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10kV distribution line breaking detection method based on multi-system information interaction

A technology of distribution lines and information exchange, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc.

Active Publication Date: 2015-01-21
STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST +1
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Problems solved by technology

[0006] The purpose of the present invention is to solve the detection problem of disconnection of 10kV distribution line, this utility model proposes a 10kV distribution line based on multi-system information interaction Disconnection detection method

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  • 10kV distribution line breaking detection method based on multi-system information interaction
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  • 10kV distribution line breaking detection method based on multi-system information interaction

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Embodiment Construction

[0025] The present invention is concretely implemented in Jiangxi Province power grid:

[0026] The implementation of the present invention includes data acquisition, collecting bus single-phase grounding fault signals in substation signals; 10kV distribution line disconnection detection application module monitors and analyzes distribution transformer operation, judges possible disconnection faults of lines and sends out the distribution Alarm signal for wire disconnection.

[0027] The data collection in this embodiment utilizes a power consumption information collection system and an EMS (Energy Management System).

[0028] At present, all twelve prefectural and city companies of Jiangxi Power Grid Company have established EMS systems. The EMS system has realized the integration of district and county dispatching, and can realize the monitoring and control of all comprehensive automatic substations of the prefecture, city and county companies. Through the EMS system , the ...

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Abstract

A 10kV distribution line breaking detection method based on multi-system information interaction is achieved on the basis of an existing power grid operation monitoring system through information interaction between multiple operation monitoring systems. According to the method, on the basis of a stereoscopic network topological relation involving a substation, an outgoing line, branch lines, distribution transformers and a typical low-voltage side, 10kV distribution line breaking warning information is provided for an operator by means of distribution transformer monitoring data, and the realistic problem that breaking faults of a 10kV distribution line are difficult to find is solved. Meanwhile, the method can be used in a provincial power grid operation monitoring center in a concentrated mode, unified operation and maintenance are achieved, 10kV distribution line breaking detection warning of a whole province is achieved, the mode that each station needs to be provided with a traditional power system automatic device is eliminated, investment for equipment purchasing, installation, debugging and daily maintenance and overhaul is greatly reduced, reliability of distribution network operation is improved, the safety hidden hazard that human casualty accidents are caused due to line breaking is reduced, cost of power enterprises is greatly reduced, and economic benefits and social benefits are good.

Description

[0001] technical field [0002] The invention relates to a 10kV distribution line disconnection detection method based on multi-system information interaction, which belongs to the technical field of electric power information automation. Background technique [0003] In my country's power grid system, the 10kV line is not directly grounded. Once a single-phase ground fault or even a disconnection fault occurs on the 10kV line, the 10kV feeder protection will not trip directly. The two-phase voltage rises to 1.732 times the rated phase voltage, but the line voltage of this feeder is still normal. [0004] At present, the single-phase ground fault is usually judged by the small current grounding line selection device installed in the substation. There are quite a few substations in the provincial power grid that have not installed small-current grounding line selection devices, and substations that have installed small-current grounding line selection devices, part of whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/02
Inventor 郑蜀江安义蔡木良王华云潘建兵李博江刘蓓
Owner STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST
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