Resonant Wireless Charging System Design for 110-kV High-Voltage Transmission Line Monitoring Equipment

Cai, Changsong; Wang, Junhua; Liu, Rong; Fang, Zhijian; Zhang, Pengcheng; Long, Mengjiao; Guo, Kang-Xian; Lin, Zhongzheng

doi:10.1109/tie.2018.2808904

Cited by 95 publications

(26 citation statements)

References 21 publications

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“…Equations (4) and (5) show that the variation of the equivalent load resistance R L influences I 1 and the power transmitted to the load is equal to the power consumed by the real part of the impedance Z p . Therefore Z p has a link with the active power P 0 of the circuit.…”

Section: Mutual Inductance Modelmentioning

confidence: 99%

“…Wireless power transfer (WPT) technology has become one of the critical technology applications in the fields of transportation [1,2], underwater power supplies [3], biomedical implants [4], highvoltage transmission [5] and electric vehicles (EVs) [6,7]. In particular, the electric bike (EB) is in common use in many regions including China and Europe [8].…”

Section: Introductionmentioning

confidence: 99%

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Three‐coil structure‐based WPT system design for electric bike CC and CV charging without communication

Liu

Yang

2019

IET Electric Power Applications

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In comparison with the traditional plug-in charging systems for the electric bike (EB), wireless power transfer (WPT) systems have superior advantages of convenience and safety. Combining the application requirement range of the EB, this study proposes a three-coil structure-based WPT system in order to achieve ideal and reliable constant current (CC) output and constant voltage (CV) output without the need for a sophisticated control strategy and the real-time communication links between the transmitter and receiver sides. Two ac switches are utilised at the transmitter side to implement the change of charging mode from CC to CV. By correctly selecting the parameters of compensation components, the required loadindependent CC and CV characteristics with zero phase angle in the CC and CV modes can be achieved. Besides this, a load identification method based on the active power calculation used to estimate the equivalent resistance of the battery in the whole charging process, is utilised to judge the switching point from CC to CV mode. Finally, the feasibility of the method is verified through the construction of a laboratory platform with a 3.3 A charging current and a 57 V charging voltage.

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Section: Mutual Inductance Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Three‐coil structure‐based WPT system design for electric bike CC and CV charging without communication

Liu

Yang

2019

IET Electric Power Applications

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“…The diameter and weight of coupling coils should be decreased to reduce the impact on the insulators. The 24-turn and 20 cm radius helix windings are adopted in the desired WPT system to balance the size and capacity [14]. The transmission distance of desired WPT systems is three times longer than the diameter of coils, and the coupling between transmitting and receiving coils is extremely loose.…”

Section: System Overviewmentioning

confidence: 99%

Extended efficiency control method for WPT systems in smart grid under loose coupling extremes

Wang

Cai

et al. 2019

IET Power Electronics

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This study presents an extended efficiency control method with resonant frequency tracking, load optimisation and output voltage regulation of extremely loosely coupled wireless power transfer (WPT) systems for smart grid applications. Adaptive resonant frequency tracking of this specified system is proposed and implemented to achieve a robust and efficient transmission efficiency with fast searching and less fluctuation. Automatic load optimisation of the system with the required output is realised to further improve the efficiency by adjusting the phase-shift angle of the converter on the transmitter side. Owing to a receiving feedback circuit, the proposed system does not require any communication which is suited for operating under high-voltage insulation conditions. Input current from source is the only parameter to be sensed for the proposed strategy of extended efficiency control, which makes the method cost-effective and work-robust even in the harsh environments. Experimental results prove the feasibility of the extended efficiency control method, which can be used in wireless powered devices in a smart grid or other extremely loosely coupled WPT systems.

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“…are all known, the cross-sectional area of the core can then be calculated according to (13). Parameters of the core are defined as follows: the crosssectional perimeter is L 1 , the average length of magnetic circuit is L m , the cross-sectional width is b, the cross-sectional internal radius is r. On the basis, the detailed relationship among these parameters can be written as…”

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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Resonant Wireless Charging System Design for 110-kV High-Voltage Transmission Line Monitoring Equipment

Cited by 95 publications

References 21 publications

Three‐coil structure‐based WPT system design for electric bike CC and CV charging without communication

Three‐coil structure‐based WPT system design for electric bike CC and CV charging without communication

Extended efficiency control method for WPT systems in smart grid under loose coupling extremes

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

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