V2G (vehicle-to-grid) wireless bidirectional power transmission device based on low-frequency PWM rectifier

Abstract

The invention discloses a V2G (vehicle-to-grid) wireless bidirectional power transmission device based on a low-frequency PWM rectifier. The V2G wireless bidirectional power transmission device comprises a filtering and voltage-stabilizing capacitor, a first power switch, a second power switch, a third power switch, a fourth power switch, a first compensation capacitor, a first current sampling circuit, a first coupling coil, a second coupling coil, a second compensation capacitor, a fifth power switch, a sixth power switch, a seventh power switch, an eighth power switch, a second current sampling circuit, a load resistor, an inductive voltage detection coil, a signal acquisition and conditioning circuit, a digital-analog converter, a microprocessor and an electric power converter drive circuit. The V2G wireless bidirectional power transmission device has the advantages that wireless bidirectional power transmission is achieved, accurate measurement of inductive voltage of the coupling coils is guaranteed to meet system resonance requirements, and direct-current voltage with amplitude values changing as required are arranged at ports of a power supply side and a load side, so that power switch loss and device operating frequency are both reduced, and transmission efficiency and power are improved.

Description

technical field [0001] The invention belongs to the technical field of wireless power transmission, and in particular relates to an electromagnetic induction wireless power transmission device, specifically a V2G wireless power bidirectional transmission device based on a low-frequency PWM rectifier. Background technique [0002] The two-way interaction (V2G) between electric vehicles and the smart grid is an important part of the smart grid. The charging of electric vehicles by the grid can be realized through V2G technology, and the on-board batteries of electric vehicles with distributed energy storage characteristics can also Provide services such as peak regulation and reactive power compensation for the power grid. Compared with the traditional wired charging method, the wireless charging method has the characteristics of safety and convenience, and is the development trend of electric vehicle charging technology. According to the different power transmission methods,...

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Problems solved by technology

At present, there are no patents or other literature reports for such a V2G wireless energy bidirectional transmission device based on low-frequency PWM rectifiers.

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