A Method for Accurate Transmission Line Impedance Parameter Estimation

Ritzmann, D, Wright, PS, 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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Abstract

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
Peer-reviewed:	Yes
Date Deposited:	13 Jul 2018 14:01
Publisher:	Institute of Electrical and Electronics Engineers
Additional Information:	("(c) 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.")
Divisions:	Faculties > Science and Engineering
Subject terms:	0906 Electrical And Electronic Engineering, Electrical & Electronic Engineering
URI:	https://e-space.mmu.ac.uk/id/eprint/620868
DOI:	https://doi.org/10.1109/TIM.2016.2556920
ISSN	0018-9456

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