A recursive least error squares algorithm for power system relaying and measurement applications

Sachdev, Manoj; Nagpal, M.

doi:10.1109/61.85841

Cited by 153 publications

(51 citation statements)

References 9 publications

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“…Based on the window length, DFT-based algorithms can be grouped into multicycle, one-cycle, or fractional-cycle DFT estimators performing recursive and nonrecursive updates [3]- [5]. To improve their accuracy, DFT-based algorithms can be used in combination with weighted least-squares [6] or Kalman filter-based methods [7]. Non-DFT-based SE methods have also been proposed.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Interpolated-DFT for Synchrophasor Estimation in FPGAs: Theory, Implementation, and Validation of a PMU Prototype

Romano

Paolone

2014

IEEE Trans. Instrum. Meas.

293

195

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Abstract-The literature on the subject of synchrophasor estimation (SE) algorithms has discussed the use of interpolated discrete Fourier transform (IpDFT) as an approach capable to find an optimal tradeoff between SE accuracy, response time, and computational complexity. Within this category of algorithms, this paper proposes three contributions: 1) the formulation of an enhanced-IpDFT (e-IpDFT) algorithm that iteratively compensates the effects of the spectral interference produced by the negative image of the main spectrum tone; 2) the assessment of the influence of the e-IpDFT parameters on the SE accuracy; and 3) the discussion of the deployment of IpDFTbased SE algorithms into field programmable gate arrays, with particular reference to the compensation of the error introduced by the free-

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Section: Introductionmentioning

confidence: 99%

Enhanced Interpolated-DFT for Synchrophasor Estimation in FPGAs: Theory, Implementation, and Validation of a PMU Prototype

Romano

Paolone

2014

IEEE Trans. Instrum. Meas.

293

195

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“…Fault situation can be identified by comparing the difference between the value between two consecutive cycles when higher than a threshold value based on Phasor (Sidhu et al 2002, Sachdev et al, 1991. But, its demerit being the modeling of fault resistance.…”

Section: Introductionmentioning

confidence: 99%

Effect of ultrasonic pretreatment on the osmotic drying of ash gourd during Murabba processing

Mandal¹,

Nath²,

Sahoo³

2017

Computer, Communication and Electrical Technology

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“…Reference [1] presents a review on some of static estimation techniques and proposed the use of recursive least error squares technique. Reference [2] proposed a digital filtering algorithm for estimation of symmetrical components.…”

Section: Introductionmentioning

confidence: 99%

New digital filter for unbalance distorted current and voltage estimation in power systems

Al-Hasawi

El-Naggar

2008

Electric Power Systems Research

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Abstract:-This paper presents a novel algorithm for identifying and measuring the symmetrical components of distorted three phase voltage or current waveforms in electrical power systems. The proposed algorithm is capable of estimating the symmetrical components as well as the harmonic contents of a given unbalanced distorted signal. The proposed technique is based on stochastic estimation theorem. The problem is formulated as an estimation problem and presented in state space form. The proposed algorithm used to estimate the positive, negative and zero components of unsymmetrical waveforms as well as the harmonic content of a given distorted signal. Application of the proposed algorithm has been conducted on various test cases. Among which a practical simulated power system has been implemented using EMTP. Various scenarios are carried out to simulate realistic situations of unsymmetrical waveforms. Effects of bad data on the solution accuracy are also studied. The speed of convergence is examined by changing the estimator initial conditions. Results obtained show that the proposed technique can estimate and track the symmetrical components of non-stationary three phase unbalance voltage or current waveforms in noisy environments. Fast accurate solutions are guaranteed regardless of the initial conditions. It is also shown that bad measurements have no effects on the final accuracy of the estimation.

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A recursive least error squares algorithm for power system relaying and measurement applications

Cited by 153 publications

References 9 publications

Enhanced Interpolated-DFT for Synchrophasor Estimation in FPGAs: Theory, Implementation, and Validation of a PMU Prototype

Enhanced Interpolated-DFT for Synchrophasor Estimation in FPGAs: Theory, Implementation, and Validation of a PMU Prototype

Effect of ultrasonic pretreatment on the osmotic drying of ash gourd during Murabba processing

New digital filter for unbalance distorted current and voltage estimation in power systems

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