Multiple parallel‐connected DAB‐based solid‐state transformer for hybrid DC/AC microgrid system. Issue 25 (21st January 2021)

• Record Type: Journal Article
• Authors: Nalamati, Chandra Sekhar; Agrawal, Alok; Gupta, Rajesh
• Is Part Of: IET generation, transmission & distribution. Volume 14:Issue 25(2020)
• Page Start: 6359
• Page End: 6370
• Publication Date: 2021-01-21
• Subjects: DC‐AC power convertors -- power generation control -- AC‐DC power convertors -- DC‐DC power convertors -- switching convertors -- renewable energy sources -- invertors -- power transformers -- distributed power generation -- power grids -- voltage control; HMG -- MPBC‐based SST -- multiple utility feeders -- multiple redundant utility feeders -- power supply reliability issues -- MPBC‐SST converter system -- corresponding control algorithm -- grid fetching operating modes -- controller strategy -- parallel‐connected DAB‐based solid‐state transformer -- unceasing supply -- renewable energy resources -- viable technological solution -- parallel‐connected bidirectional converter topology -- solid‐state transformer power handling capability -- flexible control -- high‐frequency AC‐link power quality -- dual active bridge -- split‐step phase shift control technique -- power management control strategy -- efficient power transfer; Electric power production -- Periodicals; Electric power transmission -- Periodicals; Electric power distribution -- Periodicals; 621.3105
• DOI: 10.1049/iet-gtd.2020.0748
• Languages: English
• ISSNs: 1751-8687

Abstract

Abstract : To cater unceasing supply to the modern AC and DC loads, renewable energy resources integrated hybrid DC/AC microgrid (HMG) are considered as a viable technological solution. In this study, a multiple parallel‐connected bidirectional converter (MPBC) topology has been proposed to enhance the solid‐state transformer (SST) power handling capability with flexible control of the HMG. To improve the high‐frequency AC‐link power quality and to control the power transfer through the SST in each dual active bridge a split‐step phase shift (SSPS) control technique has been used. A power management control strategy has also been proposed for efficient power transfer between the sources and loads of the HMG. The proposed MPBC‐based SST is suitable for interconnecting multiple utility feeders. Multiple redundant utility feeders ensure stiff bus voltages and omit the power supply reliability issues. The operation of the proposed MPBC‐SST converter system with corresponding control algorithm is verified through the simulation results in both grid feeding and grid fetching operating modes. Furthermore, experimental results are presented to validate the performance of the proposed MPBC‐SST converter along with its proposed controller strategy.