingchen Zhang,et al.  Monitoring power system disturbances at the distribution level , 2008, 2008 IEEE Power and Energy Society General Meeting - Conversion and Delivery of Electrical Energy in the 21st Century.