Results 11 to 20 of about 7,769,894 (338)

DC Restoration by Data-Aided Sequence in Kramers-Kronig Receiver

open access: yesIEEE Photonics Journal, 2022
In recent years, Kramers-Kronig (KK) receiver has been widely studied because of its simple structure and the ability of digital signal processing (DSP) to recover complex value signals.
Zhonghan Su   +6 more
doaj   +1 more source

DC Bus Voltage Selection for a Grid-Connected Low-Voltage DC Residential Nanogrid Using Real Data with Modified Load Profiles

open access: yesEnergies, 2021
This study examines various low voltage levels applied to a direct current residential nanogrid (DC-RNG) with respect to the efficiency and component cost of the system.
Saeed Habibi   +3 more
doaj   +1 more source

Research on fault line selection method of mine power network

open access: yesGong-kuang zidonghua, 2018
In view of characteristics of DC component of transient zero-sequence current in fault lines is larger than that of normal lines when additional DC source system of mine power network occurrs single-phase earth fault, a fault line selection method of ...
LI Ke   +5 more
doaj   +1 more source

A new leakage protection method for mine power network

open access: yesGong-kuang zidonghua, 2016
A new leakage protection method was proposed which was based on least-square matrix algorithm. In the method, zero sequence current signal of each brance is extracted on the basis of additional DC source system, and DC component of the zero sequence ...
ZHAO Jianwen   +6 more
doaj   +1 more source

The issues of compensated high voltage power cable lines’ switchings by the example of CL 330 kv yuzhnaya - pulkovskaya DC components of SF6-insulated circuit breakers

open access: yesИзвестия высших учебных заведений: Проблемы энергетики, 2017
Nowadays SF6-insulated circuit breakers are the most widely used breakers for extra high voltage grids. Operational experience has shown that they are incapable of making fast switching of power transmission lines equipped with shunt reactors due to zero-
S. E. Kasyanov   +2 more
doaj   +1 more source

Measurement of the DC current based on magnetic fluids with an orthogonal magnetic field

open access: yesMeasurement + Control, 2020
Measurement of DC current is critically important in a wide range of applications, such as in photovoltaic power generation and DC power transmission. In this paper, the DC current measuring method based on magnetic fluids with orthogonal magnetic fields
Jian-Ying Zhang   +4 more
doaj   +1 more source

Electron-scale shear instabilities: magnetic field generation and particle acceleration in astrophysical jets [PDF]

open access: yes, 2014
Strong shear flow regions found in astrophysical jets are shown to be important dissipation regions, where the shear flow kinetic energy is converted into electric and magnetic field energy via shear instabilities.
Alves, E. P.   +3 more
core   +2 more sources

Mitigation of DC Components Using Adaptive BP-PID Control in Transformless Three-Phase Grid-Connected Inverters

open access: yesEnergies, 2018
Transformerless grid-connected inverters, due to their advantages of high efficiency, small volume and light weight, have been the subject of more research and interest in recent years.
Long Bo   +4 more
doaj   +1 more source

Investigation of impact of DC component on breakdown characteristics for different electric fields under composite AC & DC voltage

open access: yesHigh Voltage, 2022
The valve side of the converter in the high‐voltage direct current is subjected to mixed voltages such as composite AC & DC voltage. In this study, the effects of the homogeneity of electric field on breakdown voltage were investigated for different ±DC ...
Mehmet Murat Ispirli   +4 more
doaj   +1 more source

Elimination of circulating current in parallel operation of single phase inverter using droop controller

open access: yesEngineering Science and Technology, an International Journal, 2022
This paper presents the control strategy for parallel operation of an inverter to eliminate DC & AC circulating current. This paper also analyses the cross-current between parallel connected inverter due to the difference in output voltage magnitudes
Ravi Kumar Gupta   +2 more
doaj   +1 more source

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