Parameter Estimation of Multiterminal Transmission Lines Using Joint PMU and SCADA Data

Mousavi-Seyedi, Seyed Sina; Aminifar, Farrokh; Afsharnia, Saeed

doi:10.1109/tpwrd.2014.2369500

Cited by 88 publications

(48 citation statements)

References 21 publications

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“…In [15], with field SCADA data, a multi-point parameter estimation model was developed based on the Levenberg-Marquardt algorithm. In [16] and [17], WAMS and SCADA data were incorporated for estimating multi-terminal transmission lines with a nonlinear weighted least square algorithm.…”

Section: Introductionmentioning

confidence: 99%

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Measurement-Based Transmission Line Parameter Estimation With Adaptive Data Selection Scheme

Zhang

et al. 2018

IEEE Trans. Smart Grid

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Abstract-Accurate parameters of transmission lines are critical for power system operation and control decision making. Transmission line parameter estimation based on measured data is an effective way to enhance the validity of the parameters. This paper proposes a multi-point transmission line parameter estimation model with an adaptive data selection scheme based on measured data. Data selection scheme, defined with time window and number of data points, is introduced in the estimation model as additional variables to optimize. The data selection scheme is adaptively adjusted to minimize the relative standard deviation (RSD) of estimated parameters. An iterative technique derived from the Newton method is adopted to solve the proposed model by fitting the relationship between the RSD and data selection scheme with exponential functions. Simulated data are applied to illustrate the performance of the proposed model. Some 500kV transmission lines from a provincial power system of China are estimated to demonstrate the applicability of the presented model. The superiority of the proposed model over fixed data selection schemes is also verified.Index Terms-Adaptive data selection, parameters estimation, power systems, supervisory control and data acquisition system (SCADA), transmission line, wide area measurement system (WAMS)

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Section: Introductionmentioning

confidence: 99%

“…Therefore, it is necessary to select appropriate measured data for estimation. In [16] and [17], a scheme of selecting 3 measurement points was proposed for estimation. In [10], 8 sets of simulated data within 16 minutes were chosen for estimation with even time interval of 2 minutes.…”

Section: Introductionmentioning

confidence: 99%

Measurement-Based Transmission Line Parameter Estimation With Adaptive Data Selection Scheme

Zhang

et al. 2018

IEEE Trans. Smart Grid

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“…In [29], the placement of the PMUs on the buses has been presented using intelligent algorithms, and a system observability analysis method in [30] is proposed to ensure fast and reliable results. It is known that, the PMUs of WAMS are not sufficient for static state estimation in most of the existing power systems because of the high price [31][32][33]. So, the state estimation with enough PMU measurements cannot be carried out normally at present.…”

Section: Introductionmentioning

confidence: 99%

A Mixed WLS Power System State Estimation Method Integrating a Wide-Area Measurement System and SCADA Technology

Jin

Shen

2018

Energies

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Abstract:To address the issue that the phasor measurement units (PMUs) of wide area measurement system (WAMS) are not sufficient for static state estimation in most existing power systems, this paper proposes a mixed power system weighted least squares (WLS) state estimation method integrating a wide-area measurement system and supervisory control and data acquisition (SCADA) technology. The hybrid calculation model is established by incorporating phasor measurements (including the node voltage phasors and branch current phasors) and the results of the traditional state estimator in a post-processing estimator. The performance assessment is discussed through setting up mathematical models of the distribution network. Based on PMU placement optimization and bias analysis, the effectiveness of the proposed method was proved to be accurate and reliable by simulations of different cases. Furthermore, emulating calculation shows this method greatly improves the accuracy and stability of the state estimation solution, compared with the traditional WLS state estimation.

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“…[8][9][10][11][12][13][14][15][16][17][18][19] In particular, the work in Lowe 19 provides a very good review and discussion of the main methods used to estimate the line constants of perfectly transposed and untransposed 3-phase lines, with emphasis on the untransposed case.…”

Section: Introductionmentioning

confidence: 99%

A rigorous matrix procedure for calculating the line constants and wave parameters of uniform MTLs using SMT/PMU

Faria

Araneo

2017

Int Trans Electr Energ Syst

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SummaryReal-time monitoring of the operation state of wide-area transmission line links has become possible with the help of phasor meter units. Synchronized information acquired by phasor meter units needs to be adequately processed to permit the accurate estimation of the line constants of the transmission link. In this paper, a novel general rigorous compact procedure for correctly processing the measured voltage and current phasors of uniform multiconductor transmission line systems is proposed. The procedure based on the ABCD matrix and on modal analysis techniques applies to transposed or untransposed multiconductor transmission lines, with arbitrary geometry, number of conductors, and length. The proposed algorithm, adequate for multiport structures, avoids the approximations usually required by ordinary methods mostly focused on lumped parameters and on 2-port approaches. The proposed matrix procedure is illustrated and validated using simulation results. A historical perspective of SMT/PMU can be found elsewhere.2,3 Very recent review papers on the subject, covering state-of-the-art applications and offering exhaustive bibliographic references, are available. 4,5Among the various applications of SMT/PMU, 6,7 we are interested here in the important topic of remotely monitoring the operation state of high-or extrahigh-voltage long overhead power lines (MTL systems). This can be done by resorting to synchronized measurements of MTL voltage and current phasors, enabling the estimation of the power line constants (per unit length impedance Z and per unit length admittance Y). Once the computed estimates are compared with reference values stored in a database the state of operation of the MTL system can be checked, allowing planners to make judicious decisions.Although not new, the topic of the estimation of line constants using SMT/PMU data has been attracting more and more attention. [8][9][10][11][12][13][14][15][16][17][18][19] In particular, the work in Lowe 19 provides a very good review and discussion of the main methods used to estimate the line constants of perfectly transposed and untransposed 3-phase lines, with emphasis on the untransposed case. --------------------------------------------------------------This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Parameter Estimation of Multiterminal Transmission Lines Using Joint PMU and SCADA Data

Cited by 88 publications

References 21 publications

Measurement-Based Transmission Line Parameter Estimation With Adaptive Data Selection Scheme

Measurement-Based Transmission Line Parameter Estimation With Adaptive Data Selection Scheme

A Mixed WLS Power System State Estimation Method Integrating a Wide-Area Measurement System and SCADA Technology

A rigorous matrix procedure for calculating the line constants and wave parameters of uniform MTLs using SMT/PMU

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