An Average Current Control Method in Multiphase Interleaved Bidirectional DC/DC Converter Connected on DC Microgrids
Arifin Wibisono, Mochammad Facta, Iwan Setiawan
Abstract
The main objective of this paper is to present analytical and practical digital implementation of average current control methods with DSCs (Digital Signal Controllers) in multiphase interleaved bidirectional DC/DC converter topologies connected on DC Microgrids. The bidirectional DC-DC converter has a significant role in DC Microgrids as a charge and discharges controller interfacing the ESS(Energy Storage System) both of islanding and grid-tied mode. In this work, the average current control algorithms code, embedded and developed by low-cost 16-bit DSCs. A Bilinear Transformation is needed in this form to generate a discrete model. The average current control method with a closed loop proportional-integral algorithm gives results in a more stable control from noise, does not require slope compensation, and does not cause an error in the peak current value to the average current value. The use of multiphase interleaved topologies can minimize and reduce a current ripple. By controlling the current on the DC-DC Converter, will impact the power flow during the charge-discharge process and improve the efficiency of the DC Microgrids system. The analysis, modeling, simulation, hardware implementation, and laboratory verification show that this strategy can control the current and provide better performance.