Hea-Gwang Jung, Kyo-Beum Lee, Sin-Il Kang, Hyen-Young Lee, Oh-Joeng Kwon, and Seung-Ho Song, "Performance Improvement of a Grid-connected PWM Inverter using a Power Theory," The Transactions of the Korean Institute of Power Electronics, vol.13, no. 4, pp. > Paper

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Paper

Domestic Journals Hea-Gwang Jung, Kyo-Beum Lee, Sin-Il Kang, Hyen-Young Lee, Oh-Joeng Kwon, and Seung-Ho Song, "Performance Improvement of a Grid-connected PWM Inverter using a Power Theory," The Transactions of the Korean Institute of Power Electronics, vol.13, no. 4, pp. 319–327, Aug. 2008.

2008

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The demand of a three phase PWM inverter for the purpose of power control or grid-connecting is increasing. This inverter is

connected to a grid through an L-filter or LCL-filter to reduce the harmonics caused by switching. An LCL-filter can reduce the

harmonic of a low switching frequency and generate a satisfactory level of grid side current with a relatively low-inductance than an

L-filter. But the additional poles caused by the LC part affects a stability problem due to induced resonance of the system. This paper

presents a compensation method using a power theory to improve performance, the designed LCL-filter system and to reduce the

stability problems caused by resonance. The effectiveness of the proposed algorithm is verified by simulations and experiments. 

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