Fixed-value adaptive voltage and current time type on-site feeder automation method

A feeder automation and self-adaptive voltage technology, which is applied to electrical components, emergency protection circuit devices, etc., can solve problems such as long fault processing time, failure of fault processing logic, and misoperation, so as to save construction costs, reduce power outages, and reduce power outages. less frequent effect

Active Publication Date: 2016-10-12
NARI TECH CO LTD +3
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AI Technical Summary

Problems solved by technology

[0002] Although the existing mainstream feeder automation system with reclosers and voltage-time sectionalizers has a fault handling function, it takes a long time to handle faults. "Voltage lockout" is not absolutely reliable. Once it fails, it will cause the normal line on the opposite side to lose voltage and then go through a round of reclosure be

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  • Fixed-value adaptive voltage and current time type on-site feeder automation method
  • Fixed-value adaptive voltage and current time type on-site feeder automation method
  • Fixed-value adaptive voltage and current time type on-site feeder automation method

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0030] A fixed-value self-adaptive voltage-current-time-type on-site feeder automation method. The substation exit circuit breaker CB is equipped with delayed quick-break protection and one-time reclosing function. The circuit breaker is used for the switch along the line, and the configuration is as follows:

[0031] Define Tt as the trip delay time of the CB protection of the exit circuit breaker, T as the trip delay time of the section switch overcurrent protection, X is the delayed closing time of the section switch, and Y is the detected fault current after the section switch is closed The maximum time limit, W is the time interval for the subsection switch to detect short-term incoming cal...

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Abstract

The invention discloses a fixed-value adaptive voltage and current time type on-site feeder automation method, which is characterized in that a transformer substation outlet circuit breaker is configured with delayed quick disconnection protection and one-shot reclosing functions, and a switch along a feeder adopts a circuit breaker. According to the method disclosed by the invention, fault positioning and isolation of a multi-branch multi-linked power distribution network through a mode of outlet one-short reclosing, overcurrent delay tripping, closing overcurrent quick breaking and short-time power recovery tripping and by being combined with an interphase short circuit/single-phase grounding transient characteristic fault detection technology and matched with one-shot reclosing of the transformer substation outlet circuit breaker.

Description

technical field [0001] The invention relates to a fixed-value self-adaptive voltage-current-time type on-site feeder automation method, which belongs to the field of electric power system and automation thereof. Background technique [0002] Although the existing mainstream feeder automation system with reclosers and voltage-time sectionalizers has a fault handling function, it takes a long time to handle faults. "Voltage lockout" is not absolutely reliable. Once it fails, it will cause the normal line on the opposite side to lose voltage and then go through a round of reclosure before the power supply can be restored; and this mode often needs to be reconfigured after the operation mode of the distribution network changes. value, otherwise the fault handling logic will fail, or even malfunction; this mode is generally only applicable to radial, "hand-in-hand" distribution networks and simple multi-section distribution networks. Contents of the invention [0003] In order...

Claims

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Application Information

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IPC IPC(8): H02H7/26
CPCH02H7/26
Inventor 封士永蔡月明丁孝华刘明祥刘爱华杜红卫韩韬孙建东曾俊朱冉范元亮
Owner NARI TECH CO LTD
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