| Title |
Grid Voltage Estimation Method for Modular Plug-in Active Power Decoupling Circuits |
| Authors |
Dong-Hee Kim ; Jeong-Tae Kim ; Sung-Min Park ; Gyo-Bum Chung |
| DOI |
10.6113/TKPE.2021.26.4.294 |
| Keywords |
APD (Active Power Decoupling); Grid voltage estimation; Modular plug-in APD; Renewable energy |
| Abstract |
A grid voltage estimation method for modular plug-in active power decoupling (APD) circuits is proposed in this study as direct replacements of electrolytic capacitors. Since modular plug-in APD circuits cannot have additional grid voltage sensors and should be operated independently without information exchange with the front-end converter, it is impossible to obtain the phase information of the grid directly. Therefore, the proposed method uses the second-order harmonic component of the DC-link voltage to estimate the grid voltage necessary to control the APD circuit. By employing the proposed method, the concept of modular plug-in APD circuits can be realized and implemented without direct detection of the grid voltage. The experimental results based on hardware-in-the-loop simulation (HILS) validate the effectiveness of the proposed control method. |