Results 261 to 270 of about 757,728 (303)

Over current protection methods for LLC resonant converter

Eighteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2003. APEC '03., 2004
LLC resonant converter was getting more and more attention in recent years because of its high efficiency, high frequency operation capability and simple structure. In this paper, the over current protection issue of LLC resonant converter is discussed.
B. Yang, F.C. Lee, M. Concannon
openaire   +1 more source

Study on Autotransformer’s Low Voltage Side Over-current Protection with Circulating Current

2020 IEEE 4th Conference on Energy Internet and Energy System Integration (EI2), 2020
500kV autotransformer has split type and integrated type. The current transformer (CT) position of low voltage side is different for these two types of autotransformer. This paper analyzes circulating current in autotransformer’s delta winding when single-phase grounding fault takes place on high voltage side.
Fangfang Shi, Zehui Zhang, Zeqing Zhao, Zhaohui Zhang   +3 more
openaire   +1 more source

Novel Over-Current Protection for Peak Current Regulated DC-DC Converter

IECON 2007 - 33rd Annual Conference of the IEEE Industrial Electronics Society, 2007
The change of the over-current protection point of the power switches, caused by slope compensation, is analyzed in detail. It is discovered that the peak current protecting value increases as the duty cycle decreases. As a result, the safety operation of the switches is damaged greatly. A novel solution to improve over-current protection with constant
Xun Qiu, Yu Fang, Liang He, Yan Xing, Huizhen Wang   +4 more
openaire   +1 more source

The improvement in the reliability problem for air current breaker's over current protect function

2012 IEEE International Conference on Industrial Engineering and Engineering Management, 2012
Almost all plants have the experience of ACB's overcurrent relay (OCR) unexpectedly trip event. Each accident will cause a huge production loss. But manufacturers of OCR can't afford the cost-effective solution of problem. The most used solution is to install an additional relay (ex.
Cheng-Chung Chien, C. N. Chang, Yung-Tang Wu, C. C. Tseng, D. H. Chiu, J. K. Wan, C. S. Wu, C. T. Hsu, E. D. Chen, F. H. Li, T. H. Shao   +10 more
openaire   +1 more source

A low-dropout regulator with smooth peak current control (SPCC) topology for over current protection

2009 16th IEEE International Conference on Electronics, Circuits and Systems - (ICECS 2009), 2009
The proposed LDO regulator with a smooth peak current control (SPCC) circuit can be simultaneously controlled by an error amplifier to regulate the output voltage and the peak current controller to limit the current level. The SPCC circuit detects the information of load current and the dropout voltage to smoothly switch between the error amplifier and
Chun-Yu Hsieh, Chih-Yu Yang, Ke-Horng Chen   +2 more
openaire   +1 more source

Tuned Fuzzy Controller Based Over Current Protection Scheme

2008 Joint International Conference on Power System Technology and IEEE Power India Conference, 2008
The measurands from the remote location are gathered at central control room (CCR) for processing, taking corrective action and presenting to higher hierarchy in a presentable format and it requires remote terminal unit to communicate between them. The pre-processing of current has been done using fuzzy logic algorithm for pre-processing the measurands
V.K. Chandna, P. Kumar, Mini S. Thomas, Rajveer Singh   +3 more
openaire   +1 more source

Intelligent over-current protection scheme in inverter-based microgrids

2015 Smart Grid Conference (SGC), 2015
Recently by technological developments in inverterbased devices, application of these prominent apparatus has gained more attention in newly emerged microgrids (MGs). In this paradigm, the concept of multiple inverter-interfaced distributed generations (IIDGs)-based MG is now a reputable term.
Rahmat Khezri, Shoresh Shokoohi, Sajjad Golshannavaz, Hassan Bevrani   +3 more
openaire   +1 more source

New over current protection technology addressing DC Transportation

2016 IEEE Transportation Electrification Conference and Expo (ITEC), 2016
Fuses and Circuit Breakers play an important safety role in electrical transportation systems. Challenging new applications, especially in DC, have brought conventional current limiting devices to their limits. Indeed, mechanical circuit breakers may be too slow to open for networks with large DC fault currents. On the other hand, fuses may be too slow
Remy Ouaida, Jean Francois de Palma, Gille Gonthier   +2 more
openaire   +1 more source

Adaptive over current protection for distribution feeders with distributed generators

IEEE PES Power Systems Conference and Exposition, 2004., 2005
The connection of distributed generators (DG) to distribution networks influences the performance of the networks. This paper focuses on the impact of DG on the feeder protection, specifically the impact on the overcurrent (OC) relay performance. The paper presents simulation results to show the extent of deterioration a DG can cause on the OC relay ...
M. Baran, I. El-Markabi
openaire   +1 more source

Fast over-current protection of high power IGBT modules

2005 European Conference on Power Electronics and Applications, 2005
IGBT high power modules are protected against over-current and short-circuit. These phenomena are defined and classical methods are explained. A new protection circuit is presented with the help of a formal approach for enhanced response time.
Lefranc, Pierre, Bergogne, Dominique, Morel, Hervé, Allard, Bruno, Roche, Jean-François   +4 more
openaire   +2 more sources