Mobile QR Code QR CODE : The Korean Institute of Power Electronics
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
Page pp.294-297
ISSN 1229-2214
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.