Results 261 to 270 of about 336,665 (299)
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Circulating Current Suppression for MMC-HVDC under Unbalanced Grid Conditions
IEEE Transactions on Industry Applications, 2016Modular multilevel converter (MMC) is believed the most competitive solution for high-voltage direct current (HVDC) transmission using voltage source converters. Circulating current suppressing strategies based on proportional resonant (PR) controllers are widely used in MMC. This kind of strategies can effectively eliminate all the circulating current
Jinyu Wang +3 more
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Failure identification of induction motors by sensing unbalanced stator currents
IEEE Transactions on Energy Conversion, 1989The maintenance of electric drives is essential to their efficient and safe operation in any industry. The lack of an effectively designed and implemented maintenance policy will result in increased downtime, increased capital losses from catastrophic failures, and in some cases, a reduced level of personnel safety.
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Analysis on the unbalanced loop current of the traction power supply
2013 5th IEEE International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, 2013Harassment traction loop current along the rail causes interference to track circuit of communication directly. With the increasing of train speed and capacity, the loop current becomes stronger and stronger, hence, conductive interference by unbalanced loop current is more serious.
Shi Xiao +3 more
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Direct current machines control in unbalanced AC networks
IV IEEE International Power Electronics Congress. Technical Proceedings. CIEP 95, 2002This work presents the results and the methodology used for simulation of DC machines operating in an unbalanced electrical network, where it is expected that the representation of the AC power supply network involves cables, utility equivalent transformer, converter bridges, representation of the DC machine, and representation of the control and ...
J.R. Cogo, J. Souza de Sa
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Wide-band rotary transformer—Unbalanced current analysis
Proceedings of the IEEE, 1977Performance of a wide-band rotary transformer with approximately 1000:1 bandwidth (80 kHz-80 MHz) is described. A previous paper [1] gave theoretical analysis and experimental results based upon lossless balanced, transmission line theory. This paper extends the results to the case of a shielded transformer, and uses a combination of balanced and ...
C.W. Allen, H.L. Krauss
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Low-frequency magnetic shielding against unbalanced currents
2015 7th Asia-Pacific Conference on Environmental Electromagnetics (CEEM), 2015Magnetic shielding is an effective means to reduce low-frequency magnetic fields emitted from power cables and busbars. However, shielding against unbalanced currents has not been addressed well. This paper introduces equivalent magnetic dipoles for discussing magnetic shielding under a monopole current source. It is found that shielding is achieved by
Y. Du, Mingli Chen
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Improvement of unbalanced current capability of large turbine generators
IEEE Transactions on Power Apparatus and Systems, 1975This paper deals with the influence of unbalanced currents on the design and operation of large turbine generators. With the demand for electric power doubling every decade, generator ratings are growing very rapidly, and at the same time reliability and availability are becoming major considerations.
N. Takahashi, T. Kawamura, M. Nishi
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IEICE Transactions on Communications, 2010
This paper presents the new switching converter model used for analyzing the generation mechanism of ringing ground leakage (GL) current, generated during the transient, at switch on/off of any switching converter. By applying the Norton model, the proposed new model of switching converter can be formulated.
Terdsak Intachot +3 more
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This paper presents the new switching converter model used for analyzing the generation mechanism of ringing ground leakage (GL) current, generated during the transient, at switch on/off of any switching converter. By applying the Norton model, the proposed new model of switching converter can be formulated.
Terdsak Intachot +3 more
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Analysis of DC-link Current of Parallel Three-phase Inverters under Unbalanced Output Currents
IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society, 2019Analysis and calculation of DC-link current of three-phase inverter is one of significant part of the selection of de capacitors, system life expectation and the stability of converter control. However, almost all DC-link current analysis have focused on balanced three-phase ac output currents so far.
Liang Wu 0014 +3 more
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Measurements of power and current components in unbalanced and distorted three‐phase systems
European Transactions on Electrical Power, 1993AbstractThe paper deals with the instantaneous power theory in three‐phase circuits by using the instantaneous time phasors of voltage and current. Particularly it is shown that the instantaneous components of the current time‐phasor in a rotating reference frame p‐q, oriented in such a way that the instantaneous voltage time‐phasor points to the p ...
ANDRIA, Gregorio +3 more
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