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Differentiated power distribution network fault processing complementary method based on special operation mode

A distribution network fault and special operation technology, which is applied in the direction of emergency treatment of AC circuit layout, electrical components, circuit devices, etc., to achieve the effect of ensuring accuracy and avoiding secondary tripping

Inactive Publication Date: 2016-08-31
STATE GRID TIANJIN ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the variety of distribution network power supply modes, the existing distribution network fault handling cannot meet the actual needs for some special operation modes. Therefore, it is necessary to provide differentiated distribution network fault handling technologies for special operation modes to Meeting the needs of changing distribution network power supply modes

Method used

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  • Differentiated power distribution network fault processing complementary method based on special operation mode
  • Differentiated power distribution network fault processing complementary method based on special operation mode
  • Differentiated power distribution network fault processing complementary method based on special operation mode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] as attached figure 1 As shown, #1 line and #2 line form a hand-in-hand loop through #1 ring network cabinet and #4 ring network cabinet, the contact switch is #4 ring network cabinet 42 contact switch, #1 ring network cabinet, #2 ring network cabinet The cabinet and #3 ring network cabinet form a small circuit by themselves, and the contact switch is the 14 small circuit contact switch of #1 ring network cabinet.

[0020] As shown in the figure, when the cable between #1 ring network cabinet and #2 ring network cabinet fails, the isolation solution given by the normal fault handling function is to disconnect the #1 ring network cabinet 12 switch, and the recovery solution is to close the 1# line switch , There is no recovery plan for #2 ring network cabinet and #3 ring network cabinet.

[0021] In fact, to restore the power supply in the non-faulty area, close the 1# line switch, and then close the 14 small circuit contact switch of the #1 ring network cabinet.

[002...

Embodiment 2

[0025] as attached figure 2 , #1 line and #2 line form a hand-in-hand loop through #1 ring network cabinet, #2 ring network cabinet and #4 ring network cabinet, the contact switch is #4 ring network cabinet 42 contact switch, #1 ring network cabinet and #4 ring network cabinet There are double cables between the #2 ring network cabinets, and the double cables are stuck on the CT, and the other lines are single cables.

[0026] as attached figure 2 , when one of the dual cables between #1 ring network cabinet and #2 ring network cabinet fails, the fault current backflow will cause #2 ring network cabinet 21 switch to also send an overcurrent signal, and the system judges it as #2 ring network If the busbar of the cabinet is faulty, the isolation scheme given is to disconnect the switch 21 of the #2 ring main unit and the switch 22 of the #2 ring main unit, and the recovery plan is to close the 1# line switch and the 42 contact switch of the #2 ring main unit. Due to the wro...

Embodiment 3

[0032] as attached image 3 , #1 line, #2 line and #3 line are three connections, #1 ring network cabinet is powered by #1 line, #2 ring network cabinet and #3 ring network cabinet are powered by #3 line, #4 ring network cabinet Powered by line #2, the contact point of #1 line and #3 line is #1 ring main unit 12 contact switch, the contact point of #2 line and #3 line is #4 ring main unit 42 contact switch, important users are double For power users, the power supply at both ends is line #1 and line #3, and the switches at both ends are switch 13 of #1 ring main unit and switch 23 of #2 ring main unit.

[0033] as attached image 3 , when the cable between #2 ring network cabinet and #3 ring network cabinet fails, the isolation scheme given by the system is to disconnect switch 24 of #2 ring network cabinet and switch 31 of #3 ring network cabinet, and the upstream restoration scheme is to close 3# line switch, there are two situations in the downstream restoration scheme, o...

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Abstract

The invention relates to a differentiated power distribution network fault processing complementary method based on a special operation mode. Two operation modes and one power guarantee mode are analyzed so that differentiated fault processing solve strategies are obtained, wherein the two operation modes refer to a single power supply ring network mode and a double cable power supply mode, and the power guarantee mode is mainly for guaranteeing the double power supply performance of users after fault recovery for the double power supply users. Adaptability of the power distribution network fault processing function of the present stage is considered, the influence of flow of the special operation mode on a common fault processing logic algorithm and the defects of the common fault processing logic are also considered, and a power distribution network fault processing complementary technology based on the special operation mode is obtained through comprehensive consideration so that wide adaptability and practicality of power distribution network fault processing can be guaranteed, the reliability of power distribution network fault processing can be enhanced, power supply time can be shortened and user satisfaction can be enhanced.

Description

technical field [0001] The invention relates to a distribution network fault processing technology, relates to a fault processing technology in a distribution automation system, in particular to a differential distribution network fault processing supplementary method based on a special operation mode. Background technique [0002] The distribution network fault isolation and power supply recovery methods in the prior art are all analyzed for the general distribution network grid structure. However, due to the variety of distribution network power supply modes, the existing distribution network fault handling cannot meet the actual needs for some special operation modes. Therefore, it is necessary to provide differentiated distribution network fault handling technologies for special operation modes to Meet the needs of the ever-changing distribution network power supply mode. Contents of the invention [0003] In order to solve the deficiencies of the prior art, the purpo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
CPCH02J3/00H02J3/001
Inventor 李聪利刘钧元赵宇营张渭鹏毕永健王磊尹鹏吴凯
Owner STATE GRID TIANJIN ELECTRIC POWER
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