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Pavel Mikhalichenko,Ivan Biliuk,Olexandr Kyrychenko,Victor Nadtochii,Anatoly Nadtochiy
Pág. 12 - 18
All types of relay protection are based on comparing the values for certain attributes under a system's normal and emergency operational modes. A new attribute for defining the emergency mode in a direct current traction electricity supply system has bee...
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D. A. Zabarilo
Pág. 29 - 35
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With the increasing demand of transmitting bulk-power over long-distance, the ultra high-voltage direct-current (UHVDC) transmission systems become an attractive option. Nowadays, not only the line commutated converter (LCC) based systems, but also the m...
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N. Ntsadu
During an exceedance of the voltage unbalance limit at a busbar there is a need to determine which entity is causing the problem between Eskom, wind farms and other entities that can influence the voltage unbalance at the busbar. There were voltage unbal...
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Huatan Chen, Gaofeng Zheng, Juan Liu, Jiaxin Jiang, Guoyi Kang, Xiang Wang, Wenwang Li and Yifang Liu
The precise manufacturing of micro/nano structures is the key to the rapid development of flexible micro/nano systems. In this paper, a sinusoidal high-voltage alternating current (AC) power is designed for electrohydrodynamic direct-writing (EDW) techno...
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Siqi Wang, Zhenghao Lu, Kunpeng Xu, Hongguang Dai, Zhanxia Wu and Xiaopeng Yu
A novel low-power MOS-only voltage reference is presented. The Enz?Krummenacher?Vittoz (EKV) model is adopted to provide a new perspective on the operating principle. The normalized charge density, introduced as a new variable, serves as an indicator whe...
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Brayan Enrique Aguirre-Angulo, Lady Carolina Giraldo-Bello, Oscar Danilo Montoya and Francisco David Moya
This study addresses the problem of the maximization of the voltage stability index (λ" role="presentation">???
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-coefficient) in medium-voltage distribution networks considering the optimal placement and sizing of dispersed generators. The pr...
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Shun Sang, Binhui Pei, Jiejie Huang, Lei Zhang and Xiaocen Xue
Voltage source (VS) control based on inertia synchronization is a novel phase lock loop (PLL)-less autonomous grid-synchronization control strategy suitable for the permanent magnet synchronous generator (PMSG)-based wind turbine. It can autonomously sen...
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Bor-Ren Lin and Kun-Yi Chen
A new hybrid inductor-inductor-capacitor (LLC) converter is investigated to have wide voltage input operation capability and zero-voltage turn-on characteristics. The presented circuit topology can be applied for consumer power units without power factor...
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Contactless capacitive (open-air) sensors are applied to monitor overvoltages near overhead line terminations at a substation or at the transition from underground cables to overhead lines. It is shown that these sensors, applied in a differentiating/int...
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Lekshmi R Chandran,Dr. Ilango K,Dr. Manjula G Nair
Distribution of quality power to the consumers is one of the greatest challenges in power industry. In practice, the presence of various nonlinear/sensitive loads disturbs the quality of power supplies in distribution system. Dynamic voltage restorer (DV...
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Marija Vujacic, Manel Hammami, Milan Srndovic and Gabriele Grandi
The three-phase voltage source inverter (VSI) is de facto standard in power conversion systems. To realize high power density systems, one of the items to be correctly addressed is the design and selection of the dc-link capacitor in relation to the volt...
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Kyoung-Pil Kang, Younghoon Cho, Myung-Hyo Ryu and Ju-Won Baek
In three-level neutral-point-clamped (NPC) inverters, the voltage imbalance problem between the upper and lower dc-link capacitors is one of the major concerns. This paper proposed a dc-link capacitor voltage balancing method where a common offset voltag...
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Yanbo Che, Wenxun Li, Xialin Li, Jinhuan Zhou, Shengnan Li and Xinze Xi
The rapid development of renewable energy calls for feasible and reliable technologies to transmit and integrate power into grids. Voltage Source Converter (VSC)- Direct Current (DC) technology is considered as a promising solution for its independent co...
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Hung-I Hsieh and Hao Wang
A cost-effective light-emitting diode (LED) current balance strategy using a variable voltage regulator (VVR) with low dropout vDS control is proposed. This can regulate the multiple metal-oxide-semiconductor field-effect transistors (MOSFETs) of the lin...
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Fadil Hicham, Driss Yousfi, Elhafyani Mohamed Larbi and Aite Driss Youness
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José Raúl Castro, Maarouf Saad, Serge Lefebvre, Dalal Asber and Laurent Lenoir
This paper presents an efficient algorithm to solve the multi-objective (MO) voltage control problem in distribution networks. The proposed algorithm minimizes the following three objectives: voltage variation on pilot buses, reactive power production ra...
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Victor F. Mendes, Frederico F. Matos, Silas Y. Liu, Allan F. Cupertino, Heverton A. Pereira and Clodualdo V. De Sousa
Due to the increasing number of wind power plants, several countries have modified their grid codes to include specific requirements for the connection of this technology to the power system. One of the requirements is the ride-through fault capability (...
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D. S. Bilukhin
Pág. 68 - 72
The possibility of construction of a steady natural vibration system by introduction of successive correction link as an aperiodic link of the first-order is considered.
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M. O. Kostin,P. Ye. Mihalichenko
Pág. 84 - 88
In the article a new indication of emergency conditions detection for the traction DC power supply system, namely the rate of decreasing the traction substation feeder voltage is suggested. The indication considered allows determining a kind of short cir...
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