Real-Time Estimation of Power System Frequency Using Nonlinear Least Squares

Chudamani, R.; Vasudevan, Krishna; Ramalingam, C.S.

doi:10.1109/tpwrd.2009.2021047

Cited by 98 publications

(59 citation statements)

References 18 publications

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“…The purpose of a complex Prony analysis is to find the values of k α , k β and k z that satisfy (12). By using (10) and (11), the three successive samples of (12) can be written in matrix form:…”

Section: Complex Prony Analysismentioning

confidence: 99%

“…Several methods for frequency estimation have been reported in the technical literature [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. Zero-crossingbased techniques are the most widely used methods for frequency estimation [1,2].…”

Section: Introductionmentioning

confidence: 99%

“…However, its performance is prone to error in unbalanced conditions. A variety of approaches, including adaptive neural networks (ANN) [8,9], least square techniques [10][11][12], Newton-type algorithms [13], Prony estimation [14], DFTs [15][16][17], and the maximum likelihood method [18,19] have also been used to estimate the frequency of power system signals.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Fundamental Frequency Estimation in Power Systems Using Complex Prony Analysis

Nam¹,

Lee²,

Kang³

et al. 2011

Journal of Electrical Engineering and Technology

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-A new algorithm for estimating the fundamental frequency of power system signals is presented. The proposed algorithm consists of two stages: orthogonal decomposition and a complex Prony analysis. First, the input signal is decomposed into two orthogonal components using cosine and sine filters, and a variable window is adapted to enhance the performance of eliminating harmonics. Then a complex Prony analysis that is proposed in this paper is used to estimate the fundamental frequency by approximating the cosine-filtered and sine-filtered signals simultaneously. To evaluate the performance of the algorithm, amplitude modulation and harmonic tests were performed using simulated test signals. The performance of the algorithm was also assessed for dynamic conditions on a singlemachine power system. The Electromagnetic Transients Program was used to generate voltage signals for a load increase and single phase-to-ground faults. The performance evaluation showed that the proposed algorithm accurately estimated the fundamental frequency of power system signals in the presence of amplitude modulation and harmonics.

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Section: Complex Prony Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fundamental Frequency Estimation in Power Systems Using Complex Prony Analysis

Nam¹,

Lee²,

Kang³

et al. 2011

Journal of Electrical Engineering and Technology

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“…To regulate the voltage in the PCC, a typical double loop PI control strategy was employed using fixed gain. Due to failure or switching, there is a change in the system matrix and in the eigenvalue; also the controller can give uncertain or indefinite results, if the controller integrator saturates in the presence of control error that becomes too large under the condition of sudden changes of load, configuration of the power system To have the dynamic response satisfactory, some techniques nonlinear using ANN and fuzzy logic have been sent to adapt the gain of the STATCOM PI controller during dynamic perturbations [8][9][10][11]. The main contribution of the work described is to highlight a new PI regulator scheme that has the advantage of being cheap, robust and provides better reactive power support compared to the conventional STATCOM PI controller while performing its main task of voltage regulation and not involves the use of intelligent or non-linear control technique that requires rule base or training which is a tedious and costly method of implementation.…”

Section: Introductionmentioning

confidence: 99%

A Power Frequency Phase and Transient Condition Control through STATCOM in Power System

Baghel¹,

Sahu²,

Mishra³

2017

IJERT

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-The article presents a hybrid scheme to improve the stability of the multi machine power system. The voltage regulation and the angular stability of the power system are improved with the help of STATCOM. A new standard controller for the STATCOM with a Supplemental Bandwidth Multiple Band Controller is used to improve the power supply voltage profile and to cushion the low frequency oscillation between zones. The selection of the wide area control signals is performed using the sensitivity of the eigenvalues expressed in terms of participation factor. The efficiency of the proposed scheme is tested in the IEEE 12 bus reference system to cover a wider range of operating conditions. The results of the simulation show that the proposed scheme stabilizes the system at multiple points of operation.

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“…Frequency estimation of sinusoids in noise is a frequently addressed problem in the signal processing literature because it has a wide variety of applications such as source localization, speech and audio signal analysis, biomedical engineering, communications, power delivery as well as instrumentation and measurement [1]- [5].…”

Section: Introductionmentioning

confidence: 99%