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Pingping Han, Yu Zhang, Lei Wang, Yan Zhang and Zihao Lin
The doubly-fed induction generator (DFIG) wind turbine system, which is composed of the wind turbine, generator, rotor-side converter, grid-side converter, and so on, is a typical multi-time scale system. The dynamic processes at different time scales do...
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Kamran Hafeez, Shahid A. Khan, Alex Van den Bossche and Qadeer Ul Hasan
Modular multilevel converters (MMCs) are quickly emerging as a suitable technology for a voltage-source converter-based high-voltage direct-current (VSC-HVDC) transmission systems due to its numerous advantages as reported in literature. However, for a l...
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Faiza Abba and M?hemed Rachek
The present paper introduced a framework for multi-level coupling transient electromagnetic fields (EMF) and mechanical structural dynamics based on the finite element method (FEM). This framework was dedicated to predicting, with better accuracy, the wa...
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Tomasz Bednarczyk, Mateusz Szablicki, Adrian Halinka, Piotr Rzepka and Pawel Sowa
Complex phase shifting transformer protection scheme and complexity of the object itself created a need to use simulation programs for their analysis. Often phase shifting transformer (PST) are modeled as a simplified series impedance and quadrature volt...
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Xiaodong Li and Zheng Xu
The large number of switching elements in modular multilevel converters (MMCs) contribute a tremendous computational burden for electromagnetic transient (EMT) simulation programs. Detailed equivalent models (DEMs) and average value model (AVMs) are curr...
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Qiang Wang, Pingping Zhao, Xianbin Du, Fen Lin and Xu Li
This paper presents a novel integrated permanent magnet (PM) in-wheel motor (IWM) driving system for electric vehicles (EVs), in order to overcome the disadvantages of electromagnetic vibration and cogging torque in the topology scheme, on the basis of m...
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Guopeng Zhao and Jiyun Ren
The doubly-fed variable-speed pumped storage (DFVSPS) is an effective method to balance the fluctuation of renewable energy generation and is an important means of frequency and voltage regulation of a power grid. Firstly, this paper introduces the struc...
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Xiaoxiao Meng, Qianggang Wang, Niancheng Zhou, Shuyan Xiao and Yuan Chi
AC microgrid mainly comprise inverter-interfaced distributed generators (IIDGs), which are nonlinear complex systems with multiple time scales, including frequency control, time delay measurements, and electromagnetic transients. The droop control-based ...
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Xiaoxiao Meng, Qianggang Wang, Niancheng Zhou, Shuyan Xiao and Yuan Chi
AC microgrid mainly comprise inverter-interfaced distributed generators (IIDGs), which are nonlinear complex systems with multiple time scales, including frequency control, time delay measurements, and electromagnetic transients. The droop control-based ...
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Lidula N. Widanagama Arachchige, Athula D. Rajapakse and Dharshana Muthumuni
Wind turbine driven doubly-fed induction generators (DFIGs) are widely used in the wind power industry. With the increasing penetration of wind farms, analysis of their effect on power systems has become a critical requirement. This paper presents the mo...
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Nan Zhu, Ji Li, Lei Shao, Hongli Liu, Lei Ren and Lihua Zhu
A running transformer frequently experiences interturn faults; they are typically difficult to detect in their early stages but eventually progress to interturn short circuits, which cause damage to the transformer. Therefore, finding out the fault mecha...
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Thiago F. do Nascimento, Evandro A. D. F. Nunes, Elmer R. L. Villarreal, Ricardo F. Pinheiro and Andrés O. Salazar
The electromagnetic frequency regulator (EFR) device has proven to be an attractive solution for driving grid-connected electrical generators in distributed generation (DG) systems based on renewable energy sources (RES). However, the dynamic characteris...
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Junxi Wang, Qi Jia, Gangui Yan, Kan Liu and Dan Wang
With the development of large-scale new energy, the wind?thermal bundled system transmitted via high-voltage direct current (HVDC) has become the main method to solve the problem of wind power consumption. At the same time, the problem of subsynchronous ...
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Juan Paulo Robles Balestero, Jaimis Sajid Leon Colqui and Sérgio Kurokawa
This paper presents a novel three-phase transmission line model for electromagnetic transient simulations that are executed directly within the time domain. This model relies on distributed and frequency-dependent parameters, as well as employs modal tra...
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Qiang Wang, Rui Li, Ziliang Zhao, Kui Liang, Wei Xu and Pingping Zhao
Aiming at the impact of heat generation and temperature rise on the driving performance of a permanent magnet (PM) motor, taking the PM in-wheel motor (IWM) for electric vehicles as an object, research is conducted into the temperature distribution of th...
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Wei Liu, Yuanchao Hu, Haipeng Tian, Zhipeng Jiang, Xiaole Su, Jie Xiong, Wei Su and Yi Wang
Existing transmission lines and pipelines are frequently crossed and erected in parallel, meaning that if lightning strikes a wire and causes insulator flashovers, the resulting lightning current will spread through the grounding of the tower where the f...
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Xiaoshuai Bi, Likun Wang, Fabrizio Marignetti and Minghao Zhou
Aiming at the problem of end structure heating caused by the excessive eddy current loss of large synchronous condensers used in ultra-high voltage (UHV) power transmission, combined with the actual operation characteristics of the synchronous condenser,...
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Pawel Idziak and Krzysztof Kowalski
The article presents the results of work on an effective numerical study of selected transient states of a low-power electrical machine. The object of detailed research was a synchronized squirrel-cage induction motor. Its ability to work at a synchronou...
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Jingwei Zhang, Honghua Wang, Sa Zhu and Tianhang Lu
The bearingless switched reluctance motor (BSRM) integrates the switched reluctance motor (SRM) with the magnetic bearings, which avoids mechanical bearings-loss and makes it promising in high-speed applications. In this paper, a comprehensive framework ...
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Verónica Adriana Galván Sánchez,José Alberto Gutiérrez Robles,Víctor Hugo Ortiz Muro,Ricardo Sánchez Herrera
Pág. 123 a la 1
La función de un transformador es cambiar el nivel de tensión a través de un acoplamiento magnético. Debido a su construcción física, su representación como un circuito y su modelo matemático son muy complejos. El comportamiento electromagnético del tran...
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