Results 281 to 290 of about 3,167,411 (345)

Improving Small-Signal Stability of Grid-Connected Inverter Under Weak Grid by Decoupling Phase-Lock Loop and Grid Impedance

IEEE transactions on industrial electronics (1982. Print), 2021
The wide bandwidth of phase-locked loop (PLL) will increase the negative real part of the output impedance of the grid-connected inverter (GCI), thus destroying the stability of the weak grids.
X. Lin, Jingrong Yu, Ruoxue Yu, Junhao Zhang, Zhongzong Yan, He Wen   +5 more
semanticscholar   +1 more source

Instability of Grid Connected Converter Under Weak AC Grid Conditions

2019 IEEE Transportation Electrification Conference and Expo (ITEC), 2019
Renewable energy sources like wind or hydrogen have been worked as a reliable option to traditional power sources. But for distributed power generation systems (DPGSs), the operation of the grid-connected converter under the weak ac grid condition has been a challenge for the stability and power quality issues.
Xinyue Zhang, Chen Liu, Rui Ma, Hao Bai, Franck Gechter, Fei Gao   +5 more
openaire   +1 more source

Stability Analysis and Robust Parameter Design of DC-Voltage Loop for Three-Phase Grid-Connected PV Inverter Under Weak Grid Condition

IEEE transactions on industrial electronics (1982. Print)
In the grid-connected inverter, both the phase-locked loop (PLL) and dc-voltage loop (DVL) can lead to the frequency coupling in the weak grid. Instabilities caused by PLL frequency coupling have been widely discussed. For DVL, past studies have analyzed
Jinming Xu, J. Zhong, Jiahua Kang, Wei Dong, Shaojun Xie   +4 more
semanticscholar   +1 more source

Impedance-Based Analysis of Control Interactions in Weak-Grid-Tied PMSG Wind Turbines

IEEE Journal on Emerging and Selected Topics in Circuits and Systems, 2021
The frequent oscillations in the weak-grid-tied permanent magnet synchronous generator (PMSG) wind farms can severely deteriorate the power system security.
Bin Liu, Zhen Li, Xi Zhang, Xiaoliang Dong, Xiangdong Liu   +4 more
semanticscholar   +1 more source

Regulator reconstruction strategy of grid-connected inverter in weak grid

2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia), 2016
In order to suppress LCL inherent resonance and grid background harmonic problems, virtual impedance control based on capacitor current feedback and grid voltage feedforward control strategies are typically introduced in grid-connected inverters. However, the inverter control strategy can't make the system operate stably in a weak grid.
null Qinglin Zhao, null Haopu Zhang, null Wenlu Song, null Xiaoyi Li, null Qiuxia Yang   +4 more
openaire   +1 more source

A Series Impedance Reshaping Control Method Considering PLL Dynamics for Grid-Connected Inverters Under Weak Grid Conditions

IEEE transactions on industrial electronics (1982. Print)
Grid-connected inverters are the key part in renewable energy power generation systems. Usually, phase-locked loop (PLL) is adopted in grid-connected inverters to achieve synchronization.
Bin Guo, Xin Zhang, Hao Ma, Yongheng Yang, Xiaoqiang Wang, Qingxin Tian, Sicong Jin   +6 more
semanticscholar   +1 more source

Synchronization Stability Analysis Under Ultra-Weak Grid Considering Reactive Current Dynamics

IEEE transactions on industrial electronics (1982. Print)
The synchronization stability of grid-following converter has attracted extensive attention. It has been reported that the transient synchronization behavior during a grid fault is dominated by the phase-locked loop (PLL), while the current loop is ...
Bin Hu, Ling Zhan, Subham S. Sahoo, Liang Chen, Heng Nian, F. Blaabjerg   +5 more
semanticscholar   +1 more source

Current-Oriented Phase-Locked Loop Method for Robust Control of Grid-Connected Converter in Extremely Weak Grid

IEEE transactions on power electronics
This letter presents a new phase-locked loop (PLL) control method for enhancing the synchronization stability of grid-following voltage-source converters in very weak grid conditions.
Ki-Hyun Kim, Shenghui Cui, Jae-Jung Jung
semanticscholar   +1 more source

Analysis and Design of PLL Less Current Control for Weak Grid-Tied LCL-Type Voltage Source Converter

IEEE Journal of Emerging and Selected Topics in Power Electronics, 2022
For a weak grid-tied $LCL$ -type converter, the conventional current control interacts with a phase-locked loop (PLL) through the voltage at the point of common coupling (PCC).
Suresh Maganti, N. P. Padhy
semanticscholar   +1 more source

A Multivariable Phase-Locked Loop-Integrated Controller for Enhanced Performance of Voltage Source Converters Under Weak Grid Conditions

IEEE transactions on industrial electronics (1982. Print), 2022
This article proposes a new control strategy in stationary frame to improve the operational robustness of voltage source converters (VSCs) under weak grid conditions.
S. M. Hoseinizadeh, H. Karimi, M. Karimi-Ghartemani, S. Ouni   +3 more
semanticscholar   +1 more source