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http://dx.doi.org/10.5207/JIEIE.2003.17.3.103

A Study on the State Estimation for Distribution Substations  

이흥재 (광운대학교 전기공학과)
박성민 (광운대학교 전기공학과)
이경섭 (광운대학교 전기공학과)
Publication Information
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers / v.17, no.3, 2003 , pp. 103-109 More about this Journal
Abstract
The validity of measured data is fundamental factor for the power system automation Measured values could have errors that are caused by the communication errors and malfunctioning measuring devices. The accuracy and reliability of measured values at a substation is an important condition for robust and fault tolerant automata. Errors can be reduced by state estimation, however, global reliability of state estimation goes down in case of the existence of some bad data In this paper, a least square state estimation and bad sensor detection algorithm based on chi-square theory, ale proposed and it is applied to a domestic 154kV distribution substations. A simulator together with user friendly graphic users interface is developed using C language and Visual Basic. TCP/IP is equipped for future connection with other operation systems.
Keywords
state estimation; least square algorithm; bad data detection; chi-square; substation; simulator;
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