Results 141 to 150 of about 608 (186)

Quantitative Design of Virtual Impedance for LVRT Strategy of VSG

2021 3rd Asia Energy and Electrical Engineering Symposium (AEEES), 2021
The virtual synchronous generators (VSGs) face the risk of overcurrent when grid voltage sags occur. Although existing literatures have applied virtual impedance to VSG, aiming for suppressing overcurrent, rare papers mentioned how to meet the standards that the inverters output sufficient reactive power to power grid for low voltage ride-through (LVRT)
Liu Hang, Wang Yue, Liu Yonghui, Peng Yang, Shu Sirui, Liu Zengzhe   +5 more
openaire   +1 more source

Research of SC for Improving LVRT Capability of FSIG

Advanced Materials Research, 2012
The fast development of wind power generation brings new requirements for wind turbine integration to grid. In order to improve the lower voltage ride through(LVRT) capability of fixed speed induction generator(FSIG) in wind power generating systems, the mathematic model of FSIG, supercapacitor(SC) and converter is built in DIgSILENT in this paper.
Guo Qing Li, Li Meng Wang
openaire   +1 more source

Design and development of a mobile LVRT testing device

IEEE PES Innovative Smart Grid Technologies, 2012
A new type LVRT test device, basing on power electronics technology, has been developed. Compared with traditional reactor VGS, this device overcomes many drawbacks, such as bulky size, difficult to control precision, and difficult to continuously testing. Considering the characteristics of distributed system accessing to the grid by photovoltaic power
Xiaojin Lin, Beibei Wu, Junjun Zhang, Chenhui Niu   +3 more
openaire   +1 more source

LVRT-retardation-device for decentralized power plants

2014 Electric Power Quality and Supply Reliability Conference (PQ), 2014
During fault events in the electrical power grid nearby a synchronous generator, the rotor speed of the machine is increased, because dissipated power is below generated power. This may cause high rotor angle excursions and hence the machine to lose synchronism with the power grid.
Norbert Essl, Herwig Renner
openaire   +1 more source

A method of evaluating LVRT capability of wind turbines

2017 IEEE 2nd Advanced Information Technology, Electronic and Automation Control Conference (IAEAC), 2017
The low voltage ride through capability is an important aspect of the operation safety of the wind farm. According to the situation of the lack of effective monitoring of wind turbine operation, a online tracking quantitative evaluation method of wind turbine low voltage ride through capability (LVRT) is brought forward.
Han Yu, Wang Ying, Wang Tianzheng, Yu Hua, Wang Wei, Guan Shaoping, Wu Na   +6 more
openaire   +1 more source

Application of the LVRT function for the correct functioning of wind farms

AIP Conference Proceedings, 2020
Sustainable development and complication of modern electric power systems continues: new power facilities are being built and put into operation, a complete technical replacement of equipment and modernization of facilities currently in use are ongoing.
Vladimir Rudnik, Ruslan Ufa, Yana Malkova   +2 more
openaire   +1 more source

An Improved Crowbar Control Circuit of DFIG during LVRT

2021 IEEE 4th International Electrical and Energy Conference (CIEEC), 2021
In recent decades, the installed capacity of wind power is increased greatly, and doubly fed induction generator (DFIG) occupies a dominant position among wind power generators due to its excellent characteristics. However, how to improve the low voltage ride through (LVRT) success rate of doubly fed induction generator during the grid fault especially
Jinxin Li, Qi Qiu, Meng Zhan
openaire   +1 more source

The Regulation of Grid and Motor Side Converter of DFIG in LVRT

Advanced Materials Research, 2011
The most widely used generator type is the Doubly-Fed Induction Generator (DFIG). Because of the close coupling of the generator and the gird, the stator flux of DFIG is distorted while the Grid voltage dip happens. To achieve the LVRT, the LVRT control strategy of DFIG, especially the association of gird side and rotor side converter, is discussed ...
Kan Zhang, Su Juan Sun
openaire   +1 more source

Consider the LVRT capability of wind turbines in microgrid

Advances in Engineering Technology Research
During the grid connection and power generation process of wind turbine,voltage drops often occur due to grid faults,which may affect the stable operation of the grid. To ensure the stable operation of the grid,wind turbines should have the ability to withstand low voltage.
Junxian Lin, Zhiqiang Xu, Xin Yang, Yiqi Cai, Chenxi Huang   +4 more
openaire   +1 more source

LVRT Capability of DFIGs in Interconnected Power Systems

2014
This chapter presents a new control scheme for the enhancement of the low-voltage ride-through (LVRT) capability of doubly-fed induction generators (DFIGs). LVRT capability is provided by extending the range of operation of the controlled system to include typical post-fault conditions.
Jahangir Hossain, Hemanshu Roy Pota
openaire   +1 more source