Magnetically-coupled resonant wireless power transfer (MCR-WPT) has been a research focus in recent years. Multiple transmitters are employed to improve efficiency in a wide area. In this paper, the MCR-WPT system wit...
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ISBN:
(纸本)9781479988068
Magnetically-coupled resonant wireless power transfer (MCR-WPT) has been a research focus in recent years. Multiple transmitters are employed to improve efficiency in a wide area. In this paper, the MCR-WPT system with two transmitters supplied by the same source is modeled and its equivalent circuit is depicted. The mutual inductance between the two transmitters is considered. Proper connection of the transmitters results in the enhancement of the magnetic field in certain areas. Based on the circuit theory, the explicit expression of the efficiency is derived. The quasi-uniform magnetic field and roughly equal efficiency are analyzed.
Because the fault characteristics is not obvious, the high resistance grounding fault feeder selection in a resonant grounding system has always been a hot and difficult problem in the field of power system protection...
ISBN:
(数字)9781839531248
ISBN:
(纸本)9781839531255
Because the fault characteristics is not obvious, the high resistance grounding fault feeder selection in a resonant grounding system has always been a hot and difficult problem in the field of power system protection. To solve this problem, the expressions of the transient zero sequence current of each feeder under over-damping and under-damping conditions are obtained based on the transient equivalent circuit of high resistance grounding fault in a resonant grounding system. The correlation degree of the transient zero sequence current between any two feeders is analysed by using the correlation coefficient method, so as to realize the fault feeder selection for high resistance grounding fault. simulation results of PSCAD software show that this method is not affected by transition resistance, initial phase angle of fault, and has high accuracy and reliability.
The non-inverting buck boost (NIBB) converter has attracted significant attention in recent years, as it shares ground between input and output, and the voltage stress of switches is lower. In order to investigate the...
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Distributed Energy Resources(DERs) will be an important part of the future power system under the spread of distributed renewable energy generation, electric vehicles, demand response and other technologies. Cyber-phy...
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The battery differences not only affect the reliability and security of battery packs but also accelerate the decline of the packs' life. Although battery management systems (BMS) and equalization circuit can be u...
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In this paper, a dynamic droop mechanism is proposed to damp the synchronizing oscillation that exists in a virtual synchronous generator based distributed generator system without varying the steady-state active-powe...
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Multi-mode oscillation (MMO) is more prone to happen in the offshore wind farm (OWF) than the onshore, which seriously impacts the safe operation of the system. In this paper, the mechanism for the MMO of the OWF is a...
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Silicone rubber (SIR) has been widely used in the insulation of cable accessories due to its excellent performance. In this paper, pure SIR and nano Al2O3/SIR composites are thermally aged for 0-80 days at 200°C....
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In order to reduce the randomness and fluctuation of wind power, numerical weather prediction is usually used to forecast powergeneration. Due to the redundancy of numerical weather prediction factors, dimensionality...
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