Smart PV Inverters for Smart Grid Applications
Journal
2018 International Power Electronics Conference, IPEC-Niigata - ECCE Asia 2018
Pages
639-644
Date Issued
2018
Author(s)
Abstract
For 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.
Subjects
Micro-grid; Per-phase control; PV inverter; Unbalanced
SDGs
Other Subjects
Electric 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 grids
Type
conference paper