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Control time sequence of cascade full-bridge direct-current circuit breaker control system

A DC circuit breaker and control system technology, applied in the direction of emergency protection circuit devices, electrical components, etc., can solve problems such as damage and rise of converter valve equipment

Active Publication Date: 2015-05-20
STATE GRID CORP OF CHINA +2
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] When a bipolar short circuit occurs on the DC side of the flexible DC transmission line, the DC current rises rapidly, and the current rise rate is as high as 3kA / ms, and the rise of the short-circuit current cannot be effectively prevented by the flexible DC converter valve itself. If no effective measures are taken, it will Cause damage to diverter valve equipment

Method used

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  • Control time sequence of cascade full-bridge direct-current circuit breaker control system
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  • Control time sequence of cascade full-bridge direct-current circuit breaker control system

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Embodiment Construction

[0037] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0038] In order to thoroughly understand the embodiments of the present invention, the detailed structure will be set forth in the following description. Obviously, the practice of the embodiments of the invention is not limited to specific details familiar to those skilled in the art. Preferred embodiments of the present invention are described in detail below, however, the present invention may have other embodiments besides these detailed descriptions.

[0039] refer to Figure 1 to Figure 5 , figure 1 It is a control sequence flow chart of the cascaded full-bridge DC circuit breaker control system of the present invention. The cascaded full-bridge DC circuit breaker control system includes the following tasks: detection of DC line current, commutation circuit current, and interruption circuit current. The detecti...

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Abstract

The invention discloses a control time sequence of a cascade full-bridge direct-current circuit breaker control system. A time sequence logic and control algorithm for control and fault monitoring can be provided according to the functional requirement of the cascade full-bridge circuit breaker and according to the control requirement of the circuit breaker and the coordination relation of all parts of the circuit breaker. By adopting the control time sequence logic, the short-circuit fault on the direct-current circuit can be rapidly responded, the action of the circuit breaker is controlled, and the requirement for rapidness of the direct-current circuit breaker can be met; main tasks of the cascade full-bridge high-voltage direct-current circuit breaker control protection device are summarized, the time sequence of each task is designed according to the control requirement of the cascade full-bridge direct-current circuit breaker, all tasks are connected with one another, and the control of the circuit breaker is completed; according to the control time sequence of the cascade full-bridge direct-current circuit breaker, the fault of each part of the circuit breaker can be discovered in a short time, and an appropriate measures can be taken.

Description

technical field [0001] The invention relates to a sequence logic of a power electronic device, in particular to a control sequence of a cascaded full-bridge DC circuit breaker. Background technique [0002] With the development of high-voltage and high-current semiconductor devices and power electronics technology, high-voltage DC transmission technology, flexible DC transmission technology, and DC grid technology have received more and more attention and applications. When a bipolar short circuit occurs on the DC side of the flexible DC transmission line, the DC current rises rapidly, and the current rise rate is as high as 3kA / ms, and the rise of the short-circuit current cannot be effectively prevented by the flexible DC converter valve itself. If no effective measures are taken, it will Cause damage to the diverter valve equipment. The HVDC circuit breaker for flexible DC transmission equipment can cut off the fault current in a short time, isolate the fault, and protec...

Claims

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Application Information

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IPC IPC(8): H02H7/26
Inventor 魏晓光汤广福高阳杨兵建客金坤
Owner STATE GRID CORP OF CHINA
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