TY - GEN
T1 - Enhanced Reliability of 1500-V Photovoltaic Inverters with Junction Temperature Limit Control
AU - He, Jinkui
AU - Sangwongwanich, Ariya
AU - Yang, Yongheng
AU - Iannuzzo, Francesco
PY - 2021/7/13
Y1 - 2021/7/13
N2 - This paper investigates the potential to enhance the reliability of 1500-V single-stage photovoltaic (PV) inverters with a junction temperature control strategy, where PV inverters can operate either in the maximum power point tracking mode or a junction temperature limit control mode depending on the thermal stress on the inverter power devices. With this, the junction temperature of the power devices in the PV inverter can be kept below a certain limit during operation. The effectiveness (i.e., reliability enhancement) of the proposed junction temperature control on the PV inverter reliability is demonstrated on a 60-kW three-level 1500-V PV inverter installed in Denmark. Case study results indicate that the proposed control has a high ability to enhance the inverter reliability, where the lifetime of the highest stressed power device can be extended to a large extent, while incurring a negligible reduction in energy yield.
AB - This paper investigates the potential to enhance the reliability of 1500-V single-stage photovoltaic (PV) inverters with a junction temperature control strategy, where PV inverters can operate either in the maximum power point tracking mode or a junction temperature limit control mode depending on the thermal stress on the inverter power devices. With this, the junction temperature of the power devices in the PV inverter can be kept below a certain limit during operation. The effectiveness (i.e., reliability enhancement) of the proposed junction temperature control on the PV inverter reliability is demonstrated on a 60-kW three-level 1500-V PV inverter installed in Denmark. Case study results indicate that the proposed control has a high ability to enhance the inverter reliability, where the lifetime of the highest stressed power device can be extended to a large extent, while incurring a negligible reduction in energy yield.
KW - Photovoltaic (PV) inverters
KW - lifetime
KW - maximum power point tracking (MPPT)
KW - reliability
UR - http://www.scopus.com/inward/record.url?scp=85114204978&partnerID=8YFLogxK
U2 - 10.1109/ECCE-Asia49820.2021.9479356
DO - 10.1109/ECCE-Asia49820.2021.9479356
M3 - Article in proceeding
SN - 978-1-7281-6345-1
SP - 243
EP - 249
BT - 2021 IEEE 12th Energy Conversion Congress & Exposition - Asia (ECCE-Asia)
PB - IEEE Press
T2 - 12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020
Y2 - 11 October 2020 through 15 October 2020
ER -