High-voltage direct-current breaker based on Buck-Boost converter topology and fault removal method thereof

A high-voltage DC and circuit breaker technology, which is applied in the direction of converting DC power input to DC power output, instruments, and adjusting electrical variables, etc., which can solve the problems of high equipment operating loss, high equipment cost of circuit breakers, and slow response speed.

Inactive Publication Date: 2015-07-08
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of high cost, slow response speed and high equipment operation loss of existing circuit breakers, and provides a new type of unidirectional transformer-type

Method used

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  • High-voltage direct-current breaker based on Buck-Boost converter topology and fault removal method thereof
  • High-voltage direct-current breaker based on Buck-Boost converter topology and fault removal method thereof
  • High-voltage direct-current breaker based on Buck-Boost converter topology and fault removal method thereof

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Embodiment

[0063] Such as figure 1 As shown, a new type of unidirectional transformer-type HVDC circuit breaker based on the Buck-Boost converter topology, including the circuit breaker and control system, wherein the circuit breaker includes the IGBT switch module group S connected to the positive input terminal 1 , IGBT switch module group S 1 The output terminal of the inductor L is connected to the inductor L, the output terminal of the inductor L is used as the positive output terminal, and the input capacitor C is connected between the positive input terminal and the negative input terminal. i , an output capacitor C is connected between the positive output terminal and the negative output terminal o , IGBT switch module S 1 The output terminal of the diode module group D simultaneously with the 1 Negative connection of the diode module group D 1 The positive pole of the terminal is connected to the positive output terminal. The specific connection is as follows: figure 2 as...

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Abstract

The invention discloses a high-voltage direct-current breaker based on Buck-Boost converter topology and a fault removal method thereof. The purpose is to solve the problems that existing breaker equipment is high in cost, low in response speed and high in operation loss. The high-voltage direct-current breaker comprises a breaker body and a control system. The control system comprises inner loop adjusting and controlling current and outer loop adjusting and controlling voltage, an auxiliary controller is additionally arranged for double-closed-loop adjusting and used for performing voltage transforming and protection controlling on the high-voltage direct-current breaker, and therefore the high-voltage direct-current breaker has the advantages of achieving more functions, being higher in on-off speed and lowering the cost better compared with a traditional high-voltage breaker. The high-voltage direct-current breaker can achieve the functions of increasing and decreasing the voltage when a high-voltage direct-current power transmission system normally operates, can achieve switching between the voltage-increasing state and the voltage-decreasing state and can be flexibly applied to power lines of different voltage grades. Meanwhile, when happening on the power transmission lines, short-circuiting faults can be effectively removed in time.

Description

technical field [0001] The invention relates to a high-voltage direct current transmission transformation and protection control system, in particular to a novel unidirectional transformation type high-voltage direct current circuit breaker based on Buck-Boost converter topology. Background technique [0002] In the high-voltage AC transmission system, the normal input and accidental disconnection of the transmission line are realized through the high-voltage AC circuit breaker. In the high-voltage direct current transmission system, the control of the converter valve control (gate) is used to eliminate temporary faults or when a short-circuit fault occurs, a mechanical high-voltage circuit breaker is used to cut it off. However, with the development of VSC-HVDC power transmission technology Due to the long response time of mechanical high-voltage DC circuit breakers, it is difficult to meet the needs of rapid removal of short-circuit faults. Therefore, it is very necessary...

Claims

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Application Information

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IPC IPC(8): H02H3/08H02M3/155
Inventor 唐良义陈维荣唐立刘志祥李奇戴朝华张雪霞
Owner SOUTHWEST JIAOTONG UNIV
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