TY - GEN
T1 - Performance evaluation of single-phase transfomer-less PV inverter topologies
AU - Roy, Jinia
AU - Xia, Yinglai
AU - Ayyanar, Raja
N1 - Publisher Copyright:
© 2018 IEEE.
PY - 2018/4/18
Y1 - 2018/4/18
N2 - Double line frequency power decoupling with reduced capacitance and mitigation of leakage current are two of the major challenges of any grid-connected single phase photovoltaic (PV) inverter. This paper compares the performances of different topologies for single phase transformerless PV application in terms of the power decoupling capacitor requirement, the current ripple and total harmonic distortion (THD), efficiency performance, and leakage current. The topologies considered include a doubly grounded T-type dynamic dc-link (DDCL) inverter, a half-bridge voltage swing (HBVS) inverter, and conventional full-bridge (FB) inverter with three different modulation schemes (bipolar, hybrid, and unipolar). The leakage current arising from both parasitic capacitances of the PV module and the heat sink is considered in the present study which is essential for design of the electromagnetic interference (EMI) filters. The analysis are supported by experimental results from SiC-based 1 kW hardware prototypes operating at 120 V ac nominal output at a switching frequency of 100 kHz for each of the topology.
AB - Double line frequency power decoupling with reduced capacitance and mitigation of leakage current are two of the major challenges of any grid-connected single phase photovoltaic (PV) inverter. This paper compares the performances of different topologies for single phase transformerless PV application in terms of the power decoupling capacitor requirement, the current ripple and total harmonic distortion (THD), efficiency performance, and leakage current. The topologies considered include a doubly grounded T-type dynamic dc-link (DDCL) inverter, a half-bridge voltage swing (HBVS) inverter, and conventional full-bridge (FB) inverter with three different modulation schemes (bipolar, hybrid, and unipolar). The leakage current arising from both parasitic capacitances of the PV module and the heat sink is considered in the present study which is essential for design of the electromagnetic interference (EMI) filters. The analysis are supported by experimental results from SiC-based 1 kW hardware prototypes operating at 120 V ac nominal output at a switching frequency of 100 kHz for each of the topology.
KW - Active power decoupling
KW - Common mode voltage
KW - Heat sink leakage current
KW - PV array leakage current
KW - Parasitic capacitance
KW - THD
KW - Transformer-less PV inverter
UR - http://www.scopus.com/inward/record.url?scp=85046968868&partnerID=8YFLogxK
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U2 - 10.1109/APEC.2018.8341568
DO - 10.1109/APEC.2018.8341568
M3 - Conference contribution
AN - SCOPUS:85046968868
T3 - Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
SP - 3250
EP - 3255
BT - APEC 2018 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2018
Y2 - 4 March 2018 through 8 March 2018
ER -