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Outgoing line voltage maintenance method, device and system for distribution network

A voltage maintenance and power distribution network technology, applied in the electrical field, can solve the problems of low safety of power distribution network operation, achieve the effect of ensuring safe operation and solving low safety

Active Publication Date: 2019-06-11
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a method, device and system for maintaining the outlet voltage of a power distribution network, so as to at least solve the technical problem of low operating safety of the power distribution network caused by the use of the existing technology

Method used

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  • Outgoing line voltage maintenance method, device and system for distribution network
  • Outgoing line voltage maintenance method, device and system for distribution network
  • Outgoing line voltage maintenance method, device and system for distribution network

Examples

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Embodiment 1

[0030] According to an embodiment of the present invention, an embodiment of a method for maintaining the outgoing line voltage of a power distribution network is provided, such as image 3 As shown, the method includes:

[0031] S302, detecting whether at least one outgoing cable in the set of outgoing cables connected to the main busbar of the power distribution room is faulty, wherein the set of outgoing cables includes one or more outgoing cables;

[0032] S304, if it is detected that at least one outgoing cable in the outgoing cable set is faulty, then control other outgoing cables except at least one outgoing cable in the outgoing cable set to connect to the outgoing voltage maintenance device of the power distribution network, wherein, in each outgoing cable At least one outgoing line voltage maintenance device is equipped in the outgoing line cabinet on the cable;

[0033] S306. Maintain the outgoing line voltage of the main bus bar in the power distribution room thro...

Embodiment 2

[0056] According to an embodiment of the present invention, an embodiment of an outgoing line voltage maintaining device of a power distribution network is provided. The outgoing line voltage maintaining device is located in an outgoing line cabinet on each outgoing cable in the set of outgoing lines connected to the main bus bar of the power distribution room, wherein , the set of outgoing cables includes one or more outgoing cables, such as Figure 4 As shown, the outlet voltage maintenance device includes:

[0057] 1) Control switch 402, used to control the connection of the reactor to the outgoing cable where the outgoing line voltage maintenance device is located;

[0058] 2) Reactor 404, one end is connected to the outgoing cable, and the other end is connected to the outgoing cable through a control switch.

[0059] Optionally, in this embodiment, the above-mentioned outgoing line voltage maintenance device of the power distribution network can be applied to, but not l...

Embodiment 3

[0071] According to an embodiment of the present invention, an embodiment of an outlet voltage maintenance system of a power distribution network is provided, such as Figure 7 As shown, the system includes:

[0072] 1) Outgoing voltage maintaining devices 702 of one or more power distribution networks, at least one outgoing voltage maintaining device is arranged in the outgoing cabinet on each outgoing cable in the outgoing cable set connected to the main busbar of the power distribution room, wherein the outgoing line one or more outgoing cables are included in the cable set;

[0073] 2) One or more line protection devices 704, at least one line protection device is connected to each outgoing cable in the outgoing cable set, and the line protection device is connected in series with the outgoing voltage maintaining device on the outgoing cable;

[0074] 3) The detection control device 706 is connected with one or more outgoing line voltage maintaining devices and one or mor...

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PUM

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Abstract

The invention discloses a method, a device and a system for maintaining outlet voltage of a distribution network. The method comprises steps: whether at least one outlet cable in an outlet cable set connected with a distribution room main bus fails is detected, wherein the outlet cable set contains one or more outlet cables; if at least one outlet cable in the outlet cable set is detected to fail, the other outlet cables except the at least one outlet cable in the outlet cable set are controlled to be connected with outlet voltage maintaining devices in the distribution network, wherein the outlet cabinet on each outlet cable is internally configured with at least one outlet voltage maintaining device; and through the outlet voltage maintaining devices in the other outlet cables, the outlet voltage of the distribution room main bus is maintained. The technical problem of low operation security of the distribution network caused by adopting the prior art can be solved.

Description

technical field [0001] The present invention relates to the electrical field, in particular to a method, device and system for maintaining outlet voltage of a power distribution network. Background technique [0002] The power distribution network of petroleum and petrochemical enterprises is different from other power distribution networks. There are more loads on induction motors and higher requirements for safe operation. Therefore, the existing power distribution network of petroleum and petrochemical enterprises has complex line design and heavy grid load. When a short-circuit fault occurs on the line, due to the heavy load on the line, the line voltage will drop sharply in an instant, which will easily lead to a large drop in the line voltage of the entire network, and then cause the on-site high-voltage motor and frequency converter to stop, affecting oil field production. [0003] At present, the following measures are usually adopted to solve the above problems: fi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/12
Inventor 肖阳
Owner PETROCHINA CO LTD
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