Performance bounds and sensor placement for state estimation using PMUs with phase mismatch

Peng Yang, Zhao Tan, Ami Wiesel, Arye Nehorai

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Phasor measurement units (PMU) provide time-synchronized linear measurements for power system state estimation. In practice, the synchronization is not perfect for various reasons. In this paper we derive the posterior Cramér-Rao bound on the estimation error based on a realistic measurement model which takes into account the synchronization error. We then use a greedy algorithm for PMU placement based on the derived bound, and compare the results with other heuristics and the optimal solution through exhaustive search. Numerical examples demonstrate the performance improvement using the PMU placement profile from the greedy algorithm. The results also indicate that the greedy technique closely approximates the optimal solution.

Original languageAmerican English
Title of host publication2013 IEEE Power and Energy Society General Meeting, PES 2013
DOIs
StatePublished - 2013
Event2013 IEEE Power and Energy Society General Meeting, PES 2013 - Vancouver, BC, Canada
Duration: 21 Jul 201325 Jul 2013

Publication series

NameIEEE Power and Energy Society General Meeting
ISSN (Print)1944-9925
ISSN (Electronic)1944-9933

Conference

Conference2013 IEEE Power and Energy Society General Meeting, PES 2013
Country/TerritoryCanada
CityVancouver, BC
Period21/07/1325/07/13

Keywords

  • Phasor measurement unit
  • greedy algorithm
  • phase mismatch
  • posterior Cramér-Rao bound
  • sensor placement
  • state estimation

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