Pilot channel transmission device, optical fiber differential protective device and method

A technology of differential protection device and transmission device, applied in the field of optical fiber differential protection device, substation automation system, and longitudinal channel transmission device, which can solve the problem of different data transmission format and content, poor compatibility of protection device hardware, etc. problems, to achieve the effect of easy expansion, simple implementation, and improved compatibility

Inactive Publication Date: 2010-09-22
XJ ELECTRIC +1
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  • Abstract
  • Description
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Problems solved by technology

[0007] Another object of the present invention is to provide a longitudinal channel optical fiber differential protection device to solve the problem that the optical fiber di

Method used

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  • Pilot channel transmission device, optical fiber differential protective device and method
  • Pilot channel transmission device, optical fiber differential protective device and method
  • Pilot channel transmission device, optical fiber differential protective device and method

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Embodiment Construction

[0039] The present invention is described by taking the SMV network and GOOSE network respectively networking mode of each interval in the digital substation as an example.

[0040] The longitudinal channel transmission device of the present invention is as figure 1shown, including:

[0041] The CPU plug-in is equipped with a process layer data processing unit and a longitudinal data processing unit. The process layer data processing unit is used for sending and receiving of process layer data in the substation and synchronous and interval layer data through the Ethernet interface. The longitudinal data processing unit is used for data sending and receiving processing with the longitudinal channel;

[0042] Optical-to-optical converters, used to convert serial electrical signal data into optical signals and send them to the external fiber channel or convert optical signals of fiber channel into serial electrical signals and input them to the CPU plug-in;

[0043] Protocol co...

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Abstract

The invention relates to a pilot channel transmission device, a pilot channel optical fiber differential protective device and a pilot channel optical fiber differential protective method, and belongs to the technical field of relay protection of electric power systems. The pilot channel optical fiber differential protective device comprises a merging unit, a pilot channel transmission device, differential protective devices, a fault wave recording device, an SMV network switch and a GOOSE network switch, wherein the GOOSE network switch is respectively connected with the pilot channel transmission device, the differential protective devices and the fault wave recording device; the merging unit, the differential protective devices, the pilot channel transmission device and the fault wave recording device are connected to the SMV network switch through an optical fiber interface; the pilot channel transmission device realizes the synchronous sampling of a home station and a transformer substation on the opposite side, and outputs sampling values of the transformer substation on the opposite side to the SMV network switch; and data with different formats is transformed by using a converter according to requirements, so that manufacturers of the differential protective devices at both ends of a transmission line do not need to be limited, and the compatibility of the protective devices is improved.

Description

technical field [0001] The invention relates to a longitudinal channel transmission device, an optical fiber differential protection device and a method, and belongs to the technical field of electric power system relay protection, especially a substation automation system based on the IEC61850 standard communication protocol in a digital substation using electronic current and voltage transformers in the application. Background technique [0002] Due to its simple protection principle and excellent performance characteristics, optical fiber current differential protection is increasingly used as the main protection of high-voltage and ultra-high-voltage transmission lines. The current differential protection requires that the current at each terminal involved in the calculation of the differential current must be sampled at the same time. The double-ended current involved in the calculation of transmission line differential protection is the secondary sampling value of the...

Claims

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Application Information

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IPC IPC(8): H04L12/28H04L12/56H04L29/08H04L7/00H02H7/26
Inventor 张克元倪传坤廉海涛李文正李宝伟
Owner XJ ELECTRIC
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