A Computationally Efficient RDFT Based Reference Signal Generator for Active Compensators

Борисов, К.; Ginn, Herbert L.; Chen, Guangda

doi:10.1109/pesc.2007.4342145

Cited by 7 publications

(4 citation statements)

References 18 publications

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“…It provides reference signal having identical steady state performance with improved computational efficiency and fast transient responses as compared to traditional filtering methods. In [29], RDFT technique is used to extract the real and imaginary components of fundamental current. The drawback of this approach is: it does not provide correct output during unbalance of line currents.…”

Section: Recursive Discrete Time Transform (Rdft Approach)mentioning

confidence: 99%

A Review on Shunt Active Power Filter Control Strategies

Singh¹,

Kour²,

Thanki³

et al. 2018

IJET

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Shunt active power filter (SAPF) has now become a well-known sophisticated technology to overcome current harmonics and reactive power compensation issues. In this paper a technical review of various control strategies for operation of SAPF has been presented. Control strategies such as reference current generation by time domain, frequency domain and soft computing approaches; voltage control for dc link voltage regulation and current control for generating switching patterns for voltage source inverter has been discussed. This paper aims to provide a broad understanding on SAPFs for various research and engineering applications.

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Section: Recursive Discrete Time Transform (Rdft Approach)mentioning

confidence: 99%

A Review on Shunt Active Power Filter Control Strategies

Singh¹,

Kour²,

Thanki³

et al. 2018

IJET

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“…The harmonic current reference is extracted from the nonlinear load current. Firstly, the fundamental component is calculated by the recursive discrete Fourier transform (RDFT) algorithm [34], and then the harmonic current reference is obtained by simply subtracting the fundamental component from the nonlinear load current. The dc bus voltage of the SAPF converter is regulated the by a PI controller, which forms the outer loop of the control system.…”

Section: System Configuration Descriptionmentioning

confidence: 99%

“…Using the RDFT algorithm described above, the fundamental current can be extracted from the nonlinear load current, and then the harmonic current can be obtained by subtracting the fundamental component from the nonlinear load current. The application of the RDFT can eliminate the requirement of low-pass filters in the d-q frame, and it exhibits several merits such as a fast transient response speed and excellent steady-state accuracy [34].…”

Section: B Rdft Based Harmonic Current Extraction Algorithmmentioning

confidence: 99%

Application of a C-Type Filter Based LCFL Output Filter to Shunt Active Power Filters

Liu¹,

Dai²,

Duan³

et al. 2013

Journal of Power Electronics

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This paper proposes and designs a new output filter called an LCFL filter for application to three phase three wire shunt active power filters (SAPF). This LCFL filter is derived from a traditional LCL filter by replacing its capacitor with a C-type filter, and then constructing an L-C-type Filter-L (LCFL) topology. The LCFL filter can provide better switching ripple attenuation capability than traditional passive damped LCL filters. The LC branch series resonant frequency of the LCFL filter is set at the switching frequency, which can bypass most of the switching harmonic current generated by a SAPF converter. As a result, the power losses in the damping resistor of the LCFL filter can be reduced when compared to traditional passive damped LCL filters. The principle and parameter design of the LCFL filter are presented in this paper, as well as a comparison to traditional passive damped LCL filters. Simulation and experimental results are presented to validate the theoretical analyses and effectiveness of the LCFL filter.

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“…This implies that the transient provided by a DCT filter lasts just half a cycle. This is an important improvement over the most widely used algorithms, such as discrete Fourier transform (DFT), fast Fourier transform (FFT), and recursive DFT (RDFT) [10], [14], [15], which need a full fundamental cycle [10], and reference generation techniques based on p-q theory, which may require more than two cycles even for low-order filters [15]. Furthermore, the recursive formulation of the RDFT may yield larger numerical errors [16], so its advantage of implementation simplicity is not always decisive.…”

Section: Introductionmentioning

confidence: 99%

Harmonic Identification Algorithms Based on DCT for Power Quality Applications

Yepes¹,

Freijedo²,

Doval-Gandoy³

et al. 2010

ETRI J

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The increasing demand for non‐sinusoidal currents affects the quality of distribution networks. Harmonic detection is a crucial step in the cancellation of those components by active power filters. In this paper, the discrete cosine transform (DCT) is compared with different implementations based on Fourier transforms, demonstrating their equivalences and the advantages provided by the former. We demonstrate that the phase error in the presence of grid frequency deviations and the transient length are reduced by half in comparison to the discrete Fourier transform. A novel algorithm is developed to provide frequency adaptation to the DCT, taking advantage of its good features. The window width is adjusted in real time according to the actual value of the grid fundamental frequency by means of a phase‐locked loop. A technique based on dithering is employed to overcome the limitation caused by the truncation of the window number of samples, so the frequency resolution is enhanced. The theoretical approach is verified by simulated and experimental results.

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A Computationally Efficient RDFT Based Reference Signal Generator for Active Compensators

Cited by 7 publications

References 18 publications

A Review on Shunt Active Power Filter Control Strategies

A Review on Shunt Active Power Filter Control Strategies

Application of a C-Type Filter Based LCFL Output Filter to Shunt Active Power Filters

Harmonic Identification Algorithms Based on DCT for Power Quality Applications

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