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무변압기형 연료전지/태양광용 PCS의 직류분 보상기법

Title
무변압기형 연료전지/태양광용 PCS의 직류분 보상기법
Translated Title
DC Offset Current Compensation Method of Transformeless Fuel Cell/PV PCS
Authors
박봉희김승민최주엽최익이상철이동하이영권
DGIST Authors
이상철; 이동하
Issue Date
2013-12
Citation
한국태양에너지학회 논문집, 33(6), 92-97
Type
Article
Keywords
직류분(DCoffset)인버터(Inverter)무변압기형(Transformerless)태양광(PhotoVoltaic)연료전(Fuel Cell)
ISSN
1598-6411
Abstract
This paper proposes DC offset current compensation method of transformerless fuel cell/PV PCS. DC offset current is generated by the unbalanced internal resistance of the switching devices in full bridge topology. The other cause is the sensitivity of the current sensor, which is lower than DSP in resolution. If power converter system has these causes, the AC output current in the inverter will generate the DC offset. In case of transformerless grid-connected inverter system, DC offset current is fatal to grid-side, which results in saturating grid side transformer. Several simulation results show the difficulties of detecting DC offset current. Detecting DC offset current method consists of the differential amplifiers and PWM is compensated by the output of the Op amp circuit with integrator controller. PSIM simulation verifies that the proposed method is simpler and more effective than using low resolution current sensor alone.
URI
http://hdl.handle.net/20.500.11750/4932
DOI
10.7836/kses.2013.33.6.092
Publisher
한국태양에너지학회
Related Researcher
Files:
There are no files associated with this item.
Collection:
Convergence Research Center for Future Automotive Technology1. Journal Articles
Convergence Research Center for Wellness1. Journal Articles


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