Anshuman Shukla

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This paper proposes a flying-capacitor-based chopper circuit for dc capacitor voltage equalization in diode-clamped multilevel inverters. Its important features are reduced voltage stress across the chopper switches, possible reduction in the chopper switching frequency, improved reliability, and ride-through capability enhancement. This topology is(More)
Flying capacitor multilevel inverter (FCMLI) is a multiple voltage level inverter topology intended for high voltage and power operations with low distortion. It uses capacitors, called flying capacitors for clamping the voltage across the power semiconductor devices. In this paper, the implementation of a distribution static compensator (DSTATCOM) using an(More)
Proposed here is an alternate Five-level four-quadrant cascaded multilevel converter cell configuration that compared to the other cell configurations, for dc fault current limitation, will be more compact and avoid the external dc breaker. Loss comparison on cells with dc fault blocking capability for the cascaded converter is also presented.
The fault-tolerant multilevel converters are gaining increased interests for high-voltage direct current (HVDC) applications due to their ability to suppress the fault current during dc-side faults. However, most of these topologies use full-bridge submodules (FBSMs) resulting in the requirement of a large number of semiconductor switches. In this paper, a(More)
This paper provides an overview of DC side fault tolerance issues of VSC based HVDC system and the need for fault tolerant converters. The working principle and DC fault ride through capability of recently introduced Alternate Arm Modular Multilevel Converter(AAMMC) has been discussed. The capacitor voltage balancing issues of AAMMC is analyzed and a novel(More)
Current source modular multilevel converters (CSMMCs) in high-power applications can consist of large number of submodules. Simulations of such systems using full-size traditional detailed model in electromagnetic transient-type (EMT-type) simulation tools involve computational complexity and require very large computing time. This paper presents a(More)
Isolated dc-dc converters are increasingly being used in many industrial and utility applications such as shipboard, hybrid and electric vehicles, microgrids, etc., for integrating the dc sources and storage devices. A modified dual transformer based asymmetrical dual bridged isolated dc-dc (MDT-ADB) converter is proposed in this paper. MDT-ADB consists of(More)
The simulation of current source modular multilevel converter (CSMMC) based systems with large number of submodules require significant computational efforts. In this paper, a simplified model of CSMMC is developed to reduce the computational complexity while maintaining the accuracy of the traditional detailed model. The model is constituted using(More)