A comprehensive harmonic analysis and control strategy for improved input power quality in a cascaded modular solid state transformer

NBY Gorla, S Kolluri, M Chai… - IEEE Transactions on …, 2018 - ieeexplore.ieee.org
In a three-stage cascaded modular solid state transformer (CMSST), unbalanced dc bus
voltages at the output of cascaded multilevel rectifier is a common issue due to inevitable …

A novel open-circuit fault detection and localization scheme for cascaded H-bridge stage of a three-stage solid-state transformer

NBY Gorla, S Kolluri, M Chai… - IEEE Transactions on …, 2019 - ieeexplore.ieee.org
A three-stage solid-state transformer (SST) is a preferred replacement for line frequency
transformer as it provides ancillary services in addition to stepping-up/down of grid voltages …

Solid-state transformers: Fundamentals, topologies, applications, and future challenges

S Khan, K Rahman, M Tariq, S Hameed, B Alamri… - Sustainability, 2021 - mdpi.com
Solid-state transformers (SSTs) have emerged as a superior alternative to conventional
transformers and are regarded as the building block of the future smart grid. They …

Energization and start-up of CHB-based modular three-stage solid-state transformers

M Saeed, JM Cuartas, A Rodríguez… - IEEE Transactions on …, 2018 - ieeexplore.ieee.org
This paper discusses the energization and start-up process of modular three-stage solid-
state transformers (SSTs) based on a cascaded H-bridge topology. A key element of the SST …

An open-circuit fault detection and localization scheme for cascaded H-bridge multilevel converter without additional sensors

NBY Gorla, S Kolluri, M Chai… - IEEE Transactions on …, 2021 - ieeexplore.ieee.org
In this article, a new model-based fault detection and localization scheme is proposed for
cascaded H-bridge (CHB) multilevel converter to localize the open-circuit faults without …

Efficiency Enhancement of DC Solid State Transformers by Dynamically Adjusting Active Cells

H Weng, Y Jiang, M Chen, C Hu… - IEEE Transactions on …, 2023 - ieeexplore.ieee.org
A dc solid-state transformer (DCSST) is a key building block for future medium-voltage dc
systems, and its efficiency is important to the entire system. High-voltage semiconductor …

Voltage and power balance strategy without communication for a modular solid state transformer based on adaptive droop control

WA Rodrigues, TR Oliveira, LMF Morais, AHR Rosa - Energies, 2018 - mdpi.com
Solid State Transformers (SST) are attracting considerable attention due to their great
application potential in future smart grids. It is an essential technology capable of promoting …

A new model-based fault detection and localization scheme for cascaded H-bridge multilevel converter

NBY Gorla, S Kolluri, M Chai… - 2020 IEEE Energy …, 2020 - ieeexplore.ieee.org
In this paper, a new model-based fault detection and localization algorithm is proposed for
cascaded H-bridge (CHB) multilevel converter to localize the open-circuit faults without the …

Operation of Cascaded H-bridge-Based Split-Battery Energy Storage System With Reduced Sensors

NBY Gorla, GG Farivar, G Liang… - 2021 IEEE 12th …, 2021 - ieeexplore.ieee.org
In the conventional cascaded H-bridge-based splitbattery energy storage (CHB-SBES)
system, the dc-bus voltages are measured for state-of-charge (SoC) balancing and …

Fault Tolerance Scheme for a DC Solid State Transformer

H Weng, J Li, D Xu - 2020 IEEE 9th International Power …, 2020 - ieeexplore.ieee.org
This paper discusses the fault tolerance scheme of a DC Solid State Transformer (DC-SST)
with cascaded conversion cells. Each cell is composed of a full bridge DC-DC converter and …