Results 21 to 30 of about 1,154,191 (288)
Practical calculation of asymmetric short circuit current of DFIG connected to distribution network [PDF]
E3S Web of Conferences, 2020 In view of the existing complex analytic calculations of DFIG short-circuit current are hardly applied in engineering projects, a practical calculation of asymmetric short-circuit current of DFIG is proposed.
Fu Pengwu +4 more
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Research on Life Loss of Generator Retainer Caused by Negative Sequence Current [PDF]
Journal of Physics: Conference Series, 2021 Abstract With a large number of wind and solar power sources connected to the power grid, higher requirements are put forward for the power generation equipment to respond to the power grid imbalance. The safety research of generator rotor retaining ring under the impact of negative sequence current is of great significance.
Yong Wang +3 more
openaire +1 more source
IEEE Open Journal of the Industrial Electronics Society, 2021 The growing relevance of voltage source converters (VSCs), and the deep impact they have on the development and maintenance of the electrical grid, increase the necessity of further research on how to deal with nonideal grid conditions from the VSCs ...
Pablo Montero-Robina +3 more
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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
doaj +1 more source
International Transactions on Electrical Energy Systems, 2015 Summary This paper proposes an improved transient negative-sequence calculation formula for a large-capacity nuclear power generator system under unbalanced network conditions. Because of the disadvantages of traditional transient negative-sequence ratings, I2*2 t is concluded to be inadequate for rating the generator imbalance capability.
Bao-jun Ge +4 more
openaire +1 more source
Turn-to-Turn Fault Diagnosis on Three-Phase Power Transformer Using Hybrid Detection Algorithm
Applied Sciences, 2021 A power transformer (PT) in power generation or transmission is critical to maintaining electrical continuity. Fault detection on a PT is needed, especially of incipient faults, which are often caused by a turn-to-turn fault (TTF) before it develops into
Chien-Hsun Liu +2 more
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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
openaire +1 more source
Positive sequence voltage control, full negative sequence cancellation and current limitation for static compensators [PDF]
, 2021 This paper presents a control scheme in the stationary reference frame for Static Synchronous Compensators that provides three features: 1) regulation of the positive sequence voltage to the nominal value, 2) full cancellation of the negative sequence ...
Camacho Santiago, Antonio +4 more
core +1 more source
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
doaj +1 more source
Control scheme for negative-sequence voltage compensation and current sharing in inverter-based grid-connected microgrids [PDF]
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Borrell Sanz, Angel +4 more
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