Decoupling Control Strategy for Conergy Three-Level Three Phase Grid Converter

Shi Min Shan; Wei Chi Ou; Ya Feng

doi:10.4028/www.scientific.net/AMR.986-987.1205

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 986-987Decoupling Control Strategy for Conergy...

Decoupling Control Strategy for Conergy Three-Level Three Phase Grid Converter

Abstract:

Conergy three-level NPC topology is often used in grid connected inverter due to its high efficiency, fewer switching devices and better EMI performance. Traditional half-bridge topology can be transformed to Conergy NPC topology by adding bi-direction switches. This paper proposed a novel control strategy for Conergy three-level NPC three phase grid converter with real and reactive power closed-loop controller in the synchronous d-q rotating frame. The power control loop is based on the feed forward decoupling of d-axis and q-axis components of the output current, thus the active and reactive power can be controlled separately. Additionally a proportional-integral controller is added to enhance the robustness of the power controller. Simulation results verify the effectiveness of the proposed strategy.

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Periodical:

Advanced Materials Research (Volumes 986-987)

Pages:

1205-1209

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.986-987.1205

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Online since:

July 2014

Authors:

Shi Min Shan*, Wei Chi Ou, Ya Feng

Keywords:

Closed-Loop Control, Decoupling Control, Grid Converter, Power Factor, Three-Level NPC

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