Results 151 to 160 of about 441,873 (190)

Grid Support During Asymmetrical Faults using Negative Sequence Current Injection

2019 IEEE 4th International Future Energy Electronics Conference (IFEEC), 2019
This paper investigates the effect of injecting negative sequence reactive current into the grid in case of asymmetrical faults. In such conditions, the negative sequence voltage will increase and may cause instability in the system or damage to some equipment such as three phase rotating machines. Hence, the aim of this study is to support the grid by
Mohammad Bani Shamseh, Ruben Inzunza, Issei Fukasawa, Tsuguhiro Tanaka, Tatsuaki Ambo   +4 more
openaire   +1 more source

Negative-Sequence Current Injection for Fast Islanding Detection of a Distributed Resource Unit

IEEE Transactions on Power Electronics, 2008
This 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, Amirnaser Yazdani, Reza Iravani   +2 more
openaire   +2 more sources

A Novel Negative-Sequence Current Injection Method for Reducing LVPMM Electromagnetic Thrust Ripple Considering Static Longitudinal End Effect

IEEE Transactions on Industrial Electronics, 2021
The thrust force ripple of a linear motor includes positioning force and electromagnetic thrust ripple. Compared to the conventional rotary motor, linear vernier permanent magnet machines (LVPMM) break at both ends, leading to three-phase asymmetry.
Zhi Chen, Wubin Kong, Chaojie Shi, Ronghai Qu, Vincent Fedida   +4 more
openaire   +1 more source

Flexible Nonsinusoidal Zero Sequence Voltage Injection Method to Extend Negative Sequence Current Compensation Range for Star-Connected CHB STATCOM

IEEE Transactions on Power Electronics, 2021
DC voltage balance based on zero sequence voltage is commonly used for star-connected cascaded H-Bridge (SCHB) STATCOM to compensate negative sequence current. However, zero sequence voltage injection brings about side-effect of increasing STATCOM output voltage and thus the Negative sequence Current Compensation Range (NCCR) is significantly limited ...
Daorong Lu, Chenxing Sha, Yu Yu, Xiang Li, Haibing Hu, Yan Xing   +5 more
openaire   +1 more source

Improved Negative Sequence current Injection Balancing Method considering Zero Sequence Voltage for cascaded H-bridge STATCOM

2019 22nd International Conference on Electrical Machines and Systems (ICEMS), 2019
Cascaded H-bridge STATCOM is widely adopted to regulate the power quality in power grid and industrial application. Considering the existence of zero-sequence voltage which cannot be neglected in the simulation model, this paper proposed an improved clustered voltage balancing strategy based on negative-sequence current injection.
Lingda Li, Jianze Wang, Ningning Li, Zhenlei Yu, Xiangyu Sai   +4 more
openaire   +1 more source

Evaluation of negative sequence current injecting into the public grid from different traction substation in electrical railways

IET Conference Publications, 2009
This paper formulated the mathematical model of traction transformers of single phase traction substation, Three phase- two phase traction substations (V/V traction transformer, Scott transformer, impedance-matching balance transformer) which are widely used in China electrified railways.
null Haiqun Wang, null Yingjie Tan, null Qin-chang Gui   +2 more
openaire   +1 more source

Negative sequence current injection control algorithm compensating for unbalanced PCC voltage in medium voltage PMSG wind turbines

2014 International Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE ASIA), 2014
This paper proposes a control algorithm for permanent magnet synchronous generator with a back-to-back three-level neutral-point clamped voltage source converter in a medium-voltage offshore wind power system under unbalanced grid conditions. The proposed control algorithm particularly compensates for the unbalanced grid voltage at the point of common ...
null Jayoon Kang, null Daesu Han, Yongsug Suh, null Byoungchang Jung, null Jeongjoong Kim, null Jonghyung Park, null Youngjoon Choi   +6 more
openaire   +1 more source

Capacitor voltage balance performance comparison of MMC-STATCOM using NLC and PS-PWM strategies during negative sequence current injection

2016 18th European Conference on Power Electronics and Applications (EPE'16 ECCE Europe), 2016
This paper addresses the modular multilevel converter applied as a static synchronous compensator. The main objective of this work is to compare the converter performance considering two different submodule capacitor voltage balancing strategies: nearest level control and phase-shifted pulse width modulation, during positive and negative sequence ...
Pereira, Heverton A., F. Cupertino, Allan, S. Xavier, Lucus, Sangwongwanich, Ariya; id_orcid 0000-0002-2587-0024, Máthé, Lászlo; id_orcid 0000-0002-1029-3340, Bongiorno, Massimo, Teodorescu, Remus; id_orcid 0000-0002-2617-7168   +6 more
openaire   +3 more sources

A Novel Islanding Detection Technique Based on Positive-Feedback Negative Sequence Current Injection

IEEE Transactions on Power Electronics, 2022
Mohammad Bani Shamseh, Ruben Inzunza, Tatsuaki Ambo   +2 more
openaire   +1 more source

Impact of IBR Negative-Sequence Current Injection on Ground Fault Temporary Overvoltage and Ground Overcurrent Protection

2022 IEEE/PES Transmission and Distribution Conference and Exposition (T&D), 2022
Alexandre B. Nassif, Eric Loi, Keaton A. Wheeler, Shay Bahramirad   +3 more
openaire   +1 more source