Hsu H.-CChung N.-TYAOW-MING CHENHsu C.-C.2023-06-092023-06-092021https://www.scopus.com/inward/record.uri?eid=2-s2.0-85124901416&doi=10.1109%2fIFEEC53238.2021.9661897&partnerID=40&md5=4a03782679f1b84fec331895cf57ce65https://scholars.lib.ntu.edu.tw/handle/123456789/632269A grid voltage balancing strategy for three-phase four-wire systems is proposed in this paper. Unbalanced voltage is an inevitable issue at the point-of-common coupling (PCC),bringing problems to electrical loads and distribution systems. Unbalanced loads,asymmetric grid impedance,and grid faults are the main reasons for voltage imbalance. In this paper,the proposed strategy provides a new way to analyze and mitigate voltage imbalance by a per-phase-controlled inverter. Once the voltage imbalance is detected,the original PCC voltage without the inverter current of each phase is first derived. After gathering three-phase information and considering the current limitation of the inverter,balancing voltage targets and current references are generated. Simulation results show the feasibility of this voltage balancing strategy. © 2021 IEEE.grid-tied inverter; per-phase control; point-of-common coupling; three-phase four-wire; unbalanced voltage[SDGs]SDG7Electric fault currents; Balancing strategy; Grid voltage; Grid-tied inverte; Per-phase control; Phase-Control; Point of common coupling; Three phases four wires; Unbalanced voltages; Voltage balancing; Voltage imbalance; Electric invertersconference paper10.1109/IFEEC53238.2021.96618972-s2.0-85124901416