Results 211 to 220 of about 405 (259)
Some of the next articles are maybe not open access.
Modelling of high power mechanical DC circuit breaker
2015 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC), 2015This paper presents the EMTP modelling of mechanical DC CB for transmission applications. Modelling structure of a mechanical DC CB is firstly presented with all the main components included. A theoretical background for dimensioning main components is provided.
Weixing Lin +3 more
openaire +1 more source
Adaptive reclosing strategy for the mechanical DC circuit breaker in VSC-HVDC grid
Electric Power Systems Research, 2021Abstract The overhead line has wide application prospect in the future VSC HVDC grid. However, compared with the dc cable, the fault probability (especially the nonpermanent fault), is much higher on the overhead line. To enhance the system power supply reliability, effective reclosing strategy must be configured for the DCCBs. The existing automatic
Bin Li +7 more
openaire +1 more source
Mechanical arcless dc circuit breaker by current zero operation
Review of Scientific Instruments, 1992A mechanical arcless dc circuit breaker is proposed and has been constructed. A rectifying device is used to block the reverse current of the breaker, allowing the breaker to open under zero current condition created by the discharge of a commutation circuit.
S. Yamaguchi +4 more
openaire +1 more source
Investigations on Electromagnetic Operating Mechanism of DC Vacuum Circuit Breaker
2018 IEEE 3rd Advanced Information Technology, Electronic and Automation Control Conference (IAEAC), 2018Breaking capacity of DC circuit breaker is one of the important technical indicator, breaking performance of operating mechanism restricting its development. DC vacuum circuit breaker based on the principle of force zero-cross in electric power system, short-circuit current can be effectively breaking circuit.
Deshi Liang +5 more
openaire +1 more source
A mechanical arcless dc circuit breaker for a superconducting magnet system
Fusion Engineering and Design, 1993Abstract Next fusion research experiments plan to use many superconducting magnets. When a quench phenomenon is observed, the current should be interrupted to protect the magnet. Therefore, a dc circuit breaker is necessary. There are four technical situations to be considered for the dc circuit breaker system; (1) high rated current, (2) smaller ...
S. Yamaguchi +3 more
openaire +1 more source
A Fast Mechanical Switch for Medium-Voltage Hybrid DC and AC Circuit Breakers
IEEE Transactions on Industry Applications, 2015This paper presents the design and experimental results of a Thomson coil-based fast mechanical switch for hybrid ac and dc circuit breakers rated at 30-kV voltage and 630-A current. The compact design with optimized circuit parameters and geometric dimensions of components targets 2-mm travel within 1 ms when driven by a 2-mF capacitor bank precharged
Chang Peng +4 more
openaire +1 more source
Protection of full bridge MMC DC grid employing mechanical DC circuit breakers
2017 IEEE Power & Energy Society General Meeting, 2017This article studies the protection of DC grid based on full bridge (FB) MMC and mechanical DC circuit breakers. A four terminal DC grid cropped from the CIGRE B4 DC grid test system is used as the studied system. Three level cascaded controllers are installed at each FB MMC, along with central DC grid dispatcher.
Weixing Lin +3 more
openaire +1 more source
Transient Current Interruption Characteristics of a Novel Mechanical DC Circuit Breaker
IEEE Transactions on Power Electronics, 2018With the rapid development of multiterminal direct current (MTDC) grids, high-voltage direct current circuit breakers (HV-DCCB) capable of interrupting currents within 5 ms are in urgent demand. The mechanical DCCB has always been one of the main proposals for HV-DCCBs.
Weijie Wen +5 more
openaire +1 more source
Investigation of a Mechanical Switch within a Hybrid Circuit Breaker for Protection in DC Grids
2020 IEEE 66th Holm Conference on Electrical Contacts and Intensive Course (HLM), 2020Transmission and distribution of electrical energy has been achieved by using alternating current (AC) almost exclusively until now. Direct current (DC) pushes forward into long range energy transmission, server farms, mobility and manufacturing systems, being former AC dominated areas.
Lars Claasen +3 more
openaire +1 more source
IEEE Transactions on Applied Superconductivity, 2009
This paper describes the feasibility studies of a hybrid dc circuit breaker (CB) for quench protection of superconducting magnets rated for current up to some tens of kiloamperes (kA) and voltage of several kilovolts (kV). The proposed scheme is based on a mechanical switch paralleled to a fully controlled static CB; integrated gate commutated ...
Novello L, Gaio E, Piovan R
openaire +1 more source
This paper describes the feasibility studies of a hybrid dc circuit breaker (CB) for quench protection of superconducting magnets rated for current up to some tens of kiloamperes (kA) and voltage of several kilovolts (kV). The proposed scheme is based on a mechanical switch paralleled to a fully controlled static CB; integrated gate commutated ...
Novello L, Gaio E, Piovan R
openaire +1 more source