A fault self-processing control method and system for a high-voltage direct current circuit breaker

A processing control, high-voltage direct current technology, applied in the direction of automatic disconnection of emergency protection devices, circuit devices, emergency protection circuit devices, etc., can solve problems such as system outage, affecting power supply stability, etc., to avoid system outage, short-term Fault waiting time, the effect of enhancing system stability

Active Publication Date: 2020-01-24
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the DC side fault occurs, if the system is cut off immediately, it may cause unnecessary system outage due to instantaneous fault and affect the stability of power supply

Method used

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  • A fault self-processing control method and system for a high-voltage direct current circuit breaker
  • A fault self-processing control method and system for a high-voltage direct current circuit breaker
  • A fault self-processing control method and system for a high-voltage direct current circuit breaker

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Embodiment Construction

[0046] In order to better understand the present invention, the content of the present invention will be further described below with reference to the accompanying drawings and examples.

[0047] Taking a simplified system of a typical hybrid DC circuit breaker as an example, the DC circuit breaker topology is shown in the appendix. figure 1 shown, the system model is attached figure 2 shown,

[0048] This embodiment provides a fault self-processing control method for a high-voltage DC circuit breaker, such as image 3 , the control method includes:

[0049] Considering the overcurrent level of the system, the topology of the DC circuit breaker and the parameters of the original components, set the appropriate reference current. If the current value is limited to a small value, the electrical and thermal stress of the components such as the arrester can be reduced, but the fault recovery time of the system will be longer. Because after the current becomes smaller, it takes...

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Abstract

The invention relates to a fault self-processing control method of a high-voltage DC circuit breaker, which comprises the following steps: receiving a detection signal; when a fault occurs, disconnecting a main branch system; conducting a transfer branch for current limiting control; and meanwhile recording the time of current limiting; determining the maximum value of detection energy and whether the detected fault is cleared or not; if in a preset first period, the maximum value of detection energy does not exceed the preset energy value, clearing the fault and conducting the main branch system so that it restores to the normal operation; and if the current limiting time exceeds the preset first time or the maximum value of the energy exceeds the preset energy value, disconnecting the transfer branch. The present invention provide a fault self-processing control method for handling DC side faults of different types and in different severity so as to enhance the stability and reliability of system operation.

Description

technical field [0001] The invention relates to a fault self-processing control method, in particular to a fault self-processing control method and system of a high-voltage direct current circuit breaker. Background technique [0002] The DC circuit breaker is a key device for clearing the DC side fault. The hybrid DC circuit breaker has the advantages of small on-state loss, fast response time, good controllability, and no need for special cooling equipment. It can flexibly control the fault short-circuit current without blocking all converter stations, and has good application prospects and research value. . [0003] As one of the key components of the DC circuit breaker, the arrester, when the system is running normally, the solid-state switch makes the current flowing through the arrester bypass extremely small; when the system fails, the solid-state switch is turned off, and the arrester is put into use to make use of its good nonlinearity. The volt-ampere characteris...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H3/087
CPCH02H3/087
Inventor 刘栋林畅吴学光翟雪冰庞辉
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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