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Water-bottom high-voltage direct current transmission system based on carrier energy extraction and feedback

A high-voltage direct current, power transmission system technology, applied in the direction of the direct current network circuit device, the direct current power input is converted into the direct current power output, the control/regulation system, etc., can solve the problems of complex structure, poor real-time performance, etc., to achieve low control cost and start-up time Short, avoid the effect of high-voltage DC energy extraction

Active Publication Date: 2019-04-23
HUNAN UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The control loop structure of most medium and short-distance underwater direct current transmission systems needs to be controllable both above water and underwater, with complex structures and poor real-time performance

Method used

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  • Water-bottom high-voltage direct current transmission system based on carrier energy extraction and feedback
  • Water-bottom high-voltage direct current transmission system based on carrier energy extraction and feedback
  • Water-bottom high-voltage direct current transmission system based on carrier energy extraction and feedback

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Embodiment Construction

[0021] figure 1 Shown is a structural block diagram of an underwater high-voltage direct current transmission system based on carrier energy harvesting and feedback used in the present invention, including water power supply circuits, underwater power transmission cables, underwater power supply circuits, auxiliary carrier power generation and The coupling circuit and the underwater auxiliary power supply receiving circuit, the underwater voltage feedback signal modulation and sending circuit of the carrier voltage signal feedback circuit part and the underwater signal receiving circuit, wherein:

[0022] The above-water power supply circuit is connected with the alternating current of the power grid and the underwater power transmission cable, and is used to convert the three-phase underwater into high-voltage direct current, and transmit it to the underwater equipment for use through the underwater power transmission cable.

[0023] The underwater power supply circuit is con...

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Abstract

The invention discloses a water-bottom high-voltage direct current transmission system based on carrier energy extraction and feedback. The system mainly comprises a direct current power transmissioncircuit, an auxiliary carrier power circuit and a carrier voltage signal feedback circuit. The direct current power transmission circuit performs transmission of electric energy from a water surface to a water bottom, the auxiliary carrier power circuit performs power assistance in the circuit at the water bottom, and the carrier voltage signal feedback circuit feeds back the output voltage at thewater bottom to a water source. The water-bottom high-voltage direct current transmission system achieves that the water bottom source separately assists in power supply and direct closed-loop control from the output voltage to the water source, and is good in timeliness, simple in starting process and high in reliability.

Description

technical field [0001] The invention relates to the field of medium and short-distance underwater direct current transmission, in particular to an underwater high-voltage direct current transmission system based on carrier energy harvesting and feedback. Background technique [0002] High-voltage direct current transmission has attracted the attention of underwater energy transfer due to its low line cost, no reactive power loss caused by inductive reactance and capacitive reactance, and no skin effect. At the same time, with the development of modularization and miniaturization of power electronic devices, high-power and high-efficiency high-voltage power electronic converters are increasingly used in medium and short-distance underwater direct current transmission. [0003] At present, the auxiliary power supply part of the medium and short-distance HVDC transmission system needs to directly obtain energy from the high-voltage transmission line. Due to the high input volta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/00H02M3/335
CPCH02J1/00H02M3/33569Y02E60/60
Inventor 罗安张浚坤何志兴刘阳管仁锋廖明园唐昱煊陈燕东徐千鸣
Owner HUNAN UNIV
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