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결정질 태양전지 모듈의 개선된 Connection Method
지양근(Ji Yang Geun),공지현(Kong Ji-Hyun),강기환(Kang Gi-Hwan),유권종(Yu Gwon-Jong),안형근(Ahn Hyung-Geun),한득영(Han Deuk-Young) 한국태양에너지학회 2009 한국태양에너지학회 학술대회논문집 Vol.2009 No.11월
In this paper, we measurement the resistance on the flat wire for PV module. There is some kind of flat wire that has different length and different contact area in the PV module. so we test the resistance on each case for analysis with common connection method. we measurement the electrical output characteristics and phenomenon of PV module that is applied new connetion method. by the result, The fill factor and electrical output characteristics on PV module are analyzed to getting better more then common connection method. Finally we recommend the developed connection method for diminishing of resistance on PV module. It enhance the electrical character more than common connection method.
Fill Factor에 따른 PV 모듈의 bypass diode의 동작 분석
지양근(Ji Yang-Geun),공지현(Kong Ji-Hyun),강기환(Kang Gi-Hwan),유권종(Yu Gwon-Jong),안형근(Ahn Hyung-Geun),한득영(Han Deuk-Young) 한국태양에너지학회 2010 한국태양에너지학회 학술대회논문집 Vol.2010 No.11
Previous studies have been focused on the voltage of bypass diode and Isc(Short Circuit Current) of the influenced solar cell. The bypass diode starts working when it gets the reversed applied voltage. Previous studies have only concentrated on Isc of the influenced solar cell and Imp of PV module to explain the bypassing performance. However, usually the PV module and inverter are installed together. The inverter has the MPPT(Maximum Power Point Tracking) function for best performance. We can expect the bypassing point is regulated by MPPT function of inverter. We already complete the analysis about the relationship between internal structure of PV module and bypassing point. but we just used ideal solar cell. so, we need to apply real solar cell. In this paper we show the simulation results for bypass diode in PV module with different Fill Factor. We experiment the relationship of the bypassing point and the Fill Factor of PV module. As the result, the more high Fill Factor cells were used, the earlier bypassing performance happens. Vmp is greater, with 68% Fill Factor.
결정질 PV 모듈의 string 구성에 따른 바이패스 다이오드 동작 분석
지양근(Yang-Geun Ji),공지현(Ji-Hyun kong),강기환(Gi-Hwan Kang),유권종(Gwon-Jong Yu),안형근(Hyung-gun Ahn),한득영(Deuk-Young Han) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
Previous studies have been focused on the voltage of bypass diode and Isc(Short Circuit Current) of the influenced solar cell. The bypass diode starts working when it gets the reversed applied voltage. Previous studies have only concentrated on Isc of the influenced solar cell and Imp of PV module to explain the bypassing performance. However, usually the PV module and inverter are installed together. The inverter has the MPPT(Maximum Power Point Tracking) function for best performance. We can expect the bypassing point is regulated by MPPT function of inverter. In this paper we show the simulation results for bypass diode in PV module. We also analyzed the relationship of the bypassing point and the composition of PV module. As the result, the more cells were connected with each string, the earlier bypassing performance happens with the fixed number of strings. As diode groups increase, the bypassing performance is also faster. This effect is greater, compared to cell number change.
결정질 PV 모듈의 string 구성에 따른 바이패스 다이오드 동작 특성
지양근(Yang-Geun Ji),공지현(Ji-Hyun kong),강기환(Gi-Hwan Kang),유권종(Gwon-Jong Yu),안형근(Hyung-gun Ahn),한득영(Deuk-Young Han) 대한전기학회 2010 전기학회논문지 Vol.59 No.12
Previous studies have been focused on the voltage of Bypass diode and Isc(Short Circuit Current) of the influenced solar cell. The Bypass diode starts working when it gets the reverse applied voltage. Previous studies have only concentrated on Isc of the influenced solar cell and Imp of PV module to explain the bypassing performance. PV module is usually working together with inverter having MPPT(Maximum Power Point Tracking) function for best performance. bypassing point is regulated by MPPT function of inverter. In this paper, simulation results of Bypass diode in PV module have been analyzed to represent the relationship of the bypassing point with the composition of PV module. From the results, the more cells are connected with each string, the earlier bypassing performance happens under the fixed number of strings. As diode groups increase or irradiation decreases, the bypassing performance starts fast.
결정질 태양전지 모듈 내부 저항의 Missmatch 분석
지양근(Ji Yang-Geun),공지현(Kong Ji-Hyun),강기환(Kang Gi-Hwan),유권종(Yu Gwon-Jong),원창섭(Won Chang-Sub),안형근(Ahn Hyung-Geun),한득영(Han Deuk-Young) 한국태양에너지학회 2009 한국태양에너지학회 학술대회논문집 Vol.2009 No.11월
In this paper, we test the electrical resistance of flat wire in the PV module. normally solar cell has two kind of flat wire(inter connection ribbon and bus bar ribbon). we found the phenomenon that has a unbalance with resistance when we make a wiling between of string. So, we measurement the resistance of flat wire each other. and analysis of missmatch with resistance between flat wires on PV module. next to survey of IR picture on missmatch flat wire samples for analyze of missmatch with current in the wire. and we perform IR test with solar cell that has a connection with flat wire for test the effect of missmatch resistance on solar cell. Finally we perform the Dark I-V test for survey of effect by the unbalance of resistance. By the result of Dark I-V test, the series resistance of existing connection sample is large more then innovated connection sample.
지양근(Yang-Geun Ji),공지현(Ji-Hyun Kong),강기환(Gi-Hwan Kang),김경수(Kyung-Su Kim),유권종(Gwon-Jong Yu),정태희(Tea-Hee Jung),신준오(Jun-Oh Shin),김태범(Tea-Bum Kim),안형근(Hyung-gun Ahn),한득영(Deuk-Young Han) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
현재 양산중인 태양전지모듈의 효율은 일반적으로 태양전지보다 2~3% 낮은 상황이다. 이것은 태양전지모듈의 구성 부품 및 공정기술 등 여러가지 요인에 의한 것으로 태양전지 모듈의 고 효율화를 위해서는 이러한 요소에 대한 분석이 필요하다. 본 논문에서는 태양전지 모듈 구성 부품 중 PV-ribbon이 태양전지모듈에 적용되는 과정에서 발생하는 저항에 대한 분석을 통해 PV-ribbon의 저항이 모듈 효율에 미치는 영향을 실험을 통해 검토하고자 하였다.
Simulation을 통한 Si-PV 모듈내의 저항 Mismatch분석
지양근(Ji Yang-Geun),공지현(Kong Ji-Hyun),강기환(Kang Gi-Hwan),유권종(Yu Gwon-Jong),안형근(Ahn Hyung-Geun),한득영(Han Deuk-Young) 한국태양에너지학회 2010 한국태양에너지학회 학술대회논문집 Vol.2010 No.4
In this paper, we study the electrical resistance on the flat wire by simulation software(OrCAD, Ansys). normally solar cell has two kind of flat wire(inter connection ribbon and bus bar ribbon). we found the phenomenon that has a unbalance with resistance when we make a wiring between of string. So, we simulate the resistance of flat wire and resistance of mismatch with resistance between flat wires on PV module. next to simulate the stream of electron on PV module by ANSYS. As a result mismatch of resistance with the flat wire on the solar cell. it is cause of drop of output, and It is responsible of mismatch of temperature on solar cell.
기계적 스트레스가 태양전지모듈의 전기적 출력에 미치는 영향
공지현(Ji-Hyun Kong),지양근(Yang-Geun Ji),강기환(Gi-Hwan Kang),김경수(Kyung-Su Kim),정태희(Tae-Hee Jung),신준오(Jun-Oh Shin),김태범(Tae-Bum Kim),유권종(Gwon-Jong Yu),안형근(Hyung-Guen Ahn),한득영(Deuk-Young Han) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
태양전지모듈에 물리적 하중이 가해지면 전면유리의 연신율에 따라 모듈이 휘어지게 되고 이에 따라 내부에 열 봉합되어 있는 태양전지에 미세한 균열이 발생한다. 이 균열이 태양전지모듈의 단락전류 및 개방전압의 출력을 떨어뜨리는데 이는 균열로 인한 저항성분의 증가로 인한 것이다. 모듈내의 특정한 셀에서 미세균열(Micro-crack)의 발생은 출력의 저하, 셀 출력 Mismatch로 인한 모듈 내의 Hot-Spot발생, 균열로 인한 저항성분으로서의 열 발생과 같은 전체 태양전지모듈의 내구성을 저하시키는 요소로 작용한다. 본 연구에서는 결정질 태양전지 모듈의 출력에 영향을 미치는 요소 가운데 기계적 스트레스에 의한 미세균열(Micro-crack)이 전기적 출력에 미치는 영향에 대해 본 논문에서 알아보고자 한다.
공지현(Kong Ji-Hyun),지양근(Ji Yang-Guen),강기환(Kang Gi-Hwan),유권종(Yu Gwon-Jong),안형근(Ahn Hyung-Geun),한득영(Han Deuk-Young) 한국태양에너지학회 2010 한국태양에너지학회 학술대회논문집 Vol.2010 No.11
In this paper, When PV module be exposed to outdoor, changes of transmittance and initial Pout were experimented and analysed. Typically, PV modules show the tendency to decreasing Pout in early. It is characteristics of boron doped p-type semiconductor using base of silicon crystalline solar cell. To investigate initial output characteristics of PV module we experiment and analyse about front materials of PV module. Thus the output of PV modules were observed. Transmittance changes observed in the initial value compared to the initial reduction of the maximum was -6.39% compared to the output changes as early as the second polycrystalline modules -2.5%, singlecrystalline modules decreased -1.97%. This paper we discuss the initial characteristics of PV module according to natural illuminations and analyse between transmittance of front materials and Pout of PV module.
기계적 하중에 따른 스트레스로 인한 PV 모듈의 전기적 특성
공지현(Kong Ji-Hyun),지양근(Ji Yang-Geun),강기환(Kang Gi-Hwan),유권종(Yu Gwon-Jong),안형근(Ahn Hyung-Geun),한득영(Han Deuk-Young) 한국태양에너지학회 2009 한국태양에너지학회 학술대회논문집 Vol.2009 No.11월
If the Photovoltaic(PV) Module should get physical load, the PV module will be warped according to elongation of the front glass and then micro-crack will be occurred in the heat sealed Solar Cell. This micro-crack drops output of the short circuit current and the open circuit voltage of the PV Module. This is because of increase of resistance component by micro-crack. Micro-crack at specific Solar Cell in the module reduces the durability of PV Module such as less output, Hot-Spot in the PV module caused by Solar Cell output mismatch, heat generating as resistance component caused by micro-crack. In this study, among some factors which effect to the output of crystalline PV Module, we will see how the micro-crack caused by mechanical stress effects to the electrical output of PV Module.