Results 281 to 290 of about 5,762,867 (344)

Solid-State Circuit Breaker Protection for DC Shipboard Power Systems: Breaker Design, Protection Scheme, Validation Testing

IEEE transactions on industry applications, 2020
The ultrafast protection speed requirement motivates the adoption of solid-state circuit breakers (SSCBs) for dc shipboard power systems. A 1 kV and 1.5 kA SS dc circuit breaker (DCCB) based on reverse blocking integrated gate commutated thyristor (RB ...
L. Qi, P. Cairoli, Zach Pan, Colin Tschida, Zhenyuan Wang, V. Ramanan, L. Raciti, A. Antoniazzi   +7 more
semanticscholar   +1 more source

Current-differential protective schemes

1993
It will be clear from the previous chapter that overcurrent and earth fault protective equipment employing time grading and directional detection cannot provide correct discrimination on all power networks and in many instances the clearance times for some faults would not be acceptable.
C. Christopoulos, A. Wright
openaire   +1 more source

Communication-less protection scheme for AC microgrids using hybrid tripping characteristic

, 2020
Conventional protection schemes are not effective in microgrids due to the possibility of bi-directional current flow and fault level reduction in the islanded mode caused by converter interfaced Distributed Generations (DGs).
Soham Chakraborty, Sarasij Das
semanticscholar   +1 more source

Accelerate protection scheme in integrated protection system

2011 2nd IEEE PES International Conference and Exhibition on Innovative Smart Grid Technologies, 2011
Transformer is one of the most important elements in power system, and current differential protection has been the main protection technique for transformer unit. This protection technique, however, suffers a low sensitivity or reliability due to the problems such as CT saturation and transformer magnetizing inrush. Based on digital substation system,
Hao Zhang, Jinghan He, Tony Yip, Z Q Bo
openaire   +1 more source

A New Distance Protection Scheme Based on Improved Virtual Measured Voltage

IEEE Transactions on Power Delivery, 2020
Fault resistance causes conventional distance protection to operate incorrectly, threatening the safe operation of power system. The immunity to fault resistance is improved by utilizing fault-point voltage, measured current, and setting impedance to ...
Yingyu Liang, Wulin Li, Zhengjie Lu, G. Xu, Cong Wang   +4 more
semanticscholar   +1 more source

Adaptive differential protection scheme for wind farm integrated power network

Electric power systems research, 2020
In this paper, an adaptive differential protection scheme is proposed for wind farm integrated power network. Any fixed threshold setting based protection scheme is not always suitable for the different operating conditions of power system.
C. Prasad, M. Biswal, A. Abdelaziz
semanticscholar   +1 more source

A protection scheme for hybrid multi-terminal HVDC networks utilizing a time-domain transient voltage based on fault-blocking converters

International Journal of Electrical Power & Energy Systems, 2020
Combining the advantages of the line commutated converter (LCC) and modular multilevel converter (MMC), hybrid multi-terminal HVDC (Hybrid-MTDC) systems have become the most competitive candidate for future power transmission systems.
Xinquan Chen, Haifeng Li, Yuansheng Liang, Gang Wang   +3 more
semanticscholar   +1 more source

Adaptive protection scheme for smart grids

12th IET International Conference on Developments in Power System Protection (DPSP 2014), 2014
The amount of distributed generation (DG) connected to distribution networks is increasing. This can cause challenges for traditional protection of distribution networks due to bidirectional power flows, fault current contribution of DG units and grid code fault-ride-through (FRT) requirements.
Voima, S., Laaksonen, H., Kauhaniemi, K.
openaire   +1 more source

Leadership scheme for child protection nurses

Nursing Management, 2004
The RCN is launching a leadership programme this month aimed at health professionals with responsibility for child protection.
Christian, Duffin, Nick, Lipley
openaire   +2 more sources

Adaptive current differential protection schemes for transmission-line protection

IEEE PES General Meeting, 2009
Throughout the history of power system protection, researchers have strived to increase sensitivity and speed of apparatus protection systems without compromising security. With the significant technological advances in wide-area measurement systems, for transmission system protection, current differential protection scheme outscores alternatives like ...
DAMBHARE, S, SOMAN, SA, CHANDORKAR, MC
openaire   +2 more sources