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Negative-Sequence Current Injection for Fast Islanding Detection of a Distributed Resource Unit
IEEE Transactions on Power Electronics, 2008This paper presents an active islanding detection method for a distributed resource (DR) unit which is coupled to a utility grid through a three-phase voltage-sourced converter (VSC). The method is based on injecting a negative-sequence current through the VSC controller and detecting and quantifying the corresponding negative-sequence voltage at the ...
Houshang Karimi +2 more
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Energies, 2022 Stator faults are the most critical faults in induction motors as they develop quickly hence requiring fast online diagnostic methods. A number of online condition monitoring techniques are proposed in the literature to respond to such faults, including ...
Syaiful Bakhri, Nesimi Ertugrul
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A review of negative sequence current
2010 63rd Annual Conference for Protective Relay Engineers, 2010Sequence component analysis plays an essential role in analyzing power system faults and explaining some power system phenomena. It is very well known that negative sequence current could cause rotor damage, and that damage is highly detrimental to rotating machines such as motors and generators.
John Wang, Randy Hamilton
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Electric Power Systems Research, 2020 Inverter-based Resources (IBRs), including Wind Turbine Generators (WTGs), exhibit different negative -sequence fault current characteristics compared to conventional synchronous generators (SGs).
Aboutaleb Haddadi +2 more
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Negative-Sequence Current Injection of Transmission Solar Farms
IEEE Transactions on Power Delivery, 2020Integrating solar generation brings about unique challenges in power system protection. Previous studies have found inverter-based resources featuring distinct fault responses compared to conventional generators. The reduction in fault current magnitude and lack of negative and zero sequence currents can fundamentally impact the way that the power ...
Gefei Kou +4 more
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Negative-sequence currents for line-to-line faults
Electrical Engineering, 1953THE RECENT REVISION of the American Standards Association Standard for Rotating Electrical Machinery, C50, short-circuit clause specifies requirements for synchronous generators during 3-phase, line-to-ground, and line-to-line short circuits. A generator operating at rated kilovolt-amperes and power factor, with fixed excitation at 5-per-cent ...
R. F. Lawrence, R. W. Ferguson
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A Method to Reduce the Negative Sequence Current in Electrical Equipments
IEEE Latin America Transactions, 2016A multiphase optimal power flow method for limiting unbalances of currents in equipments using reactive compensation is proposed in this paper. The equipment modeling is based on current injection method in rectangular coordinates. The method was implemented and the proposed computational tool was developed with Matlab® and Lingo® softwares.
Tatianna Aparecida Pereira Beneteli +2 more
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IEEE Transactions on Power Electronics, 2020 During the unbalance operation of a standalone brushless doubly-fed induction generator (BDFIG), the negative sequence component causes significant unbalanced effect on the voltage and current of the power winding (PW).
Wei Xu +2 more
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Evaluation of negative-sequence-current compensators for high-speed electric railways
2016 IEEE Energy Conversion Congress and Exposition (ECCE), 2016This paper evaluates three alternative topologies for a static compensator (StatCom), suitable to eliminate the negative-sequence currents in a railway system. The compensator is placed in a transformer substation, which feeds two separate sections of the catenary.
Antonios Antonopoulos, Jan R. Svensson
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Negative Sequence Current in Megawatt Hydro Generators at Uprated Unbalanced Loads
2018 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), 2018The allowable negative sequence current (NSC) in large generator is 10% of its rated current as per IEC 60034-1 standard, irrespective of its rotor arrangement. This paper scrutinizes the NSC capability of a 250 MW salient pole hydro-generator following an unbalance at rated and above rated loads.
C. Carunaiselvane +2 more
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