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Unidirectional transformation type high-voltage DC circuit break device and fault removing method

A high-voltage direct current and circuit-breaking device technology is applied in emergency protection circuit devices, output power conversion devices, and direct-current power input conversion to direct-current power output. device, etc.

Inactive Publication Date: 2017-03-08
CHENGDU POWER SUPPLY COMPANY OF STATE GRID SICHUAN ELECTRIC POWER +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a unidirectional transformer-type high-voltage DC circuit breaker and a fault removal method, which solves the technical problem that the existing circuit breaker cannot realize the functions of a DC step-up transformer and a high-voltage DC circuit breaker at the same time, and realizes the high-voltage DC circuit breaker. The technical effect that the circuit breaker can realize the functions of DC step-up transformer and high-voltage DC circuit breaker at the same time

Method used

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  • Unidirectional transformation type high-voltage DC circuit break device and fault removing method
  • Unidirectional transformation type high-voltage DC circuit break device and fault removing method
  • Unidirectional transformation type high-voltage DC circuit break device and fault removing method

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Embodiment 1

[0054] In Example 1, please refer to figure 1 , provides a unidirectional transformer-type high-voltage DC circuit breaker based on a Boost converter, including a circuit breaker and a control system, wherein the circuit breaker includes an inductor L connected to the positive input terminal, and the output terminal of the inductor L is connected to the IGBT switch module group S 1 Anode connected, IGBT switch module group S 1 anode simultaneously with the diode module group D 1 Anode connection of the diode module group D 1 The cathode is connected to the positive output terminal, the IGBT switch module group S 1 The cathode, the negative input terminal, and the negative output terminal are grounded at the same time, and an 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 , the specific topology is as figure 2 ...

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Abstract

The invention discloses a unidirectional transformation type high-voltage DC circuit break device and a fault removing method. The device comprise a circuit breaker and a control system, the control system comprises an inner-loop adjusting control current and an outer-loop adjusting control voltage, and an auxiliary controller is added to double-closed-loop adjustment to realize transformation and protection control of the high-voltage DC circuit breaker. Compared with a traditional high-voltage circuit breaker, the device has the advantages of more functions, high ON / OFF speed and reduced cost, a boosting transformer function of the circuit breaker is realized when a high-voltage DC power transmission system runs normally, and the device can be applied to power lines of different voltage levels flexibly; and a short-circuit fault can be removed effectively and rapidly when the short circuit fault occurs in the power transmission line, and high-voltage DC power transmission equipment and load equipment are protected.

Description

technical field [0001] The invention relates to the research field of transmission line protection devices, in particular to a boost converter-based unidirectional transformer-type high-voltage direct current circuit breaker and a method for removing short-circuit faults of the transformer-type high-voltage direct current circuit breaker. 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 remov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/26H02M3/158
CPCH02H7/26H02M3/1582
Inventor 唐良义杨坤王坤林俊洁向路先李红柳崔开源余杰张璞
Owner CHENGDU POWER SUPPLY COMPANY OF STATE GRID SICHUAN ELECTRIC POWER
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