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Switch protection device for power source system for transformer substation

A technology of protection device and power source, applied in emergency protection circuit device, protection reacting to overcurrent, electrical components, etc., can solve problems such as failure to effectively avoid power output shutdown, failure to quickly and accurately isolate fault feed-out lines, etc. The effect of preventing power outages from expanding the scope of accidents, avoiding leapfrog tripping, and accurate isolation

Pending Publication Date: 2021-02-26
国网宁夏电力有限公司超高压公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] An embodiment of the present invention provides a switch protection device for a power source system used in a substation to solve the problem that the existing technology cannot quickly and accurately isolate faulty feeder lines, and cannot effectively avoid power output shutdown caused by short-circuit locking of the power electronic power source output

Method used

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  • Switch protection device for power source system for transformer substation
  • Switch protection device for power source system for transformer substation
  • Switch protection device for power source system for transformer substation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Figure 5 It is a typical application configuration of AC uninterruptible power supply system (UPS) used in substations, with only the first-level line group. The power source UPS1 and the power source UPS2 are two power electronic power sources with the same configuration. The first switch Q1 and the first switch Q2 are air switches at the output end of the power source. During normal operation, only one of the first switch Q1 and the first switch Q2 is in a closed state. The feeder lines L11-L18 are radially connected and are all connected to the same bus B1. The second switches Q11-Q18 are air switches for the feeder lines L11-L18 respectively.

[0052] Second current acquisition modules C1 and C2 are respectively installed at the output terminal LH1 of the power source UPS1 and the output terminal LH2 of the power source UPS2 to collect the total current output by the power sources UPS1 and UPS2. At each feeder line L11-L18 between the bus B1 and the second switc...

Embodiment 2

[0057] Such as Figure 7 As shown, the feeder line is a two-level branch sub-feeder radial connection mode. The first level line group is located in the main feeder panel. The second-level line group is located in the sub-feeder panel. The power source UPS1 is connected to the bus B1 of the first-stage line group, and the bus B1 is connected to each feeder line L11-L13. The output end of the power source UPS1 is connected to the first switch Q1, which is an air switch. The second switches Q11-Q13, which are air switches, are connected to the feed-out lines L11-L13. The feeder line L11 is connected to the bus bar B2 of the second-level line group. The bus B2 is connected to each feeder line L21-L22. The second switches Q21-Q22 are connected to the feeder lines L21-L22.

[0058] Specifically, the switch protection device corresponding to the first-level line group is equipped with a second current collection module C1 at the output terminal LH1 of the power source UPS1 to ...

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Abstract

The invention discloses a switch protection device for a power source system for a transformer substation. The switch protection device comprises at least one first current acquisition module, at least one shunt release and a main control module, wherein the input end of each first current acquisition module is connected between the bus and each second switch, the output end of each first currentacquisition module is connected with the main control module, each shunt release is connected with the main control module, each shunt release is arranged at each second switch, and each shunt releaseis connected with the main control module. Driving each second switch to jump off; when the switch protection device is used for the first-stage circuit group, the switch protection device further comprises at least one first electric operation module, each first electric operation module is connected with the main control module, and each first electric operation module is arranged at the position of each first switch and drives each first switch to be turned on and turned off. According to the invention, the power source output short-circuit current characteristics can be accurately identified, and the fault feed-out line can be rapidly cut off.

Description

technical field [0001] The invention relates to the technical field of switch protection, in particular to a switch protection device used in a power source system for a substation. Background technique [0002] The power source system for substations provides power sources for important equipment and related operations such as monitoring system computers, measurement and control equipment, relay protection devices, safety automatic devices, emergency lighting, emergency power sources, and circuit breaker opening / closing operations. component. [0003] The AC uninterruptible power source system (UPS) and DC power source system in the power source system for substation generally use thyristor (SCR), bipolar power transistor (GTR), metal oxide half field effect transistor (MOSFET) or insulation Power electronic devices such as gate bipolar transistors (IGBTs). The short-circuit withstand time of these power electronic devices is short, and short-term output overcurrent may c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/26H02H3/08
CPCH02H7/26H02H3/08
Inventor 陆洪建杨晨刘志远赵欣洋邹洪森李宁安燕杰陈昊阳黄欣崔鹏尹琦云于晓军梁守硕赵健罗勇林恒侯亮秦有苏徐天书张思齐尹磊朱颖孟腾龙唐鑫杨稼祥王思仇利辉赵希洋李磊叶涛李敏靳武张璞许云龙李伟杨子婧白明俊王玄之马杨杜巍刘亮陈效矛张玄洋吴明凯包彤
Owner 国网宁夏电力有限公司超高压公司