Results 231 to 240 of about 4,287,450 (289)

Dynamic Phasor Modeling of LCC-HVDC Systems: Unbalanced Operation and Commutation Failure

Canadian journal of electrical and computer engineering, 2019
This paper develops a dynamic phasor model of a line-commutated converter high-voltage direct current (LCC-HVDC) system that includes unbalanced operation and commutation failure.
M. Daryabak, S. Filizadeh, Afshin Bagheri Vandaei   +2 more
semanticscholar   +1 more source

The Unbalanced Linguistic Ordered Weighted Averaging operator

International Conference on Fuzzy Systems, 2010
Aggregation operators for linguistic variables usually assume a uniform and symmetrical distribution of the linguistic terms that define the variable. A well-known aggregation operator is the Linguistic Ordered Weighted Average (LOWA), which has been extensively applied.
David Isern, Lucas Marin, Aida Valls, Antonio Moreno   +3 more
openaire   +1 more source

Analysis of Synchronous Machines under Unbalanced Operation

IEEE Transactions on Power Apparatus and Systems, 1970
Considering only the fundamental frequency components of currents and voltages, an idealized synchronous machine under any unbalanced load conditions can be represented in phase coordinates, by the sum of a constant impedance matrix and an impedance matrix whose elements are functions of current phase angles. A general method of solving for the unknown
Viruru Subba-rao, Richard Langman
openaire   +1 more source

Multi-pulse STATCOM operation under unbalanced voltages

2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309), 2003
This work presents a study about static synchronous compensators (STATCOM) operating in electrical systems where the voltages are unbalanced and contain negative sequence components. In balanced systems the STATCOM has a very good performance, allowing compensation of capacitive or inductive reactive power with a fast transient response.
C.A.C. Cavaliere, E.H. Watanabe, M. Aredes   +2 more
openaire   +1 more source

Generalized Harmonic Control for CHB Converters With Unbalanced Cells Operation

IEEE transactions on industrial electronics (1982. Print), 2020
Multilevel cascaded H-bridge (CHB) converters are an attractive solution for multiple applications like flexible ac transmission systems and solid-state smart transformers, among others. This article is focused on a CHB working with unbalanced conditions
A. M. Alcaide, J. I. Leon, V. Monopoli, S. Vazquez, Marco Liserre, L. Franquelo   +5 more
semanticscholar   +1 more source

STATCOM Control for Operation with Unbalanced Voltages

2006 12th International Power Electronics and Motion Control Conference, 2006
In view of STATCOM operation analysis, special attention must be paid to the operation with unbalanced network voltages. In this paper a control algorithm that enables STATCOM operation with unbalanced voltages is presented. The algorithm is based on the compensator mathematical model in the d-q coordinate system.
Bostjan Blazic, Igor Papic
openaire   +1 more source

A Unified Control Structure for Grid Connected and Islanded Mode of Operation of Voltage Source Converter Based Distributed Generation Units Under Unbalanced and Non-Linear Conditions

IEEE Transactions on Power Delivery, 2020
This manuscript develops a unified control structure for Distributed Generation (DG) units based on Voltage Source Converters considering unbalanced and non-linear operating conditions.
Noel Richard Merritt, C. Chakraborty, P. Bajpai, B. Pal   +3 more
semanticscholar   +1 more source

Unbalanced line characterization for differential‐mode operation

Microwave and Optical Technology Letters, 2006
AbstractThis paper presents a theoretical model of the differential‐mode operation of unbalanced pairs and a method for its characterization. A differential pair having temporal imbalance is characterized using S‐parameter representations. Measurements in the frequency domain are performed.
Sedig S. Agili, Stephen B. Smith, Vittal Balasubramanian   +2 more
openaire   +1 more source

Sensorless Virtual Flux Combined Control of Grid Connected Converters With High Power Quality Under Unbalanced Grid Operation

IEEE Transactions on Sustainable Energy, 2020
This paper presents a novel sensorless combined control for grid connected power electronic converters (GCCs) under both balanced and unbalanced grid operation.
A. Jabbarnejad, S. Vaez‐Zadeh, M. Khalilzadeh   +2 more
semanticscholar   +1 more source

Optimal Operation of Soft Open Points in Active Distribution Networks Under Three-Phase Unbalanced Conditions

IEEE Transactions on Smart Grid, 2019
The asymmetric integration of distributed generators (DGs) exacerbates the three-phase unbalanced condition in distribution systems. The serious unbalanced operation causes inefficient utilization of network assets and security risks in the system.
Peng Li, H. Ji, Chengshan Wang, Jinli Zhao, G. Song, F. Ding, Jianzhong Wu   +6 more
semanticscholar   +1 more source