TY - GEN
T1 - Performance Comparison of PV Inverter Systems Considering System Voltage Ratings and Installation Sites
AU - He, Jinkui
AU - Sangwongwanich, Ariya
AU - Yang, Yongheng
AU - Iannuzzo, Francesco
PY - 2021/7/21
Y1 - 2021/7/21
N2 - Currently, string photovoltaic (PV) inverters with wide DC and AC operating voltage ranges are available on the market, which can be employed for interfacing either 1000-V or 1500-V PV strings with different AC grid voltage levels (e.g., 400 V or 690 V). The selection of both the DC- and AC-side voltage levels should be carefully considered during the design phase. In this context, this paper compares the performance of PV systems using centralized string inverter solutions. The comparison is carried out by evaluating the power losses on each component (e.g., DC wire, inverter, AC filter, and transformer) of a 1.8-MW PV system considering different system voltage ratings and installation sites (mission profiles in Denmark and Sacramento, California). The evaluation results reveal that the impact of system voltage ratings on the energy yield of the PV system varies with mission profiles. Higher DC and AC voltage ratings can contribute to considerable energy loss reduction in both cases. However, in the cold climate, e.g., Denmark, the energy yield is more sensitive to the DC-bus voltage range, where the 1500-V PV system tied to a lower AC grid voltage (e.g., 400 V) can achieve higher energy yield.
AB - Currently, string photovoltaic (PV) inverters with wide DC and AC operating voltage ranges are available on the market, which can be employed for interfacing either 1000-V or 1500-V PV strings with different AC grid voltage levels (e.g., 400 V or 690 V). The selection of both the DC- and AC-side voltage levels should be carefully considered during the design phase. In this context, this paper compares the performance of PV systems using centralized string inverter solutions. The comparison is carried out by evaluating the power losses on each component (e.g., DC wire, inverter, AC filter, and transformer) of a 1.8-MW PV system considering different system voltage ratings and installation sites (mission profiles in Denmark and Sacramento, California). The evaluation results reveal that the impact of system voltage ratings on the energy yield of the PV system varies with mission profiles. Higher DC and AC voltage ratings can contribute to considerable energy loss reduction in both cases. However, in the cold climate, e.g., Denmark, the energy yield is more sensitive to the DC-bus voltage range, where the 1500-V PV system tied to a lower AC grid voltage (e.g., 400 V) can achieve higher energy yield.
KW - Mission profile
KW - Multi-level inverters
KW - Photovoltaic (PV) inverters
KW - Power loss
UR - http://www.scopus.com/inward/record.url?scp=85115681181&partnerID=8YFLogxK
U2 - 10.1109/APEC42165.2021.9487456
DO - 10.1109/APEC42165.2021.9487456
M3 - Article in proceeding
SN - 978-1-7281-8950-5
T3 - IEEE Applied Power Electronics Conference and Exposition (APEC)
SP - 2620
EP - 2625
BT - 2021 IEEE Applied Power Electronics Conference and Exposition (APEC)
PB - IEEE Press
Y2 - 14 June 2021 through 17 June 2021
ER -