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Self-recognition method for position state of interconnection switch of power distribution network

A tie switch, self-identification technology, applied in circuit devices, emergency protection circuit devices, electrical components, etc., can solve problems such as change lag and untimely response

Active Publication Date: 2022-03-08
GUIZHOU POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the distribution network, the contact switch is known as "fault cure". When there is a fault in the distribution network, the switch will be removed to isolate the fault. Due to the removal of the switch, the non-fault is also isolated, and the contact switch is closed. , can make normal power supply at non-fault areas, and reduce the impact of faults on power supply. The traditional distribution automation technology needs to manually set the position and state of the contact switch in the line according to the change of the grid operation mode, and its response is not timely and the change lags behind. and other issues will have a greater impact on the application of distribution automation functions

Method used

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  • Self-recognition method for position state of interconnection switch of power distribution network
  • Self-recognition method for position state of interconnection switch of power distribution network
  • Self-recognition method for position state of interconnection switch of power distribution network

Examples

Experimental program
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Effect test

Embodiment 1

[0041] refer to figure 1 and figure 2 , this embodiment provides a method for self-recognition of the position status of a distribution network tie switch, which includes:

[0042] S1: Set the selected switch 101 and keep the communication between the selected switch 101 and the adjacent switch 102 normal.

[0043] S2: Set the selected switch 101 to the opening position.

[0044] S3: The voltage on the power supply side and the load side of the selected switch 101 meets the amplitude. It should be noted that the voltage amplitude on the power supply side includes,

[0045] Keeping the amplitude of the secondary AC phase voltage on the line side of the selected switch 101 not less than the first set voltage value, or satisfying that the secondary side AC line voltage is not less than the second set voltage value;

[0046] The voltage amplitude on the load side includes,

[0047] Keeping the amplitude of the secondary AC phase voltage on the load side of the selected switch...

Embodiment 2

[0059] refer to Figure 3 to Figure 8 , this embodiment differs from the previous embodiment in that:

[0060] The distribution automation system includes a 220kV transformer 103, a 110kV transformer 104, and a ring main unit 105, and a ring main unit 105 is connected between the 220kV transformer 103 and the 110kV transformer 104.

[0061] The power distribution automation system also includes a connector 200 , which connects the 220kV transformer 103 to the ring main unit 105 , and the ring main unit 105 to the 110kV transformer 104 .

[0062] Preferably, the setting of the connecting piece 200 can realize quick connection and disassembly of the 220kV transformer 103 and the ring main unit 105, and between the ring main unit 105 and the 110kV transformer 104, which is convenient for inspection and maintenance of the line.

[0063] The connecting piece 200 includes a first connecting piece 201 , a second connecting piece 202 and a locking piece 203 . The first connecting pie...

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Abstract

The invention discloses a power distribution network interconnection switch position state self-identification method, which comprises the steps of setting a selected switch, and keeping normal communication between the selected switch and an adjacent switch; setting the selected switch to be located at an opening position; the power supply side voltage and the load side voltage of the selected switch meet the amplitude; and the distribution automation system automatically identifies whether the selected switch is an interconnection switch. According to the method, the mode that the position state of the interconnection switch in a line needs to be manually and correspondingly set according to the change of the operation mode of the power grid in the traditional power distribution automation technology is changed, and the position state of the interconnection switch of the power distribution network can be automatically identified by a corresponding power distribution automation system along with the change of the operation mode; the problems that response is not timely and change is lagged are solved.

Description

technical field [0001] The invention relates to the technical field of distribution network design, in particular to a method for self-recognition of the position and state of a distribution network tie switch. Background technique [0002] In the distribution network, the contact switch is known as "fault cure". When there is a fault in the distribution network, the switch will be removed to isolate the fault. Due to the removal of the switch, the non-fault is also isolated, and the contact switch is closed. , can make normal power supply at non-fault areas, and reduce the impact of faults on power supply. The traditional distribution automation technology needs to manually set the position and state of the contact switch in the line according to the change of the grid operation mode, and its response is not timely and the change lags behind. And other issues will have a greater impact on the application of distribution automation functions. Contents of the invention [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/28H02J13/00
CPCH02H7/28H02J13/0004Y02E60/00Y04S10/20
Inventor 宁楠杜林陶钢刘兴艳田滔王磊蔡宇宁
Owner GUIZHOU POWER GRID CO LTD
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