GPS signal loss in the wide area monitoring system: Prevalence, impact, and solution

Journal Article · Sun Mar 19 00:00:00 EDT 2017 · Electric Power Systems Research

DOI:https://doi.org/10.1016/j.epsr.2017.03.004· OSTI ID:1399392

Yao, Wenxuan ^[1]; Zhou, Dao ^[1]; Zhan, Lingwei ^[1]; Liu, Yong ^[1]; Cui, Yi ^[1]; You, Shutang ^[1]; Liu, Yilu ^[2]

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1. Univ. of Tennessee, Knoxville, TN (United States)
2. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

The phasor measurement unit (PMUs), equipped with Global Positioning System (GPS) receivers for precise time synchronization, provides measurements of voltage and current phasors at different nodes of the wide area monitoring system. However, GPS receivers are likely to lose satellite signals due to various unpredictable factors. The prevalence of GPS signal loss (GSL) on PMUs is first investigated using real PMU data. The historical GSL events are extracted from a phasor data concentrator (PDC) and FNET/GridEye server. The correlation between GSL and time, spatial location, solar activity are explored via comprehensive statistical analysis. Furthermore, the impact of GSL on phasor measurement accuracy has been studied via experiments. Finally, several potential solutions to mitigate the impact of GSL on PMUs are discussed and compared.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC05-00OR22725
• OSTI ID: 1399392
• Journal Information: Electric Power Systems Research, Journal Name: Electric Power Systems Research Journal Issue: C Vol. 147; ISSN 0378-7796
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

47 OTHER INSTRUMENTATION
FNET/GridEye
GPS signal loss
Phasor data concentrators
Phasor measurement unit
Wide area monitoring system