Results 51 to 60 of about 645 (112)

Low-Voltage Ride-Through Algorithm for Grid-Forming Converters

IEEE Transactions on Power Electronics
In recent years, the increasing integration of renewable energy sources into power systems has led to significant changes in grid operation. Power electronic converters are primarily used to connect these power plants to the electrical system and, as key components in modern power systems, grid-forming (GFM) converters have emerged to provide the ...
Juan Dolado Fernández, Joaquín Eloy-García, Eduardo Rausell Navarro, Santiago Arnaltes Gómez, José Luis Rodríguez Amenedo   +4 more
openaire   +2 more sources

A DFIG low- and High-Voltage cascading failure through strategy based on GSC and RSC joint control

International Journal of Electrical Power & Energy Systems
In wind power DC transmission systems, commutation failures cause significant reactive power fluctuations at the direct current (DC) transmission end, leading to sequential changes in voltage from low to high and often causing wind turbines to disconnect
Xu Zhang, Xin Xu, Yi Wang, Juan Wei
doaj   +1 more source

Enhanced Control Strategies for Improving Low Fault Ride-Through Capability of Grid-Connected Doubly Fed Induction Wind Turbines

Energies
The DFIG faces challenges in providing fast and accurate support during grid voltage fluctuations. Severe voltage dips can trigger peak currents, which may damage the converter equipment and even lead to the disconnection of turbines from the grid.
Yuanjia Yang, Man Gao, Zhenxiong Zhou
doaj   +1 more source

LVRT Strategy Considering Reactive Power Support and Fluctuating Power Suppression for Photovoltaic Application [PDF]

Radioengineering
Addressing the insufficient negative sequence dynamic reactive current support and power doubling oscillations present in conventional low-voltage ride through control mechanisms for photovoltaic inverters, this study designs a q-axis command for both ...
Z. Zhang, Q. Liu, Y. Wang
doaj  

Multi-objective decoupling control strategy for low voltage ride through under asymmetrical faults

电力工程技术
For the traditional low voltage ride through control under asymmetrical faults, due to the limited control degrees of freedom, the grid-connected inverter control suffers from the problem of not being able to simultaneously realize the output current ...
LIU Qinyi, ZHONG Qidi, WANG Shiwen, LU Yajun, SUN Jinping, LIU Fei   +5 more
doaj   +1 more source

Low-Voltage Ride-Through Technology in Photovoltaic Power Generation

Highlights in Science, Engineering and Technology
As global photovoltaic (PV) integration surges, the ramifications of PV systems on the power grid have become increasingly pronounced. When faced with grid disturbances or faults, the abrupt disconnection of PV systems can critically imperil grid stability.
openaire   +1 more source

A Voltage Sag Generator for Wind Power Generation Using Contactors and IGBTs

Kongzhi Yu Xinxi Jishu, 2017
In view of the existing transformer form, VSG design scheme is limited by its switch devices, and the voltage sag time can not be accurately controlled. It presented a design scheme of three-phase VSG based on three-phase autotransformer, which used IGBT
QIN Bin, HUANG Hao, WANG Xin
doaj  

Integrated operation control technology of MMC high and low voltage ride-through under weak grid

电力工程技术
In order to solve the problem of high and low voltage fault ride-through of modular multilevel converter （MMC） under weak grid，a multi-link control strategy including capacitance voltage balancing control of integral，phase-to-phase and upper and lower ...
Wenzhong MA, Muzi SUN, Yusheng WANG, Wenyan ZHANG, Hengshuo LI, Yaheng ZHU   +5 more
doaj   +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  

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Testing Low Voltage Ride Through capabilities of solar inverters

Electric Power Systems Research, 2013
Abstract The increase in the rated power of PV inverters has brought with it new requirements, such as Low Voltage Ride Through and reactive power compensation. Field tests in PV plants are too expensive in terms of production losses, and therefore laboratory tests have become a simple, flexible and inexpensive alternative.
Santiago Arnaltes, D Santos-Martin
exaly   +2 more sources