Fault isolation method of electric distribution network

A technology for distribution network faults and faults, which is applied in the field of power transmission and transformation, can solve problems such as cumbersome and complex judgment conditions, and achieve the effect of improving reliability and safety and preventing damage

Inactive Publication Date: 2011-04-06
NANJING INTELLIGENT DISTRIBUTION AUTOMATION EQUIP
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Problems solved by technology

The second and third conditions require cumbersome and complicated judgment conditions, which put forward high requirements for the control unit of the recloser

Method used

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  • Fault isolation method of electric distribution network
  • Fault isolation method of electric distribution network
  • Fault isolation method of electric distribution network

Examples

Experimental program
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Embodiment Construction

[0021] Among the ring network type distribution network applied in this example, the selection of specific devices is: remote communication module: ADAM-6501 Web general communication controller of Anai Electronics; microcomputer integrated protection control unit: DPX of Anhui Xinlong Electric Co., Ltd. A series of microcomputer integrated protection measurement and control devices. The reclosers are set at each control node of the ring network type distribution network; each recloser is connected to a microcomputer integrated protection control unit, and the microcomputer integrated protection control unit outputs control signals to the recloser; the microcomputer integrated protection control unit communicates with the remote module connection. The remote communication module is an Ethernet control module. The remote control host takes an industrial control computer as the core, and the industrial control computer is connected with a remote communication module. For each ...

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Abstract

The invention discloses a fault isolation method of an electric distribution network, comprising the steps: firstly, a remote control host computer judges if a switch-onto-fault latching exists or not according to the upload information after the remote control host computer receives a latching information: the current passing through a common recloser before the latching is detected to judge whether the current exceeds the setting value or not, if the current does not exceed the setting value, the latching is not a switch-onto-fault latching, and if the current exceeds the setting value, the latching is a switch-onto-fault latching; the host computer does not act when the latching does not belong to the switch-onto-fault latching; and the host computer firstly judges and processes before acting when the latching belongs to the switch-onto-fault latching. The method enhances the reliability and the safety of the latching of the recloser, reduces the high requirement to the performance of the control unit due to the excessively complicated judging conditions, and prevents the damage to the electric power system caused by the unnecessary switch-onto-fault in the network.

Description

technical field [0001] The invention belongs to the technical field of power transmission and transformation, and is suitable for a recloser-based distribution network automation equipment to isolate permanent faults in a 10kV ring network type distribution network and ensure safe recovery of power supply in non-faulty sections. Background technique [0002] With the development of the power system and the introduction of the concept of smart grid, users have put forward higher requirements for the reliability of the grid. At present, domestic rural power grids and small and medium-sized city 10kV distribution networks mostly use AC high-voltage automatic reclosers with self-control and protection functions in conjunction with other high-voltage electrical equipment to realize the automation of distribution networks. When a fault occurs in the distribution network, the recloser before the fault section detects the fault current and disconnects and recloses after a delay, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J13/00
Inventor 徐建源于扬王博
Owner NANJING INTELLIGENT DISTRIBUTION AUTOMATION EQUIP
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