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Design and Development of a Class EF2 Inverter and Rectifier for Multi-megahertz Wireless Power Transfer Systems [PDF]

, 2016
This paper presents the design and implementation of a Class EF2 inverter and Class EF2 rectifier for two -W wireless power transfer (WPT) systems, one operating at 6.78 MHz and the other at 27.12 MHz.
Aldhaher, S, Mitcheson, PD, Yates, DC
core   +1 more source

Utility harmonic impedance estimation based on time series clustering and improved Pettitt method

International Journal of Electrical Power & Energy Systems
Utility harmonic impedance estimation is critical for power quality assessment and improvement. Noninvasive methods without injecting harmonics are widely adopted to estimate utility harmonic impedance using natural load variations.
Wentao Li, Shunliang Wang, Hao Tu, Hong Miao, Ning Jiao, Tianqi Liu   +5 more
doaj   +1 more source

A Method for Utility Harmonic Impedance Estimation Based on Constrained Complex Independent Component Analysis

Energies, 2018
Utility harmonic impedance is an important parameter for harmonic mitigation. In this paper, a method for utility harmonic impedance estimation method based on constrained independent component analysis is proposed.
Xianyong Xiao, Xian Zheng, Ying Wang, Shuangting Xu, Zixuan Zheng   +4 more
doaj   +1 more source

Bidirectional Harmonic Current Control of Brushless Doubly Fed Motor Drive System Based on a Fractional Unidirectional Converter Under a Weak Grid

IEEE Access, 2021
The brushless doubly fed machine (BDFM) drive system based on a fractional unidirectional converter is a promising low-cost variable-speed drive system, which shows great potential in applications of driving fans and pumps.
Zhenping Li, Xuefan Wang, Ming Kong, Xi Chen   +3 more
doaj   +1 more source

Wide-Band Harmonic Impedance Measurement Device for Wind Grid Based on Cascaded H-Bridge Converter

Zhongguo dianli, 2022
In wind power generation, the coupling of the wind farm power pooling system with the grid may cause high frequency resonance problems and affect the power quality of the grid.
Yongjun YU, Liguo XU, Zijie LIN, Binghan SUN, Qiujiang LIU, Zhensheng WU, Zhijie REN   +6 more
doaj   +1 more source

A Composite Strategy for Harmonic Compensation in Standalone Inverter Based on Linear Active Disturbance Rejection Control

Energies, 2019
This paper proposes a harmonic compensation control with disturbance rejection function for a standalone inverter. Due to the LC type three-phase three-leg inverter is connected to nonlinear loads, low-order harmonic components appears in the inverter ...
Hui Li, Yue Qu, Junwei Lu, Shuang Li
doaj   +1 more source

On the determination of the boundary impedance from the far field pattern

, 2009
We consider the Helmholtz equation in the half space and suggest two methods for determining the boundary impedance from knowledge of the far field pattern of the time-harmonic incident wave.
Godin, Yuri A., Vainberg, Boris
core   +1 more source

Assessment Method of Wind Farm Harmonic Emission Value Based on Improved Complex Linear Regression Model

MATEC Web of Conferences, 2017
Wind turbine filter and reactive power compensation devices lead to the harmonic impedance of wind farm is not much larger than that of the utility, so the influence by the wind farm harmonic impedance can not be neglected while assessing the harmonic ...
Chen Tiantian, Zhang Peng, Pan Ling, Tan Peng, Yang Honggen   +4 more
doaj   +1 more source

An Adaptive Hybrid Control of Grid Tied Inverter for the Reduction of Total Harmonic Distortion and Improvement of Robustness against Grid Impedance Variation

Energies, 2022
Background: Grid-tied inverters play an efficient role in the integration of renewable energy resources with utility grids. Motivation: However, the interconnection between power converters and the grid has been seen to be responsible for various ...
Tila Muhammad, Adnan Umar Khan, Muhammad Tajammal Chughtai, Reyyan Ahmad Khan, Yousra Abid, Muhammad Islam, Sheroz Khan   +6 more
doaj   +1 more source

Current coordinated distribution and voltage optimization control for multi-VSGs system considering nonlinear and negative sequence loads

Frontiers in Energy Research
In a microgrid system where multiple virtual synchronous generators (VSGs) are interconnected through high impedance cables, the total output negative sequence and harmonic current of multiple VSGs cannot be coordinated based on the capacity of each ...
Luyao Xie, Yu Zhang, Youbing Zhang, Yi Chen, Bo Wang   +4 more
doaj   +1 more source