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Control of the Neutral Leg in Three-Phase Four-Wire Inverter Using Proportional-Resonant Controller
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 Title & Authors
Control of the Neutral Leg in Three-Phase Four-Wire Inverter Using Proportional-Resonant Controller
Han, Jungho; Song, Joongho;
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 Abstract
In 3-phase 4-wire inverter, the unbalanced loads cause to increase the neutral current which brings the voltage deviation between the split dc-link capacitors to be larger. In order to solve this problem, a neutral leg is provided additively to the ordinary inverter circuit and the associated control methods are devised. This paper proposes a new neutral-leg controller based on a PR controller and shows relatively good performance even under unbalanced linear loads and nonlinear loads. The proposed control strategy illustrates its effectiveness under the various operating conditions through simulation works.
 Keywords
Three-Phase Four-Wire Inverter;Dc-Link Balancing Control;Proportional-Resonant Control;
 Language
Korean
 Cited by
 References
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