Grid Voltage Balancing Strategy Based on Per-Phase-Controlled Inverters
Journal
2021 IEEE International Future Energy Electronics Conference, IFEEC 2021
Date Issued
2021
Author(s)
Abstract
A 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.
Subjects
grid-tied inverter; per-phase control; point-of-common coupling; three-phase four-wire; unbalanced voltage
SDGs
Other Subjects
Electric 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 inverters
Type
conference paper