TY - JOUR
T1 - Three-Phase ZVR Topology and Modulation Strategy for Transformerless PV System
AU - Guo, Xiaoqiang
AU - Zhang, Xue
AU - Guan, Honglei
AU - Kerekes, Tamas
AU - Blaabjerg, Frede
PY - 2019/2
Y1 - 2019/2
N2 - Leakage current reduction is crucial for operating transformerlss PV systems. In this letter, a new three-phase topology and modulation strategy is proposed. It is derived from the single-phase ZVR (zero-voltage state rectifier) topology, but the operation mechanism is quite different. Therefore, a new modulation strategy based on the Boolean logic function is proposed to achieve the constant common mode voltage, so as to eliminate the leakage current. Finally, the experimental tests are carried out to verify the feasibility and effectiveness of the proposed solution.
AB - Leakage current reduction is crucial for operating transformerlss PV systems. In this letter, a new three-phase topology and modulation strategy is proposed. It is derived from the single-phase ZVR (zero-voltage state rectifier) topology, but the operation mechanism is quite different. Therefore, a new modulation strategy based on the Boolean logic function is proposed to achieve the constant common mode voltage, so as to eliminate the leakage current. Finally, the experimental tests are carried out to verify the feasibility and effectiveness of the proposed solution.
KW - Leakage currents
KW - transformerless PV systems
KW - Inverter
UR - http://www.scopus.com/inward/record.url?scp=85048863949&partnerID=8YFLogxK
U2 - 10.1109/TPEL.2018.2849074
DO - 10.1109/TPEL.2018.2849074
M3 - Journal article
SN - 0885-8993
VL - 34
SP - 1017
EP - 1021
JO - IEEE Transactions on Power Electronics
JF - IEEE Transactions on Power Electronics
IS - 2
M1 - 8389205
ER -