Open AccessImpedance Reshaping and Stability Analysis of the Unbalanced Three-phase System Considering the Grid-tied Inverter based Imbalance Compensation
Author(s) -
JengHua Wei,
Feng Gao,
Lu Liu
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 - 10.1088/1742-6596/2087/1/012018
Subject(s) - control theory (sociology) , compensation (psychology) , inverter , stability (learning theory) , electrical impedance , grid , computer science , transformation (genetics) , topology (electrical circuits) , electronic engineering , engineering , control (management) , mathematics , electrical engineering , psychology , biochemistry , chemistry , geometry , voltage , artificial intelligence , machine learning , psychoanalysis , gene
Grid-tied inverters have been adopted both as the interface of renewable energy resources and as a solution to address power quality issues. To compensate the imbalance distortion caused by asymmetric local load, DQ transformation based compensation method is introduced into the control scheme of the grid-tied inverter. Taking both the inverter control scheme and circuit topology into account, the space vector based impedance modelling and stability analysis approaches are proposed in this paper to analyse the dynamic of the asymmetric system with active imbalance compensation. The proposed impedance models indicate that the compensation control method can reshape the output impedance features, and affect the stability of the system. The stability analysis results are verified in this paper by experimental results.