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Accident safety power supply circuit and its switching method

A security power supply and accident technology, applied in circuit devices, emergency power supply arrangements, electrical components, etc., can solve problems such as reducing service life, threatening the safety of power plants, and failing to complete switching.

Active Publication Date: 2017-06-23
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 safety power supply circuit and its switching method
  • Accident safety power supply circuit and its switching method

Examples

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Embodiment Construction

[0027] figure 1 with 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 PCB 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 diesel generators of securi...

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Abstract

An accident safety power supply circuit and a switching method thereof are proposed, which belong to the technical field of circuit design. In the accident security power supply circuit, the sixth switch is the outlet switch of the diesel generator set; the second switch and the third switch are the working power feeder switches of the security PC A segment and B segment respectively, and the working power comes from the working PC A respectively section and section B; the first switch and the fourth switch are the backup power feeder switches of section B and section A of the security PC respectively, and the backup power comes from section A and section B of the working PC respectively; the fifth switch, the seventh switch and the eighth switch And the ninth switch, the tenth switch and the eleventh switch are respectively the power inlet switch of the diesel generator set of the security PC section A and B section, the work and standby power supply inlet changeover switch, the work, standby and diesel generator set power supply inlet switch. Line toggle switch. The invention has the advantages of simple wiring and high switching reliability.

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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Patent Type & Authority Patents(China)
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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