A Modified Demodulation Technique for Single-Phase Grid Voltage Fundamental Parameters Estimation

Reza, Md. Shamim; Ciobotaru, Mihai; Agelidis, Vassilios G.

doi:10.1109/tie.2014.2366720

Cited by 37 publications

(23 citation statements)

References 28 publications

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“…Phase jump and harmonics (Case-7) viii. Voltage sag, frequency step, phase jump and harmonics (Case-8) The experimental performance of the proposed technique is also compared with a similar competing technique based on a frequency adaptive demodulation method [37]. This technique is similar to the proposed one, as both techniques are based on the demodulation method and can provide the estimation of the fundamental voltage amplitude, frequency and phase angle.…”

Section: Resultsmentioning

confidence: 99%

“…In this case, a separate frequency estimation algorithm can be used, but it increases the computational burden of the technique [35,36]. To avoid the separate frequency estimation algorithm, an interdependent loop can be included in the demodulation method for feeding back the estimated frequency [37]. In this approach, a quadrature oscillator is also integrated to reject second harmonic oscillations generated by the demodulation of the fundamental voltage component.…”

Section: Introductionmentioning

confidence: 99%

“…It can also reject the negative effects caused by DC offset and harmonics, and meet the standard requirements. When compared with a frequency adaptive demodulation technique reported in [37], the proposed technique is less sensitive to DC offset, can provide faster frequency estimation, avoids interdependent loop, trigonometric and inverse trigonometric functions operation.…”

Section: Introductionmentioning

confidence: 99%

“…The proposed technique and its simulation results are reported in Section II and Section III, respectively. The experimental performance of the proposed and the frequency adaptive demodulation [37] techniques are compared in Section IV. Finally, the conclusions are summarized in Section V.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A Demodulation-Based Technique for Robust Estimation of Single-Phase Grid Voltage Fundamental Parameters

Reza

Agelidis

2017

IEEE Trans. Ind. Inf.

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This paper proposes a robust technique for the single-phase grid voltage fundamental amplitude, frequency and phase angle estimation under distorted grid conditions. It is based on a demodulation method tuned at a fixed frequency. It does not have stability issue due to an open loop structure, does not require real-time evaluation of trigonometric and inverse trigonometric functions, and also avoids the use of look-up table. It can provide accurate estimation of the singlephase grid voltage fundamental parameters under DC offset and harmonics. When compared with a frequency adaptive demodulation technique, the proposed one is less affected by DC offset, can provide faster frequency estimation and also avoids interdependent loop, trigonometric and inverse trigonometric functions operation. Simulation and experimental results are presented to verify the performance of the proposed technique.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Demodulation-Based Technique for Robust Estimation of Single-Phase Grid Voltage Fundamental Parameters

Reza

Agelidis

2017

IEEE Trans. Ind. Inf.

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“…The popular PSMAs include the discrete fourier transform (DFT)-based methods [4][5][6][7][8][9][10][11], demodulation [12], Kalman filter [13,14], least squares [15,16], wavelet transform [17,18], level crossing [19], subspace algorithm [20], neural network [21], Newton algorithm [22], phase-locked loop (PLL) [23], etc. Some papers prove the effectiveness of the aforementioned methods, such as the DFT-based method having good harmonics rejection and low computation burden, so it can be implemented simply by hardware.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Flat Window-Based Synchrophasor Measurement Algorithm for P Class PMUs

2019

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Accurate and fast synchrophasor measurement, especially under dynamics and distortions, is crucial for control and protection of power grid. The dynamics and distortions in the power grid may occur simultaneously, which increase the complexity of the problem. To address this issue, an enhanced flat window-based P class synchrophasor measurement algorithm (EFW-PSMA) is proposed in this paper. Firstly, an EFW is design based on the least square (LS) approach. Secondly, the EFWs are adopted as the low pass filters (LPFs) in the EFW-PSMA structure to extract the fundamental component. Finally, the frequency and rate of change of frequency (ROCOF) are estimated based on the LS approach. The EFW-PSMA has a simple implementation structure and low computation complexity. Theoretical analysis and simulation results verify the superiority of the method, especially under stressed grid conditions, where several types of disturbances occur simultaneously. The maximum total vector error (TVE) is 0.3% under the most stressed conditions that all the disturbances specified in the benchmark tests specified in the IEC/IEEE 60255-118-1 occur simultaneously. It means that the EFW-PSMA could be used for the protection applications of the synchrophasor measurement algorithm, which is important for PMUs to fast response in the control and protection actions in order to avert a possible collapse or other abnormal conditions.

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Demodulation type single‐phase PLL with DC offset rejection

Ahmed

Benbouzid

2020

Electron. lett.

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This Letter proposes demodulation type PLL for phase and frequency estimation of single-phase system that can reject DC offset. Using results from the adaptive estimation literature, this Letter proposes a linear parametric model-based initial phase angle estimation approach. Then by using differentiation and integration operation on the estimated initial phase angle, the frequency is estimated. This avoids the use of any low-pass filter unlike conventional demodulation-based technique. Moreover, unlike existing demodulation-based technique, the proposed technique can completely reject DC offset. Comparative experimental results, provided with state-of-the-art DC offset rejection-based enhanced phase locked-loop, clearly demonstrate the suitability of the proposed technique.

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A Modified Demodulation Technique for Single-Phase Grid Voltage Fundamental Parameters Estimation

Cited by 37 publications

References 28 publications

A Demodulation-Based Technique for Robust Estimation of Single-Phase Grid Voltage Fundamental Parameters

A Demodulation-Based Technique for Robust Estimation of Single-Phase Grid Voltage Fundamental Parameters

Enhanced Flat Window-Based Synchrophasor Measurement Algorithm for P Class PMUs

Demodulation type single‐phase PLL with DC offset rejection

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