http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
태양광 PV 어레이에서 병렬 부정합을 저감시키는 모듈 부정합 보상기법
박기엽(Gi-Yob Park),안희욱(Hee-Wook Ahn) 전력전자학회 2010 전력전자학술대회 논문집 Vol.2010 No.7
The power loss due to PV module mismatch in PV array system is analyzed and a mismatch compensation method is proposed. A dc-dc converter is used to compensate for series mismatch caused by a low current module in a string. The converter is controlled to maximize the array power output. The proposed compensation method was verified by PSpice simulation.
박기엽(Gi-Yob Park),안희욱(Hee-Wook Ahn) 전력전자학회 2009 전력전자학술대회 논문집 Vol.2009 No.2
Mismatch of electrical characteristics of modules in PV string invokes mismatch power loss. The mismatch occurs due to various causes such as shadow, aging, contamination, and module exchange. The concept of mismatch compensation converter(MCC) is presented in this paper to remedy the mismatch loss problem. MCC is connected to irregular modules only. MCC is composed of dc-dc converter and MPPT controller. It is noted that MPPT algorithm is employed to control MCC and is effective for maximum power available from irregular modules. The selection guide of MPPT control period is given based on the period of MPPT in PCU. The effectiveness of the MCC is verified by a prototype experiment.
태양광 모듈의 전압 및 전류 파형을 이용한 부정합 진단 기법
안희욱(Ahn Hee-Wook),박기엽(Park Gi-Yob) 한국태양에너지학회 2011 한국태양에너지학회 논문집 Vol.31 No.3
Techniques for mismatch loss minimization to increase the PV system efficiency are under development recently. In this paper, a method to make diagnosis of PV module mismatch is presented, which uses a concept of operating point factor. The method is based on the fact that the ratio of the incremental conductance of a PV module to instantaneous conductance is 1 when the module is operating at its maximum power point. The variations of module voltage and current are taking place by the maximum power point tracker in the power conditioning units of PV system. The effectiveness of the method is verified through an application to a real PV system.
태양광 시스템의 부정합 손실 저감을 위한 모듈 전류 보상 기법
안희욱(Ahn Hee-Wook),박기엽(Park Gi-Yob) 한국태양에너지학회 2012 한국태양에너지학회 논문집 Vol.32 No.3
A current compensation method to reduce the mismatch loss in PV systems is proposed as a way to increase the power generation efficiency. A de-de converter is used to supply currents to irregular modules in a PV string and is powered from the string output. The converter's voltage conversion ratio is adjusted so that all the modules in the string arc operated at the maximum power point. The power rating and size of the converter can be reduced since only the current difference between the regular and irregular module may be supplied. The compensated string shows very little voltage mismatch compared to other regular strings. The validity of the proposed method is verified through a simulation and experiments in a prototype PV system.