Results 21 to 30 of about 628,326 (292)

Impedance Reshaping for Inherent Harmonics in PMSM Drives With Small DC-Link Capacitor [PDF]

IEEE Transactions on Power Electronics, 2022
Sharp LC resonance peak may enlarge inherent harmonics, dominant harmonics of the supply voltage generated by a three-phase diode rectifier, around the resonance frequency, which will intensify fluctuations of the DC-link voltage and grid currents in ...
Ren, Zekun, Ding, Dawei, Zhang, Guoqiang, Xu, Dianguo, Dragicevic, Tomislav, Mijatovic, Nenad, Wang, Gaolin   +6 more
core   +2 more sources

Adaptive Impedance Reshaping Strategy for SPMSM Operating With Tight Speed Regulation

IEEE Access
Ensuring the stability of cascaded systems with constant power loads (CPLs) remains a critical challenge due to their negative incremental input admittance at low frequencies, which induces instability—particularly at higher power levels.
Hossam Ibrahim, Mahmoud Elnaggar, Abdelmomen Mahgoub   +2 more
doaj   +2 more sources

Stability improvement for three-phase grid-connected converters through impedance reshaping in quadrature-axis [PDF]

IEEE Transactions on Power Electronics, 2017
Three-phase AC-DC and DC-AC power converters have been extensively employed as grid-interfaces in various applications, e.g., distributed generation and energy storage systems.
Li, Hongchang, Li, Xiaoqiang, Yi Tang, Jingyang Fang, Fang, Jingyang, Tang, Yi, Xiaoqiang Li, Hongchang Li   +7 more
core   +3 more sources

Machine-Learning-Enabled Hydrogel Biosensors for Wearable Health Monitoring [PDF]

Gels
Machine learning (ML) is reshaping the design and deployment of conductive hydrogel biosensors for wearable health monitoring by coupling material chemistry with scalable manufacturing and robust signal analytics. Persistent bottlenecks include hydration
Zhizhou Zhang
doaj   +2 more sources

Control-Loop-Based Impedance Enhancement of Grid-Tied Inverters for Harmonic Suppression: Principle and Implementation

Energies, 2018
To understand different control loops that have been proposed to improve the quality of current into grid from the perspective of output impedance, control-loop-based output impedance enhancement of grid-tied inverters for harmonic suppression is ...
Fei Wang, Lijun Zhang, Hui Guo, Xiayun Feng   +3 more
doaj   +2 more sources

Dynamic Grid Voltage-Based Impedance-Reshaped Control for the Stability Enhancement of Grid-Connected DC/AC Converter System under Bidirectional Power Flow

Energies, 2022
Considering the bidirectional three-phase DC/AC converter, it presents different impedance characteristics on AC side under different power flow directions, resulting in different stability margin.
Li Liu, Kun Wang, Fei Peng, Yanjun Tian, Yi Wang   +4 more
doaj   +2 more sources

Modified Passivity-Based Control for LCL-Filtered Grid-Tied Inverter with Output Admittance Reshaping

Journal of Control Science and Engineering, 2023
As a nonlinear control method, the Euler–Lagrange- (EL-) based passivity-based control (PBC) has been studied for grid-tied converters based on energy function to achieve better performance.
Han Wang, Gang Shi, Jianwen Zhang, Miao Zhu, Xu Cai   +4 more
doaj   +2 more sources

Harmonic resonance evaluation and suppression of railway power conditioner-network-train coupling system

International Journal of Electrical Power & Energy Systems
The coupling of railway power conditioner (RPC), network, and train will change the impedance characteristics of the existing traction power supply systems, which will lead to the unclear law of high-frequency harmonic resonance. This paper aims to study
Fan Zhong, Shaofeng Xie, You Peng, Hui Wang   +3 more
doaj   +2 more sources

Stability analysis and improvement based on virtual impedance for electrolytic capacitor‐less DC multi‐port converter

Energy Conversion and Economics
The DC multi‐port converter's applications are increasing owing to its favourable features, including variable control mode, high power density, and bi‐directional power supply.
Jiang Chen, Ying Xu, Jiantao Zhang, Can Li, Yang Zeng, Yuyang Li, Zhiguo Wei   +6 more
doaj   +2 more sources

A Decentralized Impedance Reshaping Strategy for Balanced, Unbalanced and Harmonic Power Sharing in Islanded Resistive Microgrids

IEEE Transactions on Sustainable Energy, 2021
In an islanded microgrid, the wire impedance mismatches among distributed generation (DG) units lead to inaccurate power sharing results, which influences the system's normal operation.
Deng F., Li X., Li Y., Yao W., Mattavelli P., Zhang X.   +5 more
core   +2 more sources