New Reference Generation for a Single-Phase Active Power Filter to Improve Steady State Performance

Ji-Heon Lee; Jong-Kyou Jeong; Byung-Moon Han; Byung-Yeol Bae

New Reference Generation for a Single-Phase Active Power Filter to Improve Steady State Performance

Vol. 10, No. 4, pp. 412-418, Jul. 2010

10.6113/JPE.2010.10.4.412

DSP(Digital Signal Processor)

FFT(Fast Fourier Transform)

Harmonic Phase-angle Delay

PLL(Phase-Locked

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Abstract

This paper proposes a new algorithm to generate a reference signal for an active power filter using a sliding-window FFT operation to improve the steady-state performance of the active power filter. In the proposed algorithm the sliding-window FFT operation is applied to the load current to generate the reference value for the compensating current. The magnitude and phaseangle for each order of harmonics are respectively averaged for 14 periods. Furthermore, the phase-angle delay for each order of harmonics passing through the controller is corrected in advance to improve the compensation performance. The steady-state and transient performance of the proposed algorithm was verified through computer simulations and experimental work with a hardware prototype. A single-phase active power filter with the proposed algorithm can offer a reduction in THD from 75% to 4% when it is applied to a non-linear load composed of a diode bridge and a RC circuit. The active power filter with the proposed reference generation method shows accurate harmonic compensation performance compared with previously developed methods, in which the THD of source current is higher than 5%.

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Cite this article

[IEEE Style]

J. Lee, J. Jeong, B. Han, B. Bae, "New Reference Generation for a Single-Phase Active Power Filter to Improve Steady State Performance," Journal of Power Electronics, vol. 10, no. 4, pp. 412-418, 2010. DOI: 10.6113/JPE.2010.10.4.412.

[ACM Style]

Ji-Heon Lee, Jong-Kyou Jeong, Byung-Moon Han, and Byung-Yeol Bae. 2010. New Reference Generation for a Single-Phase Active Power Filter to Improve Steady State Performance. Journal of Power Electronics, 10, 4, (2010), 412-418. DOI: 10.6113/JPE.2010.10.4.412.