Identification of short transmission-line parameters from synchrophasor measurements

Shi, Di; Tylavsky, Daniel; Logic, Naim; Koellner, Kristian

doi:10.1109/naps.2008.5307354

Cited by 79 publications

(71 citation statements)

References 6 publications

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“…However, in practice delivering this estimation with sufficient accuracy and robustness has proven challenging due to factors like poor measurement quality, variations in line construction and the inclusion of short cable runs in the transmission corridor [30][31][32]. For example, for a typical transmission line with an X/R ratio of 10, an angle error of 0.57°(equal to the maximum 1% total vector error given in the C37.118.1 std) will result in a 10% error in the estimate of resistance.…”

Section: Line Parameter Estimationmentioning

confidence: 99%

“…Figure 5 shows 7 days of estimated resistance and reactance for a long line. Comparison of these estimated values with the nominal value shows that the method performs well in the presence of the combination of systematic and random errors that appear in actual power system measurements and are not considered in much of the existing work on LPE [30][31][32]. Systematic errors are a significant threat to LPE, as they will lead to fixed errors that may contribute to errors in decision making (e.g.…”

Section: Line Parameter Estimationmentioning

confidence: 99%

See 1 more Smart Citation

Deployment and demonstration of wide area monitoring system in power system of Great Britain

Wall

Dattaray

Jin

et al. 2016

J. Mod. Power Syst. Clean Energy

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The creation of a suitable wide area monitoring system (WAMS) is widely recognized as an essential aspect of delivering a power system that will be secure, efficient and sustainable for the foreseeable future. In Great Britain (GB), the deployment of the first WAMS to monitor the entire power system in real time was the responsibility of the visualization of real time system dynamics using enhanced monitoring (VISOR) project. The core scope of the VISOR project is to deploy this WAMS and demonstrate how WAMS applications can in the near term provide system operators and planners with clear, actionable information. This paper presents the wider scope of the VISOR project and the GB wide WAMS that has been deployed. Furthermore, the paper describes some of the WAMS applications that have been deployed and provides examples of the measurement device performance issues that have been encountered during the project.

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Section: Line Parameter Estimationmentioning

confidence: 99%

Section: Line Parameter Estimationmentioning

confidence: 99%

Deployment and demonstration of wide area monitoring system in power system of Great Britain

Wall

Dattaray

Jin

et al. 2016

J. Mod. Power Syst. Clean Energy

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show abstract

“…In addition to the outlined fields the actual transmission lines parameters may find wide application for wires temperature control, fault location [8], defining automated protection systems thresholds [9] etc. Hence the problem of defining the valid equivalent circuit parameters is of crucial importance in terms of power system controllability, stability and reliability.…”

Section: Introductionmentioning

confidence: 99%

Defining the parameters of a power transmission line equivalent circuit on the basis of phasor measurements

Kovalenko

Berdin

2017

J. Phys.: Conf. Ser.

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Although considered to be constant, these parameters depend upon the element actual load, weather conditions and other factors. Consequently, the results of the outlined problems may be subject to significant bias due to the difference between the reference and the actual elements parameters. Hence the task of identifying the actual equivalent circuit parameters is of paramount importance. In terms of power system control the actual measurements are to be used in order to provide the relevant information on the considered power system component state. As for the transmission lines, the state measurements must include the currents and voltages at both ends of the line regarding the Π-shaped equivalent circuit. That said, at present time the equivalent circuit parameters might be defined involving modern systems of phasor measurements (WAMS) on a real-time basis. The method of defining the equivalent circuit parameters based on phasor measurements along with general relations between power system state parameters is proposed. It should be noted as well that while dealing with the actual WAMS data obtained from power system the measurement errors influence the results quite substantially.

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“…Traditionally, TL parameters have been estimated based on the tower geometries, conductor dimensions, estimates of actual line length, conductor sag, and other factors [1]. These calculated parameters are based on assumptions and approximations.…”

mentioning

confidence: 99%

“…Extensive research has been conducted in identifying TL impedances using synchrophasor measurements [1][2][3][4][5][6] Four methods based on TL linear/nonlinear models were presented and compared in Ref. [1].…”

mentioning

confidence: 99%

Transmission Line Sequence Impedances Identification Using PMU Measurements

Hong¹,

Zhao²,

Shi³

et al. 2015

JEPE

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An online TL (transmission line) impedance TPIS (transmission line parameter identification system) using PMU (phasor measurement unit) was recently developed and implemented at CSG (china southern power grid company). Traditional approaches for TL impedance calculation only approximate the effect of conductor sags and ignore the dependence of impedances on temperature variation. Utilizing PMU measurements may improve the accuracy of TL parameters calculation. The challenge is that the parameters identified are very sensitive to noise and errors in PMU measurements, which are difficult to quantify and can be uncertain under different system operating/loading condition. TPIS provides an innovative yet practical problem formulation for TL sequence parameter estimation based on least-squares with linear constraints. A bootstrapping-based resampling technique is developed and a new metric is proposed to determine the credibility of the estimated sequence impedances. This paper discusses the proposed methodologies, challenges, as well as implementation issues identified during the development of TPIS.

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Identification of short transmission-line parameters from synchrophasor measurements

Cited by 79 publications

References 6 publications

Deployment and demonstration of wide area monitoring system in power system of Great Britain

Deployment and demonstration of wide area monitoring system in power system of Great Britain

Defining the parameters of a power transmission line equivalent circuit on the basis of phasor measurements

Transmission Line Sequence Impedances Identification Using PMU Measurements

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