Análise de observabilidade baseada em variâncias de medidas estimadas = : Observability analysis based estimated measures variances / Observability analysis based estimated measures variances

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

15/08/2012

RESUMO

The purpose of this work is to present a complete methodology for observability analysis of electric power systems. The observability of the network is determined from the trace of the covariance matrix of the measurement estimate, the variance of the estimated power flow allow the identification of observable islands and the restoration of observability is performed from the variance of the measurement estimate. The variances required are obtained from the regularized linearized gain matrix. Besides the measurements available, in the formation of regularized gain matrix allows the existence of voltage angle pseudomeasurements on all buses of the network. The regularized least squares power system state estimation and the methodology of analysis of the variance of the estimated power flow is based in [Almeida, Garcia e Asada, 2011]. The new contributions of this work are the observability checking mechanism, based on the trace of the covariance matrix of the measurement estimate, the mechanism of restoration of observability, developed from the analysis of variance of the measurement and the inclusion of synchronized phasor measurement in the mathematical formulation utilized.

ASSUNTO(S)

sistemas de energia elétrica - estimação de estado estimação de estado generalizado análise de variância analysis of variance electric power systems estimation of generalized state electric power systems sistemas de energia elétrica análise de covariância analysis of covariance

ACESSO AO ARTIGO

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