Network-sampling-based proportional braking coefficient variable digital transformer protection device

A technology of transformer protection and network sampling, which is applied in the direction of emergency protection circuit devices, synchronization devices, digital transmission systems, etc., and can solve problems such as inability to provide solutions

Active Publication Date: 2013-10-23
ELECTRIC POWER SCI RES INST OF GUIZHOU POWER GRID CO LTD +1
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0002] The synchronization problem has always been the biggest difficulty in differential protection of digital transformers with network sampling
This rigid proportional braking curve is no longer suitable for digital transformer protection devices based on network sampling, and the existing technology cannot provide a solution

Method used

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  • Network-sampling-based proportional braking coefficient variable digital transformer protection device
  • Network-sampling-based proportional braking coefficient variable digital transformer protection device

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Embodiment Construction

[0020] The present invention will be specifically introduced below in conjunction with the accompanying drawings and specific embodiments.

[0021] refer to figure 1 As shown, the digital transformer protection device 1 of the present invention based on network sampling variable ratio braking coefficient includes: a network sampling module, which is used to receive the sampled data from the merging unit and mark the sampled data with a time stamp, and receive the synchronous signal from The synchronization signal of the source device; the main CPU module of logic operation, the main CPU module of logic operation is connected to the network sampling module, and the main CPU module of logic operation is used for protection operation and adjustment of proportional braking coefficient; GOOSE sends trip module, GOOSE sends trip module to connect logic Operation main CPU module, GOOSE sending tripping module is used to send tripping message.

[0022] The present invention does not ...

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Abstract

The invention discloses a network-sampling-based proportional braking coefficient variable digital transformer protection device, which is characterized by comprising a network sampling module, a logic operation main CPU (computer processing unit) module and a GOOSE tripping transmission module, wherein the network sampling module is used for receiving sampling data from a combination unit, marking a timestamp on the sampling data, and receiving a synchronization signal from a synchronization signal source device; the logic operation main CPU module is connected with the network sampling module, and is used for protection operation and adjustment over a proportional braking coefficient; and the GOOSE tripping transmission module is connected with the logic operation main CPU module, and is used for transmitting a tripping message. The protection device can realize network sampling and change the proportional braking coefficient for the differential protection of a transformer according to time of arrival, so that the requirements of a power system user on protection over a digital transformer under an intelligent transformer substation and digital transformer substation network sampling condition can be met.

Description

technical field [0001] The invention relates to a digital transformer protection device, in particular to a digital transformer protection device based on network sampling variable ratio braking coefficient. Background technique [0002] The synchronization problem has always been the biggest difficulty in the differential protection of digital transformers with network sampling. At present, point-to-point sampling is generally used to solve the misoperation of digital transformer differential protection caused by synchronization problems, and the rated delay of the merging unit is used to correct the phase angle of the three-side current to realize the synchronization of digital transformer differential protection. [0003] With the development of network technology, the unified networking of the process layer will be the ultimate direction of the development of digital substation technology. How to solve the dependence on synchronous signal caused by network sampling has ...

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Application Information

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IPC IPC(8): H02H7/045G05B19/05H04L7/00
Inventor 高吉普陈建国徐长宝王宇
Owner ELECTRIC POWER SCI RES INST OF GUIZHOU POWER GRID CO LTD
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