KIEE - The Transactions of the Korean Institute of Electrical Engineers

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The Transactions of the Korean Institute of Electrical Engineers

The Transactions of the Korean Institute of Electrical Engineers

ISO Journal TitleTrans. Korean. Inst. Elect. Eng.

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Title	Performance Improvement of DC-link Control for a Dynamic Voltage Restorer with Power Feedforward Compensation
Authors	지균선(Ji, Kyun Seon) ; 주성탁(Jou, Sung Tak) ; 이교범(Lee, Kyo-Beum)
DOI	https://doi.org/10.5370/KIEE.2015.64.9.1297
Page	pp.1297-1305
ISSN	1975-8359
Keywords	Dynamic voltage restorer ; Power feedforward ; DC-link voltage control
Abstract	This paper proposes a power feedforward technique for the performance improvement of DC-link voltage control in the dynamic voltage restorer (DVR). The DC-link Voltage is able to be unstable for an instant owing to any change in the load and voltage sag. The distortion of the DC-link voltage leads to the negative influence on the performance of DVR. To mitigate the distortion of the DC-link voltage, the power feedforward component is calculated by the load power and the grid voltage, and then it is added to the reference current of the conventional DC-link voltage controller. By including output power feedforward component on the DC-link controller, the DC-link voltage can settle down more quickly than when the conventional DC-link voltage controller applied. The proposed technique was validated through the simulation and experimental results.

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