Results 31 to 40 of about 2,383,589 (201)
Control of a Modular Multi-level Converter STATCOM for Low Voltage Ride-Through Condition [PDF]
, 2016 This paper presents a simulation study on the implementation of the Single Star Flying Capacitor Converter Modular Multi-level Cascaded Converter (MMCC-SSFCC) as a STATCOM operating under voltage sag condition.
Oghorada, OJK, Zhang, L
core +2 more sources
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
doaj +1 more source
Journal of Modern Power Systems and Clean Energy, 2019 To explore the clustered voltage balancing mechanism of the cascaded H-bridge static synchronous compensator (STATCOM), this paper analyzes the causes of unbalanced clustered voltage. The negative-sequence current caused by the compensation of unbalanced
Yu Jin +4 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
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
doaj +1 more source
Control of a Single-Star Flying Capacitor Converter Modular Multi-level Cascaded Converter (SSFCC-MMCC) STATCOM for Unbalanced Load Compensation [PDF]
, 2016 This paper presents a simulation study into the implementation of the single star flying capacitor converter modular multi-level cascaded converter (SSFCC-MMCC) as a STATCOM for unbalanced load compensation.
Nwobu, CJ, Oghorada, O, Zhang, LI
core +2 more sources
Turn-to-turn fault detection in transformers using negative sequence currents [PDF]
2011 IEEE Electrical Power and Energy Conference, 2011 This paper presents a new, simple and efficient protection technique which is based on negative sequence currents. Using this protection technique, it is possible to detect minor internal turn-to-turn faults in power transformers. Also, it can differentiate between internal and external faults.
Mariya Babiy +2 more
openaire +1 more source
A Negative-sequence Current Injection Method to Mitigate Voltage Imbalances in Microgrids
Eletrônica de Potência, 2011 This paper proposes a control strategy to reduce the voltage imbalances by injection of a proper negative-sequence current into the microgrid. This task can be done by each inverter connected to the microgrid in a shared way.
Gustavo M. S. Azevedo +4 more
doaj +1 more source
, 2017 Control structures have critical influences on converter-interfaced distributed generations (DG) under unbalanced conditions. Most of previous works focus on suppressing active power oscillations and ripples of DC bus voltage.
Chen, Zhe +4 more
core +1 more source
Revista EIA, 2019 This paper studied the use of a new stator current feature for detection of winding and cage bars faults in an induction motor, and presents the experimental validation of a detection and identification scheme using Support Vector Machines (SVM). This validation was performed in a test bed using 2 HP, 4 pole motors in which shorted winding and broken ...
Castillo, Silvia Oviedo +1 more
openaire +3 more sources