Hae-Gwang Jung, Kyo-Beum Lee, Sin-Il Kang, Hyen-Young Lee, Oh-Joeng Kwon, and Seung-Ho Song, “An Active Damping Method of a Grid-connected PWM Inverter using an Instantaneous Power Theory,” 전력전자학술대회 논문집, pp. 85–87, 2008. > Paper

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Domestic Conference Hae-Gwang Jung, Kyo-Beum Lee, Sin-Il Kang, Hyen-Young Lee, Oh-Joeng Kwon, and Seung-Ho Song, “An Active Damping Method of a Grid-connected PWM Inverter using an Instantaneous Power Theory,” 전력전자학술대회 논문집, pp. 85–87, 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. 

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