Open AccessResearch on Three-phase Unbalanced Overvoltage Suppression Method Based on Active Inverter
Author(s) -
Yibo Li,
Wensi Cao
Publication year - 2021
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 - 10.1088/1742-6596/1748/5/052027
Subject(s) - overvoltage , control theory (sociology) , inverter , three phase , phase (matter) , voltage , symmetrical components , current (fluid) , grid , reliability (semiconductor) , power (physics) , topology (electrical circuits) , engineering , computer science , electrical engineering , physics , mathematics , transformer , control (management) , geometry , quantum mechanics , artificial intelligence
A three-phase unbalanced overvoltage suppression method based on active inverter is proposed for the three-phase unbalanced voltage caused by the imbalance of three relative parameters in the power grid. According to the zero-sequence current generated by the neutral point in the three-phase unbalanced state in the system, the tracking inverter circuit is correspondingly injected with a certain magnitude and phase current to compensate the three-phase unbalanced current without changing the grid-to-ground insulation. Under the condition of parameters, the three-phase unbalanced overvoltage is quickly and accurately suppressed, and the three-phase voltage balance of the grid is forced. Due to the complex and variable structure of the distribution network, the three-phase unbalance phenomenon is particularly prominent. Therefore, the distribution network is very representative. The reliability of the proposed method is verified by simulation analysis.