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A high-voltage plant power fast switching system, power supply system and method

A technology for high-voltage factory and factory power consumption, which is applied in the integration of power network operating systems, information technology support systems, electrical components, etc.

Active Publication Date: 2021-07-30
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a high-voltage substation power fast switching system, power supply system and method, which solves the problem of the high-voltage substation power fast switching device being unable to identify the circuit breaker test position and "CT disconnection" Problems such as start-up switching logic, to prevent the high-voltage plant power quick-cutting device from still starting to switch when the circuit breaker is in the test position

Method used

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  • A high-voltage plant power fast switching system, power supply system and method
  • A high-voltage plant power fast switching system, power supply system and method
  • A high-voltage plant power fast switching system, power supply system and method

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Embodiment 1

[0029] This embodiment provides a high-voltage utility power quick-cutting system, including a quick-cutting device, and the opening board of the quick-cutting device is additionally provided with a working power supply working position interface and a backup power working position interface for accessing position signals, namely ,Such as figure 1 As shown, add "working power supply working position" and "standby power supply working position" on the opening board of the conventional quick-cutting device.

[0030] The power signal connected to the quick switching device includes the incoming current of the working power supply and the incoming current of the standby power supply. . That is, if figure 2 As shown, the AC current loop of the conventional quick-cutting device is changed to: three-phase current input of the working power circuit breaker and three-phase current input of the standby power circuit breaker, so as to increase the "CT disconnection" start switching lo...

Embodiment 2

[0033] This embodiment also provides a power supply system, including a working power supply, a backup power supply, a transfer switch, and the high-voltage utility power fast switching system described in Embodiment 1, the fast switching device is connected to the working power supply, and the fast switching device passes through The transfer switch is connected to multiple backup power sources.

Embodiment 3

[0035] This embodiment also provides a control method for a high-voltage plant power fast switching system, setting a status mark, and when the state mark meets the first state, the switching mode of the fast switching device does not consider the position of the working / standby power circuit breaker; The snap-off device considers a service / backup power circuit breaker position when the status flag satisfies a second status.

[0036] In this embodiment, the state is marked as the test control word, the first state is that the test control word is set to 1, and the second state is that the test control word is set to 0. When the test control word is set to 1, the high-voltage plant power fast switching device is the same as the conventional fast switching device, regardless of the "work / standby power circuit breaker position", its switching mode and logic are also the same as the conventional device, and will not be repeated here. .

[0037] When the test control word is set t...

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Abstract

The invention discloses a high-voltage plant power fast switching system, a power supply system and a method, which solves the problems that the high-voltage plant power fast switching device cannot recognize the circuit breaker test position and "CT disconnection" start switching logic, and prevents high-voltage plant power The electric fast switching device still starts to switch when the circuit breaker is in the test position; its technical scheme is: including the fast switching device, the opening board of the fast switching device is added with a working power supply working position interface for accessing position signals, and a backup power working position interface. Bit interface, so that the quick-cutting device can identify the test position of the circuit breaker; the electrical signal connected to the quick-cutting device includes the incoming current of the working power supply and the incoming current of the backup power supply, and the incoming current of the working power supply is connected to the three-phase circuit breaker of the working power supply The current of the backup power incoming line is connected to the three-phase current of the backup power circuit breaker.

Description

technical field [0001] The invention relates to the technical field of high-voltage substation power fast switching, in particular to a high-voltage substation power fast switching system, a power supply system and a method. Background technique [0002] The quick cut device is mainly used to ensure the power supply of the plant. Plant power is generally not allowed to be lost for a long time. In the case of a fault, the power supply load may be cut off due to bus failure or working power failure. At this time, it is necessary to switch to the backup power supply to continuously supply power to the load. [0003] The inventors found that the general high-voltage factory power quick-cut device cannot identify the working / experimental position of the working and standby incoming circuit breakers, such as: the factory power is on the working power side, and the standby power incoming circuit breaker is at the test position. If it is switched to the standby power supply side in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J9/04H02J9/06
CPCH02J9/04H02J9/06Y02B70/30Y04S20/20
Inventor 董霞刘树林俞晓冬
Owner QILU UNIV OF TECH
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