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Accelerated tripping method for main transformer backup protection based on sharing information across intervals

A backup protection and information sharing technology, applied to emergency protection circuit devices, electrical components, etc., can solve problems such as wasting time and not knowing the opening and closing conditions, and achieve the effects of shortening tripping time, improving quickness, and improving performance

Active Publication Date: 2016-08-17
STATE GRID CORP OF CHINA +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to this trip logic, if the bus coupler is in position or the bus coupler is charging, there is no need to send a trip command to the bus coupler intelligent terminal to drive the bus coupler section circuit breaker to trip, but because the main transformer protection does not know its opening and closing status, so it will waste some time

Method used

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  • Accelerated tripping method for main transformer backup protection based on sharing information across intervals
  • Accelerated tripping method for main transformer backup protection based on sharing information across intervals
  • Accelerated tripping method for main transformer backup protection based on sharing information across intervals

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Embodiment Construction

[0019] The present invention is an accelerated tripping method for main transformer backup protection based on cross-interval sharing information, specifically an accelerated tripping method for main transformer backup protection applied in intelligent substations, which utilizes the bus tie section circuit breakers on each side of the main transformer The location information determines whether to perform the acceleration trip operation, and an acceleration trip logic is added to the backup protection function of the medium / low voltage side of the main transformer, which is mainly used in the backup protection of the main transformer protection to realize the acceleration trip of the backup protection.

[0020] The backup protection on the medium and low voltage side of the main transformer utilizes shared information across intervals to realize accelerated discrimination. This is when the tripping logic is satisfied. In this case, the main transformer protection does not need...

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Abstract

The invention belongs to the technical field of electric power systems, and in particular relates to an accelerated tripping method for main transformer backup protection based on information shared across intervals and applied to intelligent substations. The invention adds an acceleration trip logic to the backup protection function of the medium / low voltage side of the main transformer, and the backup protection of the middle and low voltage side of the main transformer uses the shared information across the interval to realize the acceleration judgment. The invention sends the position information of the bus tie section circuit breaker into the main transformer protection, and realizes the accelerated tripping of the circuit breakers on all sides of the main transformer under the condition of the bus tie sub-position or the bus tie charging, thereby shortening the tripping time and improving the protection. Significant advantages such as quickness and improved protection performance.

Description

technical field [0001] The invention belongs to the technical field of power systems, and in particular relates to an accelerated tripping method for backup protection of main transformers applied to intelligent substations based on shared information across intervals. Background technique [0002] The main transformer protection consists of the main protection and various backup protections. The backup protection includes the protection of the high voltage side and the medium and low voltage side. Usually, the switching value collected by the main transformer protection includes the position of the circuit breaker on the high, medium and low sides of the main transformer, and does not collect the position information of the bus-tie section circuit breaker for each test. When the protection tripping logic of each side is satisfied, the tripping sequence is to trip the bus-tie section circuit breakers on each side of the main transformer first, and then trip the circuit break...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/04
Inventor 梁经宛于同伟葛维春黄旭王城钢李峰席亚克张仑山王雷涛
Owner STATE GRID CORP OF CHINA
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