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Portable intelligent distributed feeder automation test system

A feeder automation and testing system technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve problems such as the influence of communication systems that have not been considered, and achieve the effect of simplifying on-site assembly work, increasing observability, and improving accuracy

Inactive Publication Date: 2018-01-19
STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The publication number CN104122474A discloses an intelligent distributed feeder automation logic test system, which realizes the feeder automation logic test of the power distribution terminal by simulating the normal operation or fault state of the tested circuit, but has not considered the influence of the communication system

Method used

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  • Portable intelligent distributed feeder automation test system
  • Portable intelligent distributed feeder automation test system
  • Portable intelligent distributed feeder automation test system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1: The main line fails

[0036] figure 2 Shown is a typical open-loop distribution network, S1, S2 are substation outlet switches, A, B, D, E are line switches, and C is a tie switch. When the distribution line is in normal operation, S1, S2, A, B, D, E are closed, C is open, the current flow on the distribution line is: S1→A→B→C, S2→E→D; now suppose that when the distribution line fails, there is at most one section error occured.

[0037] Such as image 3 As shown, it can be divided into 6 kinds of faults.

[0038] Select a feeder automation control strategy that only needs to go through one reclosure, and its control strategy is as follows:

[0039] (1) if Figure 4a As shown, when a fault occurs between S1 and A, it is recorded as event F1; when a fault occurs between S1 and A, it will be detected that there is a fault current flowing through switch S1; no fault current flows through switches A, B, D, and S2 However, due to the protection mechanism, f...

Embodiment 2

[0051] Example 2: Branch line fails

[0052] Figure 5 As shown, it is a distribution network with a branch structure. The analysis method is consistent with the analysis method in 2.1 when the main line fails. The information fed back by the FA tester and the status information of each switch generated under the automatic control strategy of the feeder to be verified are respectively The summary table is as follows:

[0053] Table A Summary of status information of each switch fed back by FA tester

[0054] (1) Status information of each switch when a transient fault event occurs

[0055]

[0056] (2) Status information of each switch when a permanent fault event occurs

[0057]

[0058] Table B summarizes the status information of each switch under the feeder automation control strategy

[0059] (1) Status information of each switch when a transient fault event occurs

[0060]

[0061] (2) Status information of each switch when a permanent fault event occurs

...

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Abstract

A portable intelligent distributed feeder automation (FA) test system includes a master station, a communication channel, FA testers, A / D conversion modules, and feeder terminals. The master station is interconnected with the FA testers through the communication channel. The FA testers are respectively connected with the feeder terminals through the A / D conversion modules. The feeder terminals areinterconnected with the master station through the communication channel. The feeder terminals carry out information interaction with one another. The feeder terminals select and detect fault currents, has functions of fault identification and fault information storage, and transmit fault information to intelligent feeder terminal equipment of the master station in a wired or wireless way, and the feeder terminals transmit information to one another. Each feeder terminal automatically carries out opening, closing and fault identification work and uploads the determined fault type to the master station, the corresponding FA tester and the other feeder terminals through remote signaling according to a line current signal applied by the corresponding FA tester. Fault judgment is very accurate, and the correctness of feeder automation under different operating conditions can be verified.

Description

technical field [0001] The invention relates to a portable intelligent distributed feeder automatic test system, which belongs to the technical field of power distribution automation. Background technique [0002] According to the spiritual requirements of the National Development and Reform Commission and the Energy Bureau's "Distribution Network Construction and Transformation Action Plan (2015-2020)", the distribution automation system will be constructed in a large scale in the power system, and the feeder automation (hereinafter referred to as FA) technology is due to its The characteristics of being able to quickly and accurately isolate faults and restore non-fault areas will be vigorously promoted in power systems. With the wide application of feeder automation technology in power systems, how to ensure and exert its own functional advantages will also be a key issue for distribution systems. Current research hotspots of electrical automation detection. Most of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08G01R31/00
Inventor 潘建兵王华云徐在德曹蓓郑蜀江刘洋安义蔡木良李博江刘蓓
Owner STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST
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