Power system state estimation: Undetectable bad data

被引：10

作者：

Benedito, Raphael A. S. ^{[1
,2
]}

Alberto, Luis Fernando C. ^{[1
]}

Bretas, Newton G. ^{[1
]}

London, Joao Bosco A., Jr. ^{[1
]}

机构：

[1] Univ Sao Paulo EESC USP, Dept Elect Engn, BR-13566590 Sao Carlos, SP, Brazil

[2] Fed Technol Univ Parana UTFPR, Dept Elect Engn, BR-80230910 Curitiba, Parana, Brazil

来源：

INTERNATIONAL TRANSACTIONS ON ELECTRICAL ENERGY SYSTEMS | 2014年 / 24卷 / 01期

基金：

巴西圣保罗研究基金会;

关键词：

power systems state estimation; weighted least squares estimator; bad data detection; geometric interpretation; undetectability index; metering system design; measurement error estimation; HYPOTHESIS-TESTING IDENTIFICATION; MEASUREMENT PLACEMENT; OBSERVABILITY; ALGORITHM;

D O I：

10.1002/etep.1744

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper proposes an index, called Undetectability Index (UI), to classify the measurements according to their characteristics of not reflecting their errors into the residuals of the weighted least squares state estimator (WLS) from a geometric analysis of this estimator. Gross errors in measurements with high UIs are very difficult to be detected by methods based on residual analysis, because the errors in those measurements are masked, i.e. they are not reflected in their residuals. The paper also presents a very simple algorithm to compute the UI of all available measurements in a metering system. This algorithm is very simple and uses routines already available in the existing WLS Estimator software. Two UI applications are investigated (i) to design more reliable metering systems for bad data processing, i.e. metering systems formed by measurements with UI lower than a pre-specified value and (ii) to estimate the measurement errors. Several simulation results (with IEEE-14 and 30 bus systems) have validated the propositions. Copyright (c) 2013 John Wiley & Sons, Ltd.

引用

页码：91 / 107

页数：17

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