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Voltage regulation and control type oscillation type direct current circuit breaker and control method thereof

A DC circuit breaker and voltage regulation technology, applied in circuit devices, emergency protection circuit devices, electrical components, etc., can solve the problems that DC circuit breakers are difficult to meet technical and economical aspects

Pending Publication Date: 2021-12-24
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 economical requirements, thereby providing a voltage-regulated oscillating DC circuit breaker and its control method

Method used

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  • Voltage regulation and control type oscillation type direct current circuit breaker and control method thereof
  • Voltage regulation and control type oscillation type direct current circuit breaker and control method thereof
  • Voltage regulation and control type oscillation type direct current circuit breaker and control method thereof

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Embodiment Construction

[0036] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0037] 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 drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, ...

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Abstract

The invention provides a voltage regulation and control type oscillation type direct current circuit breaker and a control method thereof, the circuit breaker comprises a through-flow branch, an energy consumption branch and an on-off branch, the through-flow branch is connected in series in a power line, the on-off branch is connected with the through-flow branch in parallel, one end of the energy consumption branch is connected with one end of the through-flow branch and one end of the on-off branch, and the other end of the energy consumption branch is connected with the on-off branch; and when the power line does not have a fault, the through-current branch conducts the direct current load current. When the power line breaks down, the on-off branch is controlled to oscillate and generate the oscillating current, and the amplitude of the oscillating current is continuously increased until the oscillating current which is equal to the amplitude of the fault current and opposite to the fault current in direction is generated, so that continuous on-off of the circuit breaker with maximum current for several times in a short time can be realized, and the flexibility and the availability rate of the circuit breaker are greatly improved. And 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 technical field of power electronics, in particular to a voltage-regulated oscillating DC circuit breaker and a control method thereof. 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 of high-voltage DC circuit breakers: one is a hybrid DC circuit breaker, which uses mechanical switches to conduct current during normal operation, and uses auxiliary commutation branches to transfer current to power electronic devices connected in parallel in case of failure. 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 it needs to use a large number of fully controlled devices connected in series and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/087H02H3/02H02H7/26
CPCH02H3/087H02H3/025H02H7/268
Inventor 李弸智魏晓光张升周万迪陈龙龙
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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