Results 11 to 20 of about 6,965 (218)

Study on the Influence of Winding Height on the Short-Circuit Withstand Capability of 110 kV Transformers [PDF]

Sensors
The short-circuit withstanding capability of a transformer is a critical indicator for evaluating its operational reliability. This study investigates the influence of the low-voltage winding height, a key structural parameter, on the electromagnetic ...
Yukun Ma, Xiu Zhou, Xiaokang Wang, Tian Tian, Chenfan Tai, Dezhi Chen, Ziyuan Xin, Sijun Wang   +7 more
doaj   +2 more sources

Currents in the overhead transmission line lighting wire in case of single-phase short circuit

E3S Web of Conferences, 2018
The algorithms for currents induced in a grounded lightning wire (LW) with single-phase short circuit (SC) calculation are considered. It is shown that the method of short-circuit current and current in LW simultaneous determination gives more correct ...
Zimin Kirill, Rubtsova Nina, Ryabchenko Vladimir, Tokarskskiy Andrey   +3 more
doaj   +1 more source

Choosing the type of equivalent circuit of traction substation when calculating short-circuit currents in 25 kV power supply system

Вестник Научно-исследовательского института железнодорожного транспорта, 2020
When calculating short circuit currents in the traction network, it is necessary to take into account the input resistance of the traction substation, including the resistance of the transformers of the substation and the resistance of the power supply ...
E. P. Figurnov, Yu. I. Zharkov, N. A. Popova   +2 more
doaj   +1 more source

Rotor Winding Short-Circuit-Fault Protection Method for VSPSGM Combining the Stator and Rotor Currents

Applied Sciences, 2022
Rotor winding short circuit faults are common faults for variable-speed pumped-storage generator-motors (VSPSGM). At present, the exciting rotor fault protection of VSPSGM is simple and has low sensitivity. It can only act when the instantaneous value of
Jian Qiao, Yikai Wang, Rufei He, Wenhui Wang, Xianggen Yin, Yumin Peng, Hao Zhang   +6 more
doaj   +1 more source

THE EFFECT OF ELECTROMAGNETIC COUPLING BETWEEN WIRES DOUBLE- CIRCUIT OVERHEAD LINE AND THE GROUND ON TRANSIENTS

Известия высших учебных заведений: Проблемы энергетики, 2019
. A method is proposed for calculating the initial value of the periodic term of the short- circuit strength of a dual-circuit overhead transmission line using multiphase replacement circuits. The method takes into account the electromagnetic connections
R. U. Galeeva, A. V. Nazarov, A. A. Khasanshin   +2 more
doaj   +1 more source

Real-Time Short-Circuit Current Calculation in Electrical Distribution Systems Considering the Uncertainty of Renewable Resources and Electricity Loads

Applied Sciences
Existing short-circuit calculation methods for distribution networks with renewable energy sources ignore the fluctuation of renewable sources and cannot reflect the impact of renewable sources and load changes on short-circuit current in real time at ...
Dan Liu, Ping Xiong, Jinrui Tang, Lie Li, Shiyao Wang, Yunyu Cao   +5 more
doaj   +1 more source

Algorithm and Software for Operative Calculations of the Short Circuits Modes

MATEC Web of Conferences, 2015
Smart power grids provide efficient control of power flows or other grid variables, such as voltages or short circuit currents. Most essential the control has become, if the consumers are electrical systems of high power capacity.
Borisov Stanislav V., Kladiev Sergey N., Obraztsov Konstantin V.   +2 more
doaj   +1 more source

A Short-Circuit Calculation Method for DFIG-Based Wind Farms

IEEE Access, 2018
Short-circuit calculations for wind farms are crucial for determining equipment ratings and providing basic information for protection coordination. In this paper, a practical calculation method of short-circuit currents (SCCs) is proposed for doubly fed
Mingyang Liu, Wenxia Pan, Rui Quan, Hongyu Li, Tongchui Liu, Gang Yang   +5 more
doaj   +1 more source

An adaptive virtual impedance fault current limiter for optimal protection coordination of islanded microgrids

IET Renewable Power Generation, 2022
Fault currents of inverter‐interfaced distributed generators (IIDGs) depend on inverter controllers. Thus, IIDGs fault currents are different than those of synchronous‐based DGs, both from the magnitude and waveshape perspectives.
Talal Elemamali Sati, Maher A. Azzouz
doaj   +1 more source

Fault Current and Voltage Estimation for Pole-to-Pole Faults in Modular Multilevel Converter Based DC Grids Considering AC Active Power

Applied Sciences, 2021
DC short-circuit faults are one of the challenges for modular multilevel converter (MMC) based DC grid. It is vital for proper design of protection system to estimate the fault currents and voltages.
Hui Cai, Junli Zhang, Jingqiu Yu, Zheren Zhang   +3 more
doaj   +1 more source