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Hybrid high-voltage DC breaker and power unit thereof

A high-voltage DC, power unit technology, applied in emergency protection circuit devices, electrical components, circuit devices, etc. for limiting overcurrent/overvoltage, and can solve the loss of H-bridge modules, heat dissipation and life effects, large fault currents, etc. problems, to achieve the effect of low heat dissipation pressure, high reliability and long device life

Inactive Publication Date: 2016-12-14
PINGGAO GRP +3
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the DC circuit breaker breaks the fault current, the anti-parallel diode of the power device will bear a large fault current, which will affect the loss, heat dissipation and life of the H-bridge module.

Method used

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  • Hybrid high-voltage DC breaker and power unit thereof
  • Hybrid high-voltage DC breaker and power unit thereof

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Embodiment Construction

[0015] The invention proposes a hybrid high-voltage direct current circuit breaker and its power unit. The main improvement lies in that: on the basis of the H-bridge structure, the capacitor originally used to connect the two bridge arms in the H-bridge structure is changed to be connected with the two bridge arms. Wiring method for parallel connection. The present invention will be described in further detail below with reference to the accompanying drawings.

[0016] Hybrid HVDC circuit breaker power unit embodiment;

[0017] refer to figure 1 , each power unit includes three parallel branches, wherein the first branch includes a capacitor C, the second branch includes two anti-series fully controlled power devices D1 and D2, and the third branch includes two Anti-series fully controlled power devices D3 and D4. The parallel points of the three parallel branches are the input terminal and the output terminal of the power module of the transfer branch, which are marked as...

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Abstract

The invention relates to a hybrid high-voltage DC breaker and a power unit thereof. The hybrid high-voltage DC breaker is composed of a flow through branch and a transfer branch, the flow through branch comprises a mechanical switch and a power unit of the flow through branch, the transfer branch comprises improved H-bridge structures and a power unit of the transfer branch, the improved H-bridge structures comprise three parallel branches, the first branch comprises a capacitor, each of the second and third branches comprises two full-control type power devices in reverse serial connection, and the structure of the hybrid high-voltage DC breaker is the improved H-bridge structure. In the process that a fault current is disconnected, the power unit of the hybrid high-voltage DC breaker avoid impact of fault current on anti-paralleled diodes of the full-control type power devices, loss of the power unit is reduced, and the service life of the hybrid high-voltage DC breaker can be improved effectively.

Description

technical field [0001] The invention relates to a hybrid high-voltage direct current circuit breaker and a power unit thereof, belonging to the technical field of direct current circuit breakers. Background technique [0002] At present, with the continuous research on HVDC circuit breakers by domestic and foreign research institutions, hybrid HVDC circuit breakers have been widely used in HVDC flexible transmission systems and multi-terminal flexible DC transmission system engineering. Among the research results of the hybrid HVDC circuit breaker power unit, foreign countries are represented by ABB's direct series connection of IGBTs, and domestically, they are represented by the H-bridge structure topology proposed by the Global Energy Internet Research Institute. [0003] For example, the invention patent with publication number CN 104702256 A "An IGBT Driving Method for a High-Voltage DC Circuit Breaker" discloses a driving method for an IGBT of a high-voltage DC circuit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K17/567H03K17/081H02H9/02
CPCH03K17/567H02H9/02H03K17/08116
Inventor 蔚泉清程铁汉马俊海王鹏高树同吴军辉钟建英卢敬伟贾娜渠学景王勇刘智全刘浩
Owner PINGGAO GRP
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