A Phasor-Data-Based State Estimator Incorporating Phase Bias Correction
2011 (English)In: IEEE Transactions on Power Systems, ISSN 0885-8950, Vol. 26, 111-119 p.Article in journal (Refereed) Published
With amplitude and phase information, time-synchronized measured phasor data of bus voltages and line currents can be used to calculate, without iterations, the voltage phasor on neighboring buses. In some phasor measurement units (PMUs), it has been observed that the voltage and current phasors exhibit phase biases, which can corrupt the conventional state estimator solution if it is augmented with such biased phasor data. This paper presents a new approach for synchronized phasor measurement-based state estimation, which can perform phasor angle bias correction given measurement redundancy. In this approach, polar coordinates are used as the state variables, because the magnitude and phase are largely independent measurements. The state estimation is formulated as an iterative least-squares problem, and its application to portions of the AEP high-voltage transmission system is illustrated.
Place, publisher, year, edition, pages
IEEE , 2011. Vol. 26, 111-119 p.
AEP high voltage transmission system;bus voltage;iterative least square problem;line current phasors;phase bias correction;phasor data based state estimator;polar coordinates;synchronized phasor measurement-based state estimation;time synchronized measured phasor data;voltage phasor measurement unit;high-voltage engineering;iterative methods;least squares approximations;phase measurement;power system measurement;power system state estimation;power transmission lines;
Other Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-63382DOI: 10.1109/TPWRS.2010.2047031ISI: 000286516100013OAI: oai:DiVA.org:kth-63382DiVA: diva2:482098
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QC 201201262012-01-262012-01-232012-01-26Bibliographically approved