Rapid protection system of electric power substation

A technology for protection systems and substations, applied in emergency protection circuit devices, electrical components, etc., to solve problems such as damage and long-term existence of short-circuit faults in feeder cabinets

Active Publication Date: 2015-06-17
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This makes short-circuit faults in feeder cabinets exist for a long time, often causing serious damage

Method used

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  • Rapid protection system of electric power substation
  • Rapid protection system of electric power substation
  • Rapid protection system of electric power substation

Examples

Experimental program
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Embodiment 2

[0070] image 3 What is shown is another schematic structural diagram of the main control unit provided by the embodiment of the present application.

[0071] Such as image 3 As shown, the main control unit may further include: a second trip circuit 14 , wherein: the second trip circuit 14 is connected to the current comparator 11 and the first trip circuit 13 respectively.

[0072] The second trip circuit is used to open the corresponding switch according to the comparison result of the current comparator 11 and the trip signal output by the first trip circuit 13 .

[0073] Specifically:

[0074] 4. When the current is abnormal and the first trip signal is detected, a fourth trip signal is generated and sent to the low-voltage side switch and the bus tie switch;

[0075] 5. When the current is abnormal and the second trip signal is detected, the fifth trip signal is generated and sent to the high-voltage side switch;

[0076] 6. When the current is abnormal and the third...

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Abstract

The invention discloses a rapid protection system of an electric power substation. The electric power substation comprises a main transformer, a back-up transformer, a bus, a bus coupling cabinet and a plurality of feeder line cabinets. The rapid protection system of the electric power substation is characterized by comprising a first current transformer, a high-voltage side switch, a low-voltage side switch, switch arc light probes, a first arc light relay extender, a second arc light relay extender, a bus coupling current transformer and a main control unit. The rapid protection system of the electric power substation has the advantage of being capable of performing power-off protection on the electric power substation according to matching of a detected arc light signal and detected current when any space among three independent space which are arranged inside the feeder line cabinets or the bus coupling cabinet is broken down due to the fact that a switch chamber, a bus chamber and a cable chamber which are arranged inside every feeder line cabinet and the bus coupling cabinet are provided with the switch arc light probes.

Description

technical field [0001] The present application relates to the technical field of relay protection for ground power systems, in particular to a fast protection system for substations. Background technique [0002] In the case of medium and low voltage bus faults, especially in the case of feeder cabinet power distribution devices, the arc may ignite the components in the feeder cabinet, causing a fire, causing a large area of ​​power distribution equipment to burn, and even destroying the DC system, resulting in more serious consequences. If fast protection is installed, the protection will act immediately after the fault occurs, and the fault will be cleared before the arc burns, and the power supply can be restored quickly, and the loss is greatly reduced. According to the rapidity of relay protection, in order to ensure the safe operation of transformers and bus tie switchgear, it is urgent to configure medium and low voltage busbar protection. [0003] In the power syste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/22
Inventor 董建达吴英俊丁北平陈琳灿王磊方云辉
Owner STATE GRID CORP OF CHINA
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