Results 21 to 30 of about 12,297 (303)

Improved control of virtual synchronous generator under unbalance of grid voltage

Energy Reports, 2023
Asymmetric faults in the power grid will lead to unbalanced grid voltage. When the traditional VSG control operates under unbalanced grid voltage, the output current will be unbalanced, resulting in output power oscillation. This article first establishes a mathematical model for traditional VSG control, and then analyzes the problems that arise when ...
Chunxue Wen, Yijun Huang, Jianlin Li, Peng Wang   +3 more
openaire   +2 more sources

Design of Three Phase Load Unbalance Automatic Regulating System for Low Voltage Power Distribution Grids

MATEC Web of Conferences, 2018
In the three-phase four wire system of the low voltage side for the distribution grid, the phenomenon of asymmetrical and uneven single phase load were very common, causing unbalance in certain network.
Li Yongxia, Gong Yulei
doaj   +1 more source

Adaptive Volt–Var Control in Smart PV Inverter for Mitigating Voltage Unbalance at PCC Using Multiagent Deep Reinforcement Learning

Applied Sciences, 2021
Modern distribution networks face an increasing number of challenges in maintaining balanced grid voltages because of the rapid increase in single-phase distributed generators.
Yoongun Jung, Changhee Han, Dongwon Lee, Sungyoon Song, Gilsoo Jang   +4 more
doaj   +1 more source

Influence of grid configuration on current conducting behaviour in PV installations [PDF]

, 2011
On the roof of an industrial site a 385 kWp PhotoVoltaic installation is operational. When production of this system reaches 60% of the installed power, the circuit breaker trips.
Debruyne, Colin, Desmet, Jan, Vandevelde, Lieven, Verhelst, Bart   +3 more
core   +2 more sources

Control strategy of clustered micro‐grids for grid voltage unbalance compensation without communications

IET Generation, Transmission & Distribution, 2020
Grid‐connected converters are expected to provide ancillary service utilising their spare capacities during operation. This study proposes a novel control strategy for clustered micro‐grids to compensate voltage‐unbalance of the power grid at the point of common coupling.
Baoquan Liu, Xuguang Zhao, Yan Liu, Yixin Zhu, Jingwen Chen   +4 more
openaire   +1 more source

Adjustable unbalanced current controller for tranformerless PV generation to suppress DC voltage ripples of inverter in low‐voltage ride‐through (LVRT) operation

IET Renewable Power Generation, 2022
Low voltage ride‐trough (LVRT) feature is compulsory for each grid‐connected inverter to support the grid by injecting reactive power in low voltage conditions.
Afshin Kadri, Reza Ebrahimi, Edris Pouresmaeil   +2 more
doaj   +1 more source

Development of a Novel Control Scheme to Achieve the Minimum Unbalance Factor and Real Power Fluctuations under Asymmetrical Faults

Energies, 2023
The increasing share of converter-based renewable energy sources in the power system has forced the system operators to demand voltage support from the converters in case of faults.
Muhammad Abubakar, Herwig Renner, Robert Schürhuber   +2 more
doaj   +1 more source

Optimization method of power supply mode and connected to external power grid of CZ railway traction station

Energy Reports, 2023
Aiming at the problem of long slopes and weak power grids along the railway in high altitude mountainous areas, an optimization method of power supply mode and access to external power grid of CZ railway traction station is proposed. First, combined with
Yunling Wang, Jiawei Liu, Jing Gou, Qiao Zhang, Wenhao Sun, Zhigang Liu   +5 more
doaj   +1 more source

The Performance of a Three-Phase Induction Motor under and over Unbalance Voltage [PDF]

Tikrit Journal of Engineering Sciences, 2021
Voltage unbalance is an adverse global phenomenon impacting three-phase induction motor output. Three-phase source voltage may become imbalanced in a variety of respects, while a balanced system preserves stable voltage magnitude and angles in ...
Abdulsatar H. Jassim, Arkan A. Hussein, Laith F. Abbas   +2 more
doaj   +1 more source

Study on the influence of three-phase voltage unbalance on electromagnetic performance and vibration of high-voltage line-start permanent magnet synchronous motor [PDF]

Archives of Electrical Engineering
Since the operation of the high-voltage line-start permanent magnet synchronous motor (HVLSPMSM) does not need the control circuit and is directly powered by the grid, its operating stability is easily affected by the three-phase voltage unbalance. Thus,
Cunxiang Yang, Jichao Jia, Jianing Liang, Zhenjiang Wang, Hongbo Qiu   +4 more
doaj   +1 more source