A Novel Electric Insulation String Structure With High-Voltage Insulation and Wireless Power Transfer Capabilities

Zhang, Cheng; Lin, D.; Tang, Niang; Hui, S. Y. Ron

doi:10.1109/tpel.2017.2706221

Cited by 104 publications

(23 citation statements)

References 17 publications

(19 reference statements)

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“…The original resonant frequency of each coil is set to 85 kHz. According to [17][18][19], parameters of each coil can be calculated. The resonant frequency of each coil, the self-inductance of each coil (L i ), the internal resistance of each coil (R i ), and the resonant capacitance of each coil (C i ) can be measured by an impedance analyzer.…”

Section: Methodsmentioning

confidence: 99%

Study of the Frequency Characteristic for a Magnetically Coupled Resonant Wireless Power Transmission System With Changes of the Capacitance

Li¹,

Yang²,

Huang³

et al. 2019

PIER M

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The resonant frequency of a magnetically coupled resonant wireless power transmission system is a core parameter that determines the performance of the system. However, how to obtain the variation law of the resonant frequency and the efficiency or output power of the system is still a difficult problem when the capacitance of each coil is changed. In this paper, a two-coil wireless power transmission system is taken as an object, and the expressions of the input impedance, frequency, efficiency, and output power are deduced. Based on these expressions, the relationships among frequency, efficiency, and output power are studied. It is concluded that there may be multiple resonant frequencies in s WPT system with the changes of capacitance. The system always features a maximum efficiency point and a maximum output power point. The frequencies of the two points are almost the same. These theories provide a feasible scheme for simultaneously achieving both a high efficiency and output power. Finally, a magnetically coupled resonant wireless power transmission system is designed and developed. Simulated and experimental results demonstrate the validity and correctness of the proposed method.

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Section: Methodsmentioning

confidence: 99%

Study of the Frequency Characteristic for a Magnetically Coupled Resonant Wireless Power Transmission System With Changes of the Capacitance

Li¹,

Yang²,

Huang³

et al. 2019

PIER M

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show abstract

“…are all known, corresponding parameters of the core can then be calculated according to (14). Finally, combined with the unloaded output voltage E ‫׳‬ 2 and the unloaded starting current I 1 , the secondary turns can be obtained through…”

Section: Analysis and Design Of Core And Coil Turnsmentioning

confidence: 99%

“…At present, more and more researchers begin to pay attention to the application of WPT technology to the energy supply of the online monitoring device for HVPLs, which solved some theoretical and practical problems [13][14][15]. Based on the research results, this study focuses on the optimisation design of online energy harvesting device and the WPT system with double relay coils by taking both HVPL insulation distance and wireless power supply efficiency into account.…”

Section: Introductionmentioning

confidence: 99%

Optimisation design of real‐time wireless power supply system overhead high‐voltage power line

Wang

Zhu

Wang

et al. 2018

IET Electric Power Applications

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Efficient and reliable power supply has been considered as the fundamentality of applying monitoring equipment overhead high-voltage power line (HVPL). Several kinds of energy harvesting devices are investigated and compared. A new power supply scheme, which integrates the online energy harvesting device and the wireless power transfer (WPT) system, is presented. Optimisation design of online energy harvesting device is analysed emphatically by taking both HVPL insulation distance and wireless power supply efficiency into account. For further increasing the harvested energy from power lines, this study discusses the design of specific device structure and the accurate calculation of maximum output power. It is found that essential parameters and exciting current angle contribute to more extracting energy. Meanwhile, in order to expand the transmitting distance with high efficiency, the WPT system with double relay coils is selected. The charging threshold voltage of the load can be further optimised under different transmitting distances by adopting an AC-DC voltage-doubling rectifier circuit. Simulation and experimental studies show that when the transmitting distance is >1 m, the monitoring equipment can also be charged in a reliable way, which also verifies the correctness and feasibility of the system.

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“…It is beneficial for power consumption equipment to be independent of the electric cables. The technology has been widely applied in the fields of consumer electronics [1], smart home [2], implant medical devices [3], electric vehicles [4], sensors in smart grid [5], rail transits [6] and drones. In [1], a 6.78 MHz resonant wireless power transfer (WPT) system with a 5 W fully integrated power receiver is introduced.…”

Section: Introductionmentioning

confidence: 99%

“…The advances in stationary and dynamic wireless charging of EVs are reviewed in [4]. The concept of the dominoresonator WPT system is applied in energy harvest from the ac magnetic field around the high-voltage cable to be transmitted wirelessly to power an online monitoring system in high-voltage transmission tower in [5]. The Design and fabrication of a 1-MW inductive power transfer system is proposed for a high-speed train in [6].…”

Section: Introductionmentioning

confidence: 99%

Flexible Power Control for Wireless Power Transmission System With Unfixed Receiver Position

Liu

Huang

Czarkowski³

et al. 2019

IEEE Access

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To improve the stability of receiving power in the wireless power transmission system with unfixed receiving position, a flexible power control strategy without the measurement in secondary side and the wireless communication between primary and secondary sides is proposed. The circuit model of a multiphase resonant inverter (MPRI) with cascaded intercell transformers (ICTs) is developed. The output voltage control strategy of the MPRI is introduced based on the iterative summation method for trigonometric functions. The circuit model of the system is derived to deduce the expressions for the key parameters. Considering the cascaded ICTs and the inductor-capacitor-capacitor (LCC) compensation circuit in the primary side, the design method of the compensation parameters is proposed based on the circuit model of the MPRI. After synthesizing the online monitoring, parameter pre-calculation, prediction of several conditions, and online learning, the flexible power control strategy is put forward for the wireless power transmission system with unfixed receiver position. Without the auxiliary positioning methods, the measurement in the secondary side, or the wireless communication between primary and secondary sides, the recognition of the load access and exit, as well as the power stabilization control after access, are realized. Finally, the theoretical analyses and the control strategy are validated by experiments. INDEX TERMS Wireless power transmission, multiphase resonant inverter, unfixed receiver position, power stabilization, flexible power control.

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A Novel Electric Insulation String Structure With High-Voltage Insulation and Wireless Power Transfer Capabilities

Cited by 104 publications

References 17 publications

Study of the Frequency Characteristic for a Magnetically Coupled Resonant Wireless Power Transmission System With Changes of the Capacitance

Study of the Frequency Characteristic for a Magnetically Coupled Resonant Wireless Power Transmission System With Changes of the Capacitance

Optimisation design of real‐time wireless power supply system overhead high‐voltage power line

Flexible Power Control for Wireless Power Transmission System With Unfixed Receiver Position

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