Seabed high-voltage power converter module redundancy switching method and system

A technology of power converter and high-voltage power supply, which is applied in the field of submarine high-voltage power converter module redundancy switching method and system, can solve the problems of high system volume and cost, save cost and space, reduce peak discharge current, reliable discharge and The effect of cutting bypass

CN113054737APending Publication Date: 2021-06-29O&C ELECTRIC TECHN CO LTD
0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-06-29

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a seabed high-voltage power converter module redundancy switching method and switching system, belongs to the technical field of seabed power supplies, and is used for solving the technical problems that the existing seabed power supply redundancy is high in cost and needs redundancy. The method comprises a non-stop switching method and a stop switching method. The non-stop switching method comprises the following steps of: judging whether a module has a fault or not; and when judging that the module has a fault, discharging the module which has a fault and needs to be removed, and when the module is discharged to the preset voltage, bypassing the module which breaks down has a fault, and enabling other modules to operate normally without shutdown. The shutdown switching method comprises the following steps of: judging whether a module breaks down or not; when judging that the module breaks down, controlling a high-voltage power supply converter to be shut down, discharging the module which breaks down, when the module is discharged to the preset voltage, bypassing the module with the fault, and then starting the high-voltage power supply converter. The seabed high-voltage power converter module redundancy switching method has the advantages of being lower in cost, capable of achieving redundancy switching without shutdown, high in reliability and the like.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention mainly relates to the technical field of submarine power supplies, and in particular to a method and system for switching redundancy of submarine high-voltage power supply converter modules. Background technique

[0002] For long-distance transmission in the ocean and other fields, the transmission voltage is very high, and power conversion equipment that converts high voltage to low voltage is required at the load end, and the safety performance of the power conversion equipment is required to be very high. It is generally necessary to perform redundant backup (automatic or manual) on the entire power supply; however, in the prior art, when performing redundant backup, it needs to be shut down and powered off for operation, and the volume and cost of the entire system are higher. Contents of the invention

[0003] The technical problem to be solved by the present invention is that: aiming at the problems existing in the prior art, the ...

Examples

Embodiment 1

[0033] Such as figure 1 As shown, the redundancy switching method of the submarine high-voltage power converter module in this embodiment belongs to the non-stop switching method, and the specific steps are:

[0034] Judging whether the subsea high-voltage power converter module (such as DC-DC conversion module) is faulty;

[0035] When it is judged that a module is faulty, discharge the faulty module that needs to be removed. When the discharge reaches the preset voltage, the faulty module will be bypassed and removed. Other modules will work normally without stopping to ensure the power converter. Continuous output without shutdown under module failure.

[0036] The redundant switching method of the subsea high-voltage power converter module of the present invention does not need to back up the entire power converter, and only needs to perform redundant operations through each module, which greatly saves cost and space; at the same time, the above redundant switching method...

Embodiment 2

[0057] Such as figure 2 As shown, the redundancy switching method of the submarine high-voltage power converter module in this embodiment belongs to the shutdown switching method, and is applied to a specific scenario where the power supply requirement is not too high. The specific steps are:

[0058] Determine whether the subsea high-voltage power converter module is faulty;

[0059] When it is judged that a module is faulty, the high-voltage power converter is controlled to stop, and the faulty module is discharged. When the discharge reaches the preset voltage, the faulty module is bypassed, and then the high-voltage power converter is started.

[0060] Other contents not described are the same as those in Embodiment 1, and will not be repeated here.

[0061] The present invention correspondingly discloses a redundant switching system of a submarine high-voltage power converter module, including

[0062] The second detection module is used to determine whether the subsea...