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Accident security power supply circuit and switch method thereof

A security power supply and accident technology, applied in circuit devices, emergency power supply arrangements, electrical components, etc., can solve problems such as threats to the safety of power plants, inability to complete switching, and long switching times for circuit breakers.

Active Publication Date: 2014-12-03
内蒙古电力勘测设计院有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Frequent operation will reduce the service life
And the switching time of the circuit breaker is long, if the external control power supply is lost, the switching will not be completed, especially when the working power supply is lost in an accident, the switching failure will threaten the safety of the power plant

Method used

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  • Accident security power supply circuit and switch method thereof
  • Accident security power supply circuit and switch method thereof

Examples

Experimental program
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Embodiment Construction

[0027] figure 1 and figure 2 In the circuit diagrams of , the same reference numerals denote the same components. Such as figure 2 As shown, the accident security power supply circuit proposed by the present invention includes diesel generator set 1, working PC A section 2, working PC B section 3, security PC A section 4, security PC B section 5, switches 31-34, 41- 43, 51, 52, 61, 62 and cables connecting the above components.

[0028] Wherein, the switch 42 is the outlet switch of the diesel generator set 1; the switches 32 and 33 are the working power feeder switches of the security PC A segment 4 and the B segment 5 respectively, and the working power comes from the working PC A segment 2 and the B segment 3 respectively; the switch 31 and 34 are respectively the backup power feeder switches of security PC B section 5 and A section 4, and the backup power comes from working PC A section 2 and B section 3 respectively; switches 41 and 43 are respectively the diesel oil...

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Abstract

The invention provides an accident security power supply circuit and a switch method thereof, and belongs to the technical field of circuit design. In the accident security power supply circuit, a sixth switch is an outlet switch of a diesel power generation set; a second switch and a third switch are work power supply feeder switches of security PC A section and B section respectively, and working power supplies are from work PC A section and B section respectively; a first switch and a fourth switch are standby power supply feeder switches of the security PC B section and A section respectively, and standby power supplies are from the work PC A section and B section respectively; a fifth switch and a seventh switch are power supply wire inlet switches of the diesel power generation set of the security PC A section and B section respectively; en eighth switch and a ninth switch are work and standby power supply wire inlet switching switches of the security PC A section and B section respectively; and a tenth switch and an eleventh switch are work, standby and diesel power generation set power supply wire inlet switching switches of the security PC A section and B section respectively. The accident security power supply circuit and the switch method thereof have the advantages of easy wiring and highly-reliable switching and the like.

Description

technical field [0001] The invention relates to the technical field of circuit design, in particular to an accident safety power supply circuit and a switching method thereof. Background technique [0002] According to Article 3.0.6 of the "Technical Regulations on Power Design of Thermal Power Plants": "When a power outage occurs in the whole plant or a unit unit loses power, in order to ensure the safe shutdown of the unit, it can be restarted quickly afterwards. The load that needs to continue to supply power during a power outage for reasons such as starting, or in order to prevent personal safety from being endangered, is the accident safety load. For units with a capacity of 200MW and above, an AC security power supply should be installed. The accident safety power supply set up in the plant power system of the large unit system mostly uses diesel generators as the safety power supply. The accident safety power supply switch is divided into two working conditions: th...

Claims

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Application Information

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IPC IPC(8): H02J9/08
Inventor 陆浩白文光程伟科白雪松
Owner 内蒙古电力勘测设计院有限责任公司
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