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A method for accurate transmission line impedance parameter estimation

Ritzmann, D., Wright, P. S., Holderbaum, W. and Potter, B. (2016) A method for accurate transmission line impedance parameter estimation. IEEE Transactions on Instrumentation and Measurement, 65 (10). pp. 2204-2213. ISSN 0018-9456

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To link to this item DOI: 10.1109/TIM.2016.2556920

Abstract/Summary

Real-time estimation of power transmission line impedance parameters has become possible with the availability of synchronized phasor (synchrophasor) measurements of voltage and current. If sufficiently accurate, the estimated parameter values are a powerful tool for improving the performance of a range of power system monitoring, protection, and control applications, including fault location and dynamic thermal line rating. The accuracy of the parameter estimates can be reduced by unknown errors in the synchrophasors that are introduced in the measurement process. In this paper, a method is proposed with the aim of obtaining accurate estimates of potentially variable impedance parameters, in the presence of systematic errors in voltage and current measurements. The method is based on optimization to identify correction constants for the phasors. A case study of a simulated transmission line is presented to demonstrate the effectiveness of the new method, which is better in comparison with a previously proposed method. The results, as well as limits, and the potential extensions of the new method are discussed.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Science > School of the Built Environment > Construction Management and Engineering
Faculty of Life Sciences > School of Biological Sciences > Department of Bio-Engineering
Interdisciplinary centres and themes > Centre for Technologies for Sustainable Built Environments (TSBE)
Interdisciplinary centres and themes > Energy Research
ID Code:66551
Uncontrolled Keywords:Current measurement;Impedance;Measurement uncertainty;Power transmission lines;Systematics;Transmission line measurements;Voltage measurement;Accuracy;admittance measurement;impedance measurement;optimization methods;parameter estimation;phasor measurement unit (PMU);transmission line measurements.
Publisher:IEEE

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