Results 21 to 30 of about 79 (70)
International Transactions on Electrical Energy Systems, Volume 2023, Issue 1, 2023., 2023 In recent years, low‐voltage direct current (LVDC) microgrids are becoming more attractive because they represent a solution to integrate renewable sources, storage, and electronic loads bringing some advantages in comparison with traditional AC grids.
Riccardo Lazzari +2 more
wiley +1 more source
IET Renewable Power Generation, Volume 16, Issue 14, Page 3134-3148, 26 October 2022., 2022 Abstract One of the challenging issues in the realization of medium‐voltage DC (MVDC) distribution system is high‐speed protection scheme design against quickly rising short circuit fault‐DC current. This paper proposes a high‐speed protection scheme based on the processing of energy signals through mathematical morphology (MM). The voltage and current
Maqsood Ahmad Shah +7 more
wiley +1 more source
Resonant Network-Based MVDC Circuit Breaker Topologies With Fast Current Breaking Capability
IEEE Access, 2023 This paper presents two improved circuit breaker (CB) topologies based on resonant networks for medium voltage DC (MVDC) applications, such as shipboard power distribution and subsea oil and gas production.
Hussain Sayed, Harish S. Krishnamoorthy
doaj +1 more source
IET Power Electronics, Volume 15, Issue 5, Page 412-421, 8 April 2022., 2022 Abstract Phase sequence exchange (PSE) is an emerging emergency control method for power systems. However, PSE will generate impulse current and voltage. In this research, to suppress the impulse of PSE, a phase control method for zero‐current opening and equal‐voltage closing is adopted, and verified via both physics and experiments.
Yifan Li +4 more
wiley +1 more source
Novel power electronic device for power angle stability control
The Journal of Engineering, Volume 2022, Issue 4, Page 447-451, April 2022., 2022 Abstract This letter proposes a novel phase sequence exchange (PSE) device. When the generator loses synchronization and the power angle gradually increases, the primary side of the contact line is disconnected and quickly connected in a staggered phase using the power device with fast breaking characteristics.
Hui Li +3 more
wiley +1 more source
Overview of grounding schemes for solid‐state transformers in distribution networks
IET Generation, Transmission &Distribution, Volume 15, Issue 22, Page 3081-3099, November 2021., 2021 Abstract Proposed to be the critical enabling component for future distribution networks, solid‐state transformers (SSTs) have drawn much attention lately. They have a massive potential to help reduce size and weight, improve efficiency, integrate microgrids, renewables and energy storages in distribution systems, and can fulfil multiple grid functions
Jiajie Zang +3 more
wiley +1 more source
Design criteria of solid‐state circuit breaker for low‐voltage microgrids
IET Power Electronics, Volume 14, Issue 7, Page 1284-1299, 20 May 2021., 2021 Abstract Solid‐state circuit breakers (SSCB) show great promise to become the key element in the protection of low‐voltage direct current microgrids. SSCBs operate in the microsecond range and employ semi‐conductor devices that have strict safe operation area limits.
Pavel Purgat +4 more
wiley +1 more source
Design of a snubber circuit for low voltage DC solid‐state circuit breakers
IET Power Electronics, Volume 14, Issue 6, Page 1111-1120, 6 May 2021., 2021 Abstract Solid‐state circuit breakers (SSCBs) are designed to interrupt fault currents typically several orders faster than its electromechanical counterparts. However, such an ultrafast switching operation would produce a dangerous overvoltage which might cause damages to SSCBs and other circuit elements in the system.
Zhongying Wang +1 more
wiley +1 more source
Machine Learning Enabled Cluster Grouping of Varistors in Parallel-Structured DC Circuit Breakers
IEEE Open Journal of Power Electronics, 2023 This letter presents the first ever trial of machine learning enabled cluster grouping of varistors for DC circuit breakers (DCCBs). It reveals that the manufacturing discrepancy of varistors is a main challenge in their parallel connection. The proposed
Shuyan Zhao +5 more
doaj +1 more source
IET Generation, Transmission &Distribution, Volume 15, Issue 1, Page 45-55, January 2021., 2021 Abstract The high‐surety power supply systems are gaining great attention to enhance the reliability of uninterruptable power supplies. A high‐resistance fault along a high‐surety power supply feeder results in a low fault current, making the conventional high‐surety power supply protection strategy ineffective.
Roja Rouhani +2 more
wiley +1 more source