Quantification of Minimum Unbalance Required for Accurate Estimation of Sequence Parameters of Transmission Line using PMU Data

Goklani, Hemantkumar; Gajjar, Gopal; Soman, S. A.

doi:10.1109/pesgm40551.2019.8974019

Cited by 6 publications

(2 citation statements)

References 9 publications

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“…The proposed algorithm, which is used also in its single-branch version, is compared with two methods designed to estimate three-phase line parameters from PMU measurements. The first algorithm (Method A) is based on a two-step estimation of shunt admittance and impedance matrices of a branch [14], while the second algorithm (Method B) uses a robust estimator for the shunt and line admittance parameters starting from current equations at both ends [15]. The first method has been generalized to consider also nontransposed lines as the proposed one.…”

Section: B Multiple Branches Approachmentioning

confidence: 99%

PMU-Based Estimation of Systematic Measurement Errors, Line Parameters, and Tap Changer Ratios in Three-Phase Power Systems

Pegoraro

Sitzia

Solinas

et al. 2022

IEEE Trans. Instrum. Meas.

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The availability of accurate data is fundamental for several monitoring and control applications of modern power grids. Nevertheless, the knowledge of critical data such as transmission line and transformer parameters is often affected by uncertainty. This can lead to important problems in the correct management of the power systems. In spite of a monitoring infrastructure that is being renewed thanks to new generation devices providing synchronized measurements, the actual values of line parameters and tap changer ratios are still affected by uncertainty sources that need to be properly considered. The behaviour of all the elements involved in the measurement chain must be duly modelled. This paper proposes an improved method to carry out the simultaneous estimation of line parameters, tap changer ratios, and systematic measurement errors for a three-phase power system. The proposed method is based on the suitable modelling of the measurement chain and on three-phase constraint equations (voltage drop and current balance) of all the components involved. Its effectiveness is confirmed by tests performed on a IEEE 14 bus test system reproduced as a threephase system under different operative conditions.

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Section: B Multiple Branches Approachmentioning

confidence: 99%

PMU-Based Estimation of Systematic Measurement Errors, Line Parameters, and Tap Changer Ratios in Three-Phase Power Systems

Pegoraro

Sitzia

Solinas

et al. 2022

IEEE Trans. Instrum. Meas.

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“…At the moment, there are several dozen researches in which equations and algorithms for estimation the parameters of the power lines π-equivalent according to PMU data are proposed [4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Estimation of 500 kV power transmission line parameters with PMU

et al. 2021

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This work is devoted to the research of the real-time estimation of 500 kV power transmission lines parameters with PMU based on the solution of the optimization problem of minimizing the root-mean-square deviations of the specific line parameters or the sum of the modules of the correlation coefficients between the specific parameters and the sum of the squares of the voltages or currents measured at the ends of the line. Independent optimization variables are the correction factors of the measuring systems of currents and voltages. Based on an artificially simulated PMU dataset with specified Gaussian noise and systematic errors, it is shown that the use of correlation coefficients in the objective function is more effective than standard deviations. All 5 estimated coefficients turned out to be closer to the reference values. The results of calculations are obtained from the data of real PMUs for an operating 500 kV line with a length of 504.6 km. The deviation of the specific capacitive conductivity from the nominal value is 0.13%, compared with - 0.29% when using the sum of squares of deviations as an objective function.

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Innovative method to identify the impedance parameters of a three-phase electric power medium-size transmission line

Abdolkhalig

2023

Electr Eng

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Quantification of Minimum Unbalance Required for Accurate Estimation of Sequence Parameters of Transmission Line using PMU Data

Cited by 6 publications

References 9 publications

PMU-Based Estimation of Systematic Measurement Errors, Line Parameters, and Tap Changer Ratios in Three-Phase Power Systems

PMU-Based Estimation of Systematic Measurement Errors, Line Parameters, and Tap Changer Ratios in Three-Phase Power Systems

Estimation of 500 kV power transmission line parameters with PMU

Innovative method to identify the impedance parameters of a three-phase electric power medium-size transmission line

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