Results 81 to 90 of about 2,675 (224)

Voltage-induced stresses during Low Voltage Ride Through (LVRT) in the drive train of wind turbines with DFIG

RE&PQJ
Nowadays   stochastic   occurrence   of   main   grid   disturbances (LVRT,  FRT)  leads  to  high  level  vibrational  excitation  of  the drive train during operation of wind turbines. Regardless  of  the  drivetrain  design  as a  direct,  hybrid  or  multi-stage  geared  one  in  this  case  high  mechanical  and  electrical stresses should be ...
null Dr.-Ing. Jan Wenske, null Prof. i.R. Dr.-Ing. habil. Ulrich Beckert   +1 more
openaire   +1 more source

Research on the Adaptive Protection Method for Distribution Networks With Inverter‐Type Distributed Power Supplies: Based on Short‐Circuit Impedance Calculation

Engineering Reports, Volume 7, Issue 4, April 2025.
If the linear node voltage equation set obtained from the faulty composite sequential network is solved directly by linear transformation, it is not possible to accurately calculate and obtain the fault current and the voltage at the merging point of IIDG.
Zhuoran Song, Zhanjun Li, Yongji Tong, Wenlei Dou, Hongbo Zhu, Tao Jiang   +5 more
wiley   +1 more source

Voltage sag assessment method considering low-voltage ride-through of inverter-interfaced distributed generators

International Journal of Electrical Power & Energy Systems
Voltage sags often disrupt the normal functioning of sensitive equipment and distributed generators (DGs), making voltage sag mitigation based on corresponding assessments crucial. Voltage sag characteristics, including voltage magnitude and sag duration,
Xian-yong Xiao, Gui-shan Song, Wen-Xi Hu, Xin-yue Song   +3 more
doaj   +1 more source

Power Control Flexibilities for Grid-Connected Multi-Functional Photovoltaic Inverters [PDF]

, 2016
This study explores the integration issues of next-generation high-penetration photovoltaic (PV) systems, where the grid is becoming more decentralised and vulnerable.
Blaabjerg, Frede, Simoes, Marcelo, Wang, Huai, Yang, Yongheng   +3 more
core   +2 more sources

Estimation of Positive‐, Negative‐, and Zero‐Sequence Current and Voltage Phasors of UIPC VSCs for Short‐Circuit Faults in Transmission Lines

Engineering Reports, Volume 7, Issue 2, February 2025.
1. Presenting a phasor estimation model for 72‐pulse converters of UIPC device based on artificial neural networks. 2. Using the data of a single terminal to estimate for various types of short circuits on both sides of UIPC. 3. No need for a predetermined threshold value to detect the fault side around UIPC. 4.
Babak Bahadori, Ali Nahavandi, Mahyar Abasi   +2 more
wiley   +1 more source

Study on Low Voltage Ride Through for Direct-drive VSCF Wind Power System

Kongzhi Yu Xinxi Jishu, 2010
New grid regulation brings forward the requirements on wind turbines for having Low Voltage Ride Through(LVRT)capability and supplying reactive power compensation to the grid during voltage sag prcoess.
张宪平
doaj  

Low-voltage ride-through control strategy for permanent magnet synchronous generator under weak grid

Diance yu yibiao
In order to improve the low-voltage ride-through（LVRT）capability of permanent magnet synchronous generator（PMSG）under weak grid, this paper proposes a low-voltage ride-through control strategy for power support and auxiliary protection of unloading ...
CHEN Zhong, DING Linzhi, GU Chunsong
doaj   +1 more source

Minimising the impact of disturbances in future highly-distributed power systems [PDF]

, 2017
It is expected that future power systems will require radical distributed control approaches to accommodate the significant expansion of renewable energy sources and other flexible grid devices.
Belloni, F.R., Blair, S.M., Burt, G.M., Hänninen, S., Kedra, B., Kosmecki, M., Lof, A., Lüers, B., Merino, J., Pala, D., Temiz, A., Valov, M.   +11 more
core   +1 more source

Enhancement of Low Voltage Ride Through (LVRT) Capability of DFIG-Based Wind Turbines with Enhanced Demagnetization Control Model

Energies
Since the stator of DFIG-based wind turbines is directly connected to the grid, it is dramatically affected by transient situations that may occur on the grid side. In order to meet grid code requirements, reactive power support must be provided to keep the DFIG connected to the grid during the transient state. To achieve this, Low Voltage Ride Through
M. Kenan Döşoğlu, Muhsin Uğur Doğan
openaire   +2 more sources

Frequency‐Power Coupling Dynamic Response and Regulation Characteristics of Variable Speed Pumped Storage Unit With Full‐Size Converter

Energy Science &Engineering, Volume 13, Issue 2, Page 811-832, February 2025.
Water diversion system of the variable speed pumped storage unit with full‐size converter. ABSTRACT This paper aims to study the frequency‐power coupling dynamic response and regulation characteristics of a variable speed pumped storage unit (VSPSU) with full‐size converter (FSC).
Yanhao Li, Kedong Shu, Wencheng Guo
wiley   +1 more source