Results 11 to 20 of about 3,140 (255)

Adaptive Grid Impedance Shaping Approach Applied for Grid-Forming Power Converters

IEEE Access, 2022
This paper proposes an adaptive grid impedance shaping approach, implemented through a variable structure virtual impedance control strategy (VS-VIS), to improve the power flow control of grid-forming power converters (GF-PC).
Ricardo Lucio de Araujo Ribeiro, Arman Oshnoei, Amjad Anvari-Moghaddam, Frede Blaabjerg   +3 more
doaj   +1 more source

Power Equalization Strategy Based on Adaptive Virtual Impedance

Journal of Physics: Conference Series, 2023
Abstract Due to the differences in the line resistance of each distributed generation unit, conventional sag control does not allow for precise distribution of power, which also reduces the problem of system reactive power accuracy. To address this problem, this paper analyzes the power equalization and distribution conditions.
Xiong Lv, Baoge Zhang, Hao Tian, Yongquan Ren, Fuhong Cui   +4 more
openaire   +1 more source

Adaptive Impedance-Conditioned Phase-Locked Loop for the VSC Converter Connected to Weak Grid

Energies, 2021
In this paper, an adaptive version of the impedance-conditioned phase-locked loop (IC-PLL), namely the adaptive IC-PLL (AIC-PLL), is proposed. The IC-PLL has recently been proposed to address the issue of synchronisation with a weak AC grid by ...
Mostafa A. Hamood, Ognjen Marjanovic, Joaquin Carrasco   +2 more
doaj   +1 more source

Microgrid operation improvement by adaptive virtual impedance [PDF]

IET Renewable Power Generation, 2018
Microgrids (MGs) are regarded as the best solution for optimal integration of the renewable energy sources into power systems. However, novel control strategies should be developed because of the distinct inherent feature of MG components in comparison to conventional power systems.
Eskandari, M, Li, L
openaire   +2 more sources

Adaptive Virtual Flux Droop Control Based on Virtual Impedance in Islanded AC Microgrids [PDF]

IEEE Journal of Emerging and Selected Topics in Power Electronics, 2022
Virtual flux droop (VFD) method is a scheme, in which, instead of frequency and voltage amplitude, the phase angle and amplitude of the virtual flux are, respectively, adjusted to active and reactive power sharing. However, mismatched line impedances lead to improper power sharing.
Saheb Khanabdal, Mahdi Banejad, Frede Blaabjerg, Nasser Hosseinzadeh   +3 more
openaire   +1 more source

Adaptive Droop Control Using Adaptive Virtual Impedance for Microgrids With Variable PV Outputs and Load Demands [PDF]

IEEE Transactions on Industrial Electronics, 2021
In microgrids, intermittency of renewable energy sources (RES) and uncertain state-of-charge (SoC) of energy storage systems (ESS) can cause power deficiency to some distributed generation units (DGs). In this case, DGs with power deficiency may not meet the power demand, resulting in voltage collapse or frequency divergence.
Zilin Li, Ka Wing Chan, Jiefeng Hu, Josep M. Guerrero   +3 more
openaire   +1 more source

Adaptive control strategy of solid state transformer with fast dynamic response and enhanced balance performance

IET Power Electronics, 2022
Solid state transformer (SST) is designed as a power transmission device between AC grids and DC grids. However, the power fluctuation causes unbalanced power sharing among dual active bridge (DAB) converters and large voltage fluctuations on dc buses ...
Zhi Liu, Shuaihu Li, Fan Xiao, Tingting Wang, Yijia Cao, Yong Li, Xizhuo Zhang   +6 more
doaj   +1 more source

Stability analysis of doubly-fed wind generation systems under weak power grid based on virtual synchronous control combined with adaptive robust control

Energy Reports, 2022
Doubly-fed induction generator (DFIG) of wind generation system is generally located at the end of the distribution power-grid. Under the weak power grid, the grid connection of wind turbines is unstable, and the current quality is poor.
Zhaoyan Zhang, Yong Zhuang, Xianbao Zha, Kun Zhang, Peiguang Wang, Shaoke Wang, Shuai Liu   +6 more
doaj   +1 more source

Adaptive Virtual Impedance Droop Control Based on Consensus Control of Reactive Current

Energies, 2018
It is difficult to achieve accurate distribution of reactive power based on conventional droop control due to the line impedance mismatch in an islanded microgrid.
Zhilin Lyu, Qing Wei, Yiyi Zhang, Junhui Zhao, Emad Manla   +4 more
doaj   +1 more source

Active Training Control Method for Rehabilitation Robot Based on Fuzzy Adaptive Impedance Adjustment

Machines, 2023
For lower limb rehabilitation robots, different patients or patients in different rehabilitation stages have different motion abilities, and the parameters of the traditional impedance control model are fixed and cannot achieve the best active suppleness
Jie Hu, Yuantao Zhuang, Qiaoling Meng, Hongliu Yu   +3 more
doaj   +1 more source