Detecting and positioning method of bus coupler flashover fault in subway alternating current power system

A technology of power supply system and bus tie flashover, which is applied in the direction of fault location, information technology support system, and test dielectric strength, etc., can solve problems such as no mature solutions, achieve good social and economic benefits, reliable positioning, and shorten power supply The effect of recovery time

Active Publication Date: 2013-11-27
NR ELECTRIC CO LTD +1
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  • Claims
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Problems solved by technology

[0008] For this type of failure, there is no mature solution in the public information

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  • Detecting and positioning method of bus coupler flashover fault in subway alternating current power system
  • Detecting and positioning method of bus coupler flashover fault in subway alternating current power system
  • Detecting and positioning method of bus coupler flashover fault in subway alternating current power system

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Embodiment Construction

[0031] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0032] The present invention provides a method for detecting and locating the bus tie flashover fault in the subway AC power supply system. The subway power supply system is usually divided into different multiple power supply partitions, and the main substation in each power supply partition is connected to a plurality of station substations. The power supply is supplied by the substation, and the substations are connected by 35kV ring network cables. figure 1 It shows a typical subway power supply partition composed of the main substation and 4 station substations. In order to facilitate the description of the technical solution of the present invention, we assume that the bus-tie circuit breaker of the #2 station substation has a flashover fault. The "Detection and location method for bus tie flashover fault in the subway AC power suppl...

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Abstract

The invention discloses a detecting and positioning method of a bus coupler flashover fault in a subway alternating current power system. The method comprises the following steps: (1) all protection devices configured in a single power supply zone in the subway alternating current power system is connected to a unified GOOSE network, and the protection devices connected with the GOOSE network are provided with a GOOSE network communication capability; and (2) a bus coupler protection device performing fault detection and location inside each transformer substation realizes a decision logic, and when all the decision logics are met, the bus coupler protection device determines that the a bus coupling protected by the bus coupling protection device has a flashover fault and the bus coupler protection device alarms. The method of the invention can rapidly detect and locate the flashover fault point after the bus coupler flashover fault happens, so that the operating maintenance personnel can quickly restore the normal operation of the metro power supply system and the power supply recovery time is shortened.

Description

technical field [0001] The invention relates to a method for detecting and locating flashover faults of bus couplings in a power supply system, which is suitable for AC ring network power supply systems of subways, urban light rails and trams, and other fields with similar network structures. Background technique [0002] The network structure of the subway medium voltage power supply system is mainly based on the double ring network single power supply mode. Each subway line is equipped with 2-3 110kV main substations and 35kV station substations (such as traction substations, step-down substations, traction-step-down hybrid substations, follow-up substations, etc.) are arranged in the subway stations. In order to ensure the reliability of the subway power supply, both the subway main substation and the station substation adopt a single bus section main wiring structure, and a bus tie circuit breaker is installed between the two bus sections. Each 110kV main substation int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08G01R31/12
CPCY04S10/522Y04S10/52
Inventor 严伟魏巍刘永生牛洪海陈俊沈全荣
Owner NR ELECTRIC CO LTD
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