SynchroPhasor_Measurements_SystemArchitecture_and_Performance_Evaluation_in_Supporting_Wide_Area_App

SynchroPhasor_Measurements_SystemArchitecture_and_Performance_Evaluation_in_Supporting_Wide_Area_App

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1 Abstract --The infrastructure of phasor measurements have evolved over the last 15 years from isolated measurement units to networked measurement systems with footprints beyond individual utility companies. This phasor measurement network, to a great extent, is a bottom-up self-evolving process except some local systems built by design. Given the number of phasor measurement units (PMUs) in the system is small (currently about 70 in each of the western and eastern interconnections in North America), the current phasor network architecture satisfies today’s operational requirements. However, the architecture will become a bottleneck when large number of PMUs are installed (e.g. >1000~10000). The need for phasor architecture design has yet to be addressed. This paper reviews the current phasor networks and investigates future architectures, as related to the efforts undertaken by the North American SynchroPhasor Initiative (NASPI). Then it continues to present staged system tests to evaluate the performance of phasor networks, which is a common practice in the Western Electricity Coordinating Council (WECC) system. This is followed by field measurement evaluation and the implication of phasor quality issues on phasor applications. Index Terms --Synchronized Phasor Measurements, Phasor Measurement Unit, Wide Area Measurement System (WAMS), North American SynchroPhasor Initiative (NASPI). I. INTRODUCTION HE proliferation of phasor measurement units (PMU) in power grids represents an evolutionary change in power system measurements, monitoring and control but also a unprecedented challenge in power system data communication and management. As phasor measurements hold the promise of providing a fast dynamic picture of power grid status, major utility companies are actively deploying phasor networks in both the western and eastern interconnections of North America. The phasor network development is so far a self-evolving process, except some local systems are built by design. The western and eastern interconnections each have about 70 PMUs installed. The phasor data concentrator (PDC) at the Bonneville Power The Pacific Northwest National Laboratory is operated by Battelle for the U.S. Department of Energy under Contract DE-AC06-76RL01830. Z. Huang, and J. Dagle are with Battelle – Pacific Northwest National Laboratory, Richland, WA 99352 USA (e-mails: zhenyu.huang@pnl.gov, and jeff.dagle@pnl.gov). Administration (BPA) transmits about 3GB/day, roughly half of all the phasor measurements in the western interconnection. Given the trend of more and more PMUs being installed, a full blown WECC phasor network (1/3 of the buses are monitored) would generate about 0.5TB/day. How the phasor network should be constructed to handle data communication and management of such a large volume of phasor measurements needs additional consideration and design. Another challenge is how to evaluation the performance of phasor networks to ensure the appropriate support to phasor applications.
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This note was uploaded on 01/29/2011 for the course ENGR 52 taught by Professor Mcmillan during the Spring '10 term at Baylor Med.

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SynchroPhasor_Measurements_SystemArchitecture_and_Performance_Evaluation_in_Supporting_Wide_Area_App

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