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Direct-current change-over switch suitable for offshore wind power

A technology of DC conversion and offshore wind power, which is applied in the direction of switchgear, switchgear setting, power transmission AC network, etc. It can solve the problems of being unsuitable for complex offshore environments, low integration level, and exposed overhead lines, etc., to achieve effective implementation. Monitoring, high degree of integration, and convenient operation and maintenance

Active Publication Date: 2021-04-09
PINGGAO GRP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a DC transfer switch suitable for offshore wind power, so as to solve the problem that the high-voltage DC transfer switch in the prior art is assembled with open discrete components due to its low degree of integration and exposed overhead wires, which is not suitable for complex offshore applications. environmental technical issues

Method used

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  • Direct-current change-over switch suitable for offshore wind power
  • Direct-current change-over switch suitable for offshore wind power
  • Direct-current change-over switch suitable for offshore wind power

Examples

Experimental program
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Effect test

specific Embodiment 1

[0044] like Figure 1 to Figure 3 As shown, the DC transfer switch in this embodiment has a high degree of integration, and the entire DC transfer switch is transformed into a gas-insulated metal-enclosed DC transfer switch by adopting a metal-enclosed tube-bus structure, which not only has a small overall volume, but also can be Effectively reduce external environmental interference, suitable for use in complex marine environments.

[0045] Specifically, the DC transfer switch in this embodiment includes a circuit breaker breaking device 1 , a capacitor 12 and a resistance structure 2 , and the circuit breaker breaking device 1 , the capacitor 12 and the resistance structure 2 are arranged in parallel through the metal tube parent structure to ensure DC normal operation of the transfer switch.

[0046] Among them, the circuit breaker breaking device 1 is used to switch the DC transfer switch from the on state to the off state. The circuit breaker breaking device 1 specifical...

specific Embodiment 2

[0066] The main difference between it and Example 1 is that: in Example 1, the circuit breaker breaking device, capacitor and corresponding pipeline are all manufactured by the manufacturer, and they are transported to the sea and then assembled. In this embodiment, a base can be made directly at the manufacturer, and the base is used to be fixedly installed on the corresponding base. The above-mentioned circuit breaker breaking device and capacitor are all fixedly installed on the base, and then the base can be directly installed at the manufacturer. Assemble the DC transfer switch. The assembly method in this embodiment is suitable for applying to a DC transfer switch with a small voltage level and a small size.

specific Embodiment 3

[0068] The main difference from Embodiment 1 is that in Embodiment 1, both the incoming line pipeline and the outgoing line pipeline extend vertically, the resistance structure is located on the circuit breaker breaking device, and the installation is convenient. In this embodiment, the incoming line pipeline and part of the outgoing line pipeline are arranged horizontally. At this time, the resistance structure can be located on the horizontal side of the circuit breaker breaking device. Under this assembly structure, the center of the entire DC transfer switch Lower, better seismic performance.

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Abstract

The invention relates to a direct-current change-over switch suitable for offshore wind power. The direct-current change-over switch comprises a circuit breaker switching-on and switching-off device, a wire inlet pipeline and a wire outlet pipeline. A capacitor is connected with the circuit breaker switching-on and switching-off device in parallel through an inlet wire leading-out pipeline and an outlet wire leading-out pipeline; the wire inlet pipeline, the wire outlet pipeline, the inlet wire leading-out pipeline and the outlet wire leading-out pipeline are all of a metal closed tubular bus structure. A resistor structure comprises a metal tank body, a nonlinear resistor is arranged in the metal tank body, and the nonlinear resistor and the circuit breaker switching-on and switching-off device are arranged in parallel; and the circuit breaker switching-on and switching-off device, the metal tank body and the metal closed tubular bus structure are filled with insulating gas, so that the direct-current change-over switch forms a gas-insulated metal closed direct-current change-over switch. The direct-current change-over switch is converted into a gas-insulated metal-enclosed direct-current change-over switch, is high in integration degree, is not influenced by heavy salt pollution, high humidity and high temperature environments outside the sea, and is suitable for meeting the use requirements of complex environments.

Description

technical field [0001] The invention belongs to the technical field of direct current transmission, and in particular relates to a direct current conversion switch suitable for offshore wind power. Background technique [0002] With the development of high-voltage direct current transmission technology, high-voltage direct current transmission is widely used in power transmission projects. Among them, the HVDC switch is an important equipment in the DC transmission system. The main function of the DC transfer switch is to change the operation mode of the DC system, or to clear the faults on the DC side. [0003] Most of the existing DC transfer switches are composed of as many as the DC transfer switch disclosed in the Chinese utility model patent with the authorized announcement number CN205283110U, which includes a circuit breaker circuit, an oscillating circuit and a non-linear resistor connected in parallel, wherein the circuit breaker The breaker circuit includes a ci...

Claims

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Application Information

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IPC IPC(8): H02B13/035H02J3/36
CPCH02B13/035H02J3/36Y02E60/60
Inventor 钟建英孙珂珂魏建巍林麟谭盛武程丽华段晓辉梁利艳孙英杰门博王向克胡延涛张利欣熊萍萍姚文彬贺永明李全和范艳艳苑国旗雷建召
Owner PINGGAO GRP