Digitized line protection measurement and control system suitable for metro industry

A line protection, measurement and control system technology, applied in circuit devices, electrical components, etc., can solve the problems of protection quickness, can not be well satisfied, etc., and achieve the effect of broad application prospects

Active Publication Date: 2014-02-05
南京国电南自轨道交通工程有限公司
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Problems solved by technology

However, the backup overcurrent protection of the conventional ring network inlet and outlet switches is generally set according to the principle of avoiding the maximum load current and has a time limit, which cannot well meet the requirements for quick action of the protection, especially when the busbar has a short-circuit fault And the cable fault that occurs when the differential is out of operation, the backup overcurrent protection needs a long delay to remove the fault

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  • Digitized line protection measurement and control system suitable for metro industry

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Embodiment Construction

[0012] In the following, the present invention will be described in terms of the system solution and the principle of the realization method in conjunction with the accompanying drawings.

[0013] 1. System solution: the digital line protection measurement and control system suitable for the subway industry in this embodiment, the platform is based on the PowerPC microprocessor, the VxWorks operating system, and adopts the integrated structure of protection and MMI display. The system adopts the back plug-in chassis mechanism and special shielding measures, and the group screen can not be equipped with anti-interference modules, and the whole has high reliability. The main components of the hardware are: AC sampling module, communication module, protection CPU module, input module, output module, output module, and power supply module. The modules are as follows: the AC sampling module provides multiple voltage input and current input circuits for protection and measurement re...

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Abstract

The invention discloses a digitized line protection measurement and control system suitable for the metro industry. A digital communication current protection function is provided for solving the quick-action performance problem of a former stand-by current protection system and for supporting GOOSE entering and exiting functions. IEC61850 achieves GOOSE communication of a protection system in a power substation and a protection system between power substations, the protection systems can monitor protective action conditions of upper level switches and lower level switches through a GOOSE network, and then 'rapid fault positioning' and 'rapid excision' of looped network buses and cables are achieved through logical judgment.

Description

technical field [0001] The invention relates to the field of power supply systems in the subway industry. The invention supports GOOSE input and output functions, and realizes the protection, measurement and control functions of the digital line protection measurement and control system through the IEC61850 protocol. Background technique [0002] In recent years, with the rapid growth of my country's national economy and the rapid development of the railway industry, the requirements for the selectivity, quickness, sensitivity and reliability of the rail transit ring network power supply system are getting higher and higher. However, the backup overcurrent protection of the conventional ring network inlet and outlet switches is generally set according to the principle of avoiding the maximum load current and has a time limit, which cannot well meet the requirements for quick action of the protection, especially when the busbar has a short-circuit fault And the cable fault t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J13/00
Inventor 随新鲜孙金华范三龙胡传伟
Owner 南京国电南自轨道交通工程有限公司
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