Open AccessResearch on Parallel Control Technology of Three-phase Inverter Based on Multiple Proportional Resonance Controller
Author(s) -
Wei Zhou,
XU Xiao-li,
Tan Si-yun,
Lukai Mao,
Mengqiang An,
Chenhu Luo
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1549/5/052129
Subject(s) - inverter , uninterruptible power supply , control theory (sociology) , controller (irrigation) , computer science , control system , matlab , inner loop , fault (geology) , power (physics) , voltage , engineering , control (management) , electrical engineering , physics , agronomy , quantum mechanics , artificial intelligence , seismology , geology , biology , operating system
The parallel operation of multiple inverters can increase the fault tolerance of the system and prevent the occurrence of major accidents. At the same time, it also has strong flexibility, which can reduce the volume and weight of the system and increase the capacity of the system, which is very attractive in the application of uninterruptible power supply. In the inverter parallel system, the circulation will be generated between the inverters due to the existence of the path. Circulation can cause current distortion, reduce system performance, and even damage equipment in severe cases. In order to effectively suppress the generation of circulation, this paper proposes a multiple proportional resonance control strategy for the parallel three-phase inverter system, that is, the voltage outer loop is controlled by PI+PR, and the current inner loop is controlled by PR. Two three-phase inverter parallel systems are built in MATLAB/Simulink simulation environment to compare and analyze the control effect of uncontrolled, traditional PI control and multiple PR control. The simulation results show that the proposed control method has a good suppression effect on the circulation generated in the inverter parallel system, even under the condition of unbalanced load.