Yang, C.-J.C.-J.YangTsai, T.-W.T.-W.TsaiLi, Y.-C.Y.-C.LiTang, C.-Y.C.-Y.TangChen, Y.-M.Y.-M.ChenChang, Y.-R.Y.-R.ChangYAOW-MING CHEN2020-06-112020-06-112018https://scholars.lib.ntu.edu.tw/handle/123456789/501264For a micro-grid system, the increasing distributed generations and unbalanced loads may easily cause unbalanced grid voltages and reduce the power system stability. Therefore, a smart photovoltaic (PV) inverter capable of transferring demanded unbalanced power of each phase will be needed to help to increase the stability and power quality of the micro-grid system. To address these issues, this paper proposed a per-phase current control strategy for the PV power system. With the proposed control strategy, the output current and power of each phase can be directly controlled and determined by the user according to the load requirement. It is worth mentioning that complex dq-axis transformations and extra circuits or components are not needed. The thorough mathematical derivations and operation principles will be present in this paper. Also, a 5kVA prototype circuit is implemented to help to demonstrate the feasibility of the proposed control strategy. © 2018 IEEJ Industry Application Society.Micro-grid; Per-phase control; PV inverter; Unbalanced[SDGs]SDG7Electric inverters; Electric power system stability; Electric power transmission networks; Power electronics; Mathematical derivation; Micro grid; Per-phase controls; Photovoltaic inverters; PV inverter; Smart grid applications; Unbalanced; Unbalanced grid voltages; Smart power gridsconference paper10.23919/IPEC.2018.85073902-s2.0-85057306566https://www.scopus.com/inward/record.uri?eid=2-s2.0-85057306566&doi=10.23919%2fIPEC.2018.8507390&partnerID=40&md5=2c97d45325df1198f9a7c087de7c42a7