High-voltage side wireless power supply device for active electronic mutual transformer

Abstract

The invention discloses a high-voltage side wireless power supply device for an active electronic mutual transformer. The high-voltage side wireless power supply device for an active electronic mutualtransformer comprises a wireless power supply (2), an emission device (3), a receiving device (4), a charging control circuit (5) and an energy storage battery (6). In the device, the energy storagebattery (6) is used for directly supplying power to a high-voltage side power utilization module (7), the wireless power supply (2) is used as an energy supplement device, and the energy storage battery (6) is charged by the wireless power supply (2) during the normal power supply process of the energy storage battery (6) when a battery voltage is reduced to a discharging cutoff voltage, and the wireless power supply (2) stops charging the energy storage battery (6) when the battery voltage is raised to a charging limitation voltage. By the device, interruptible, long-term and wireless power supply to a high-voltage side power utilization module (8) can be achieved, and the device has important significance to development of the active electronic mutual transformer.

Description

technical field [0001] The present application relates to the technical field of transformer power supply, in particular to an active electronic transformer high-voltage side power supply device. Background technique [0002] The transformer in the power system is used for power metering and relay protection, and plays an important role in the connection between the primary equipment and the secondary equipment. The electronic transformer is the development trend of the transformer, and the electronic transformer is divided into active type and passive type. The active type uses optical fiber to transmit the signal from the high-voltage side to the low-voltage side. On the high-voltage side, the analog signal is collected through a traditional transformer. A conversion circuit that can convert the analog signal into a digital signal is required, so the conversion circuit must be powered on the high-voltage side. The power supply, but this power supply cannot be directly con...

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Problems solved by technology

[0004] There are the following problems in the power supply of the high-voltage bus: due to the great difference in the power load in different time periods, the change of the bus current is also great

When the current is very small, there will be a dead zone, resulting in the failure of normal power supply, and when the fault current of the system is too large, it must be ensured that the excess energy can be absorbed so that it will not be damaged by overvoltage

[0005] The laser power supply method requires a large driving current during power supply, which leads to an increase in the temperature of key components, a reduction in working life, and a serious impact on long-term reliable work.

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