Results 41 to 50 of about 1,134,965 (196)

An adaptive reclosing strategy for MMC-HVDC systems with hybrid DC circuit breakers [PDF]

open access: yes, 2019
Modular multilevel converter (MMC) based high voltage direct current transmission (HVDC) is an effective solution for large-scale renewable power integration over long-distance. In the overhead MMC-HVDC systems, the high voltage DC circuit breakers (DCCB)
Yang, Saizhao   +4 more
core   +2 more sources

An economical hybrid DC circuit breaker with pre-current-limiting capability

open access: yesEnergy Reports, 2023
Multi-terminal flexible high-voltage-direct-current (HVDC) transmission and DC grid technology are developing rapidly, and the hybrid DC circuit breaker (DCCB) is usually used to protect the DC system, which can quickly remove the fault current and make ...
Guanlong Jia   +4 more
doaj   +1 more source

Energy and Load Curtailment Based Indices in Probabilistic Transient Stability Studies

open access: yesJournal of King Saud University: Engineering Sciences, 1997
In this paper, stochastic models for both simultaneous and adaptive reclosing are presented and examined using a new set of probabilistic transient stability risk indices. The developed indices are based on load curtailments resulting from bus isolations
Roy Billinton, Saleh Aboreshaid
doaj   +1 more source

An Adaptive Reclosing Strategy for MMC-HVDC Systems With Hybrid DC Circuit Breakers [PDF]

open access: yesIEEE Transactions on Power Delivery, 2020
Modular multilevel converter (MMC) based high voltage direct current transmission (HVDC) is an effective solution for large-scale renewable power integration over long-distance. In the overhead MMC-HVDC systems, the high voltage DC circuit breakers (DCCB) are implemented to interrupt the DC fault current.
Saizhao Yang   +4 more
openaire   +3 more sources

Setting Free Fault Location for Three-Terminal Hybrid Transmission Lines Connected With Conventional and Renewable Resources

open access: yesIEEE Access, 2023
Three-terminal hybrid transmission lines (TTHTLs) are attractive from both environmental and commercial view. Hybrid transmission lines are growing due to urbanization, connecting an industrial load and renewable integration.
Kukkala Likhitha, O. D. Naidu
doaj   +1 more source

Permanent fault identification for distribution network based on characteristic frequency signal injection using power electronic technology

open access: yesFrontiers in Energy Research, 2022
In order to identify the fault nature when phase-to-phase short circuit fault occurs in distribution lines and realize adaptive reclosing of distribution lines more accurately, a fault identification scheme using an inverter-based power electronic ...
Zhihua Zhang   +5 more
doaj   +1 more source

Effect of coordination of optimal reclosing and fuzzy controlled braking resistor on transient stability during unsuccessful reclosing [PDF]

open access: yes, 2006
This paper analyzes the effect of the coordination of optimal reclosing and fuzzy logic-controlled braking resistor on the transient stability of a multimachine power system in case of an unsuccessful reclosing of circuit breakers.
Ali, Mohd.Hasan   +3 more
core   +3 more sources

TRANSIENT STABILITY IMPROVEMENT OF EHV POWER TRANSMISSIONS BY ADAPTIVE SINGLE-POLE RECLOSING [PDF]

open access: yes, 1985
Some special aspects of the stability properties of EHV power transmissions are pointed out in the introduction, followed by a more detailed analysis of the impact of single-pole short circuits and automatic reclosing.
Rácz, László
core   +1 more source

Current state of the problems of functioning of relay protection and automation complexes used in an active adaptive network

open access: yesИзвестия высших учебных заведений: Проблемы энергетики, 2023
THE PURPOSE. To analyze the influence of series compensation devices on the operating modes of power transmission lines. To identify problems of functioning of relay protection and automation complexes when they are used on power transmission lines with ...
I. Yu. Ivanov   +2 more
doaj   +1 more source

A Novel Protection Scheme of AC and DC Line-Touching Based on Coordination of AC and DC Protection

open access: yesZhongguo dianli, 2022
The AC/DC hybrid grid is developing rapidly, and the AC-DC line-touching fault has become an unique fault type. By taking different types of AC and DC line touching faults as the research object, and focusing on the whole process from fault isolation to ...
Wei TANG   +5 more
doaj   +1 more source

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