Results 41 to 50 of about 868,690 (284)
Detection of Internal Faults in Transformers By Negative Sequence Current
SAMRIDDHI : A Journal of Physical Sciences, Engineering and Technology, 2013 Initially it is very difficult to find out internal fault in transformer. These internal fault are hazardous and causes overheating of transformer oil and winding, it consequences as insulation failure because of this uninterrupted power supply cannot be continued. It is more difficult to detect internal fault in small ratting transformer.
Satyam Prakash, Vivek Mishra
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MMC-SST input-level control strategy considering power quality optimization
电力工程技术, 2022 The surge of negative sequence component of current affects the waveform quality of grid side current and endangers the normal operation of the system when the three-phase voltage of solid state transformer (SST) in the distribution network is unbalanced
ZHAO Wei +3 more
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, 2023 The cascaded H-bridge (CHB) low-capacitance static compensator (LC-StatCom) has a limited negative-sequence current injection capability compared to a conventional CHB StatCom, due to the comparatively larger oscillations on the capacitor voltages ...
Ramos, Ezequiel Rodriguez +4 more
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Probabilistic modeling of negative-sequence current in three-phase power systems with statistically unbalanced phases [PDF]
, 2022 -In this work the parameters of an unbalanced three-phase component, such as a load or a transmission line, are described as random variables with known statistical properties.
Bellan D.
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Unbalanced Current Sharing Control in Islanded Low Voltage Microgrids
Energies, 2018 This paper reports a new control strategy to improve sharing of unbalanced currents in islanded LV microgrids. This technique provides fast and effective sharing of positive-, negative- and zero-sequence currents, and is the first example of zero ...
Foad Najafi +2 more
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A computationally efficient current controller for simultaneous injection of both positive and negative sequences [PDF]
2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe), 2017 This work was supported by the Research Promotion Foundation (RPF, Cyprus, Project KOINA/SOLAR-ERA.NET/1215/06), by the Ministry of National Infrastructure Energy and Water (Israel) and the SOLAR-ERA.NET (European Union's Seventh Framework Programme). © 2017 IEEE. Personal use of this material is permitted.
Ali, Zunaib +3 more
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Journal of Modern Power Systems and Clean Energy, 2022 The doubly-fed induction generator (DFIG) is considered to provide a low-reactance path in the negative-sequence system and naturally comply with requirements on the negative-sequence reactive current in emerging grid codes.
Yuanzhu Chang +5 more
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A timely switch fault ride-through method for VSC-HVDC system
电力工程技术, 2022 In order to achieve the fault through of voltage source converter-based high voltage direct current (VSC-HVDC)system during alternating current (AC) system asymmetric faults and keep stability of the impedance at steadystate, a timely switch fault ...
WANG Ke +5 more
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Identification and location method of asymmetric faults in coal mine power network
Gong-kuang zidonghua, 2018 Three asymmetrical faults of singe-phase grounding, singe-phase line breakage and ferroresonance in coal mine power network are easily misjudged, and existing methods hardly identify the three faults correctly.
WANG Qingliang, QIN Jie, LIU Xinru
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Effects of Negative Sequence Voltage Subharmonics on Cage Induction Motors
, 2022 In some power systems, voltage waveforms contain, apart from harmonics, interharmonics and subharmonics that are components of frequency less than or not an integer multiple of the fundamental frequency.
Marcin Pepliński +4 more
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