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Direct-current circuit breaker and control method

A technology of a DC circuit breaker and a control method, which is applied in the direction of DC network circuit devices, circuits, circuit devices, etc., can solve the problems that DC circuit breakers cannot meet the technical and economical aspects.

Pending Publication Date: 2021-09-21
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the DC circuit breaker in the prior art is difficult to meet the technical and economic requirements, so as to provide a DC circuit breaker and its control method

Method used

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  • Direct-current circuit breaker and control method
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  • Direct-current circuit breaker and control method

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Embodiment Construction

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must hav...

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Abstract

The invention provides a direct-current circuit breaker and a control method. The direct-current circuit breaker comprises at least one circuit breaker module, wherein the circuit breaker module comprises a through-flow unit, an energy consumption unit, a controlled oscillation unit and a grounding unit, and the through-flow unit is connected in series in a power line; the controlled oscillation unit is connected with the through-flow unit in parallel; one end of the energy consumption unit is connected with one end of the through-flow unit and one end of the controlled oscillation unit respectively, and the other end of the energy consumption unit is connected with the controlled oscillation unit; and one end of the grounding unit is connected with the controlled oscillation unit, and the other end is grounded. According to the direct-current circuit breaker and the control method, the technical and economical dual requirements of large-scale direct-current power grid construction on the direct-current circuit breaker are met.

Description

technical field [0001] The invention relates to the field of power electronics, in particular to a DC circuit breaker and a control method. Background technique [0002] High-voltage DC circuit breaker is one of the core equipment for multi-terminal and DC grid construction, and its technical economy directly affects the flexibility and extensiveness of DC grid applications. At present, there are two main technical routes for HVDC circuit breakers: one is a hybrid DC circuit breaker, which is powered by a mechanical switch during normal operation, and uses an auxiliary commutation branch to transfer the current to the parallel-connected power electronic devices in the event of a fault. In the branch circuit, the current is broken by power electronic devices. This type of circuit breaker has low on-state loss and fast breaking speed, but needs to use a large number of fully controlled devices in series and parallel, and the cost is high. The other is the mechanical DC circui...

Claims

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Application Information

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IPC IPC(8): H02H7/26H02J1/00H01H9/54
CPCH02J1/00H02H7/268H01H9/54
Inventor 周万迪刘远魏晓光李弸智张升
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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