Open AccessResearch on the Control Method of UPS Inverter Circuit Considering Additional Filtering Branch
Author(s) -
Guofu Liu,
Ximu Liu,
Weiwei Wang
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 - 10.1088/1742-6596/1626/1/012003
Subject(s) - inverter , uninterruptible power supply , waveform , lc circuit , rlc circuit , computer science , filter (signal processing) , power (physics) , reliability (semiconductor) , electronic engineering , control theory (sociology) , voltage , engineering , control (management) , electrical engineering , capacitor , physics , quantum mechanics , artificial intelligence
Improving the electric power quality of the Uninterruptible Power Supply (UPS) is an important part of ensuring the reliability of the power system. In order to optimize the output voltage waveform of the UPS, a filtering branch can be added to the existing UPS inverter circuit. This paper studies the circuit control problem after adding the RLC filter branch in the UPS inverter circuit. Through the analysis of the inverter circuit directly considering the added filtering branch, the system state function of the circuit is constructed. A double closed-loop PI control strategy is designed to control the inverter circuit, and the effectiveness of the method is verified by simulation. Using the method in this paper, the output of the inverter circuit with the added filter branch can reach a stable state quickly. The research conclusions of this paper are helpful to improve the output power quality of UPS.