| Title |
Small-Signal Modeling and Controller Design of Grid-Connected Inverter for Solid State Transformer |
| Authors |
김보경(Kim, Bo-Gyeong) ; 이준영(Lee, Jun-Young) ; Lee, Soon-Sinl(Lee, Soon-Sinl) ; 정지훈(Jung, Jee-Hoon) |
| DOI |
https://doi.org/10.5370/KIEE.2017.66.1.40 |
| Keywords |
Grid-connected inverter ; Small-signal modeling ; Controller design ; Solid state transformer |
| Abstract |
In this paper, a small signal model for grid-connected inverter with unipolar pulse width modulation method is presented. Small-signal analysis allows to predict the stability and dynamics of the inverter. To regulate output voltage and to achieve power factor correction, inverter has two control loops. Loop gains are useful to identify the stability for multi-loop controlled system. Based on small-signal model, controllers are designed to improve audio susceptibility and output impedance characteristics. Proposed small-signal model and controllers are verified by PSIM simulation and experiments. |