Reliability Analysis of Phasor Measurement Unit Considering Data Uncertainty

Author

Yang Wang ; Wenyuan Li ; Peng Zhang ; Bing Wang ; Jiping Lu

Author_Institution

State Key Lab. of Power Transm. Equip. & Syst. Security & New Technol., Chongqing Univ., Chongqing, China

Volume

27

Issue

3

fYear

2012

Firstpage

1503

Lastpage

1510

Abstract

This paper proposes a combined statistical and fuzzy Markov method for reliability evaluation of phasor measurement unit (PMU). The major purpose is to deal with uncertainties of reliability data in PMU. The membership functions of reliability parameters can be built based on statistics and fuzzy set theory. The fuzzy hierarchical Markov models are presented to quantify membership functions of multiple reliability indices of the entire PMU. A fuzzy sensitivity analysis index is developed to estimate the effects of parameter uncertainties on the uncertainty of PMU reliability and identify the most sensitive component(s). Numerical results are provided to demonstrate the effectiveness of the proposed techniques.

Keywords

Markov processes; fuzzy set theory; phasor measurement; power system reliability; sensitivity analysis; PMU; data uncertainty; fuzzy hierarchical Markov models; fuzzy sensitivity analysis index; fuzzy set theory; membership functions; multiple reliability indices; parameter uncertainties; phasor measurement unit; statistical method; Global Positioning System; Maintenance engineering; Markov processes; Phasor measurement units; Power system reliability; Reliability; Uncertainty; Data uncertainty; Markov model; fuzzy reliability; phasor measurement unit;

fLanguage

English

Journal_Title

Power Systems, IEEE Transactions on

Publisher

ieee

ISSN

0885-8950

Type

jour

DOI

10.1109/TPWRS.2012.2183901

Filename

6153413