Photoelectric transmission isolation power supply

Abstract

The invention relates to a photoelectric transmission isolation power supply. The photoelectric transmission isolation power supply comprises a transmitting end unit, a light path straightener and a receiving end unit. The transmitting end unit is used for obtaining a power signal from an external power supply and converting the power signal into an optical signal. The optical path straightener isused for straightening optical signals and transmitting the straightened optical signals. And the receiving end unit is used for receiving the straightened optical signal, converting the optical signal into an electric signal and providing for a load. The transmitting end unit comprises an isolation transformer, a light-emitting source and an AC/DC light-emitting power management circuit which isused for carrying out AC/DC conversion and managing the light-emitting efficiency of the light-emitting source. The optical path collimator comprises a collimating mirror. The receiving end unit comprises a photoelectric converter and a DC/AC or DC/DC load management circuit used for carrying out DC-AC conversion or DC conversion and managing loads. The receiving end unit further comprises a communication module used for feeding back the working condition of the load to the input module. Light serves as an energy transmission medium, the transmission distance is long, the insulation withstandvoltage stress is high, and the advantages of being high in short-circuit resistance, safe and reliable in operation and the like are achieved.

Description

technical field [0001] The invention relates to a power supply device. Background technique [0002] On June 25, 2020, the Zhangbei 500kV flexible DC power grid test and demonstration project was successfully networked, which means that the DC UHV networking technology is becoming mature, and the large-scale networking of DC UHV lines is about to kick off. Immediately afterwards, the networking of DC 800kV and DC 1100kV UHV power grids will be promoted soon. According to the technical requirements of DC 800kV and DC 1100kV UHV power grids, UHV equipment has higher and higher requirements on the insulation withstand voltage stress of power supply equipment. Traditional isolated power supplies can no longer meet the insulation withstand voltage stress of UHV equipment. Requirements, this will become a step that restricts the progress of networking technology for DC 800kV and DC 1100kV UHV power grids. Therefore, in order to meet the insulation withstand voltage stress requir...

AI Technical Summary

Problems solved by technology

According to the technical requirements of DC 800kV and DC 1100kV UHV power grids, UHV equipment has higher and higher requirements on the insulation withstand voltage stress of power supply equipment. Traditional isolated power supplies can no longer meet the insulation withstand voltage stress of UHV equipment. Requirements, this will become a step that restricts the progress of networking technology for DC 800kV and DC 1100kV UHV power grids

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