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Power supply control system

A technology for power supply control and control circuit, applied in electrical components, circuit devices, emergency power supply arrangements, etc., can solve problems such as contactor burnout, furnace shutdown accidents, etc., to avoid parallel operation and improve anti-interference effects.

Inactive Publication Date: 2015-10-21
SHANGHAI GAOQIAO SGPEC PETROCHEM ENG & CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On-site actual measurement, when factory transformer 5 and factory transformer 6 are run by the generator with 6KV bus, and the other is run by the main transformer rewinding the 6KV bus, the pressure difference reaches 20V. If R is calculated as 0.2 ohms, the circulating current will be 100A, plus each power supply with 4 powder feeders, the load current is 30A, and the load current of each contactor is 130A, which is far beyond the rated current of the contactor, which will inevitably cause the contactor to burn out and cause Accident

Method used

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Embodiment Construction

[0035] The present invention will be further elaborated below by describing a preferred specific embodiment in detail in conjunction with the accompanying drawings.

[0036] Such as image 3 As shown, a power supply control system includes; a wiring circuit 1, which includes: a first switch K1C, a second switch K2C connected in parallel with the first switch K1C, and a first AC contactor 1C connected to the first switch K1C , and the second AC contactor 2C connected to the second switch K2C, wherein the first AC contactor 1C controls the opening / closing of the first switch K1C, and the second AC contactor 2C controls the The above-mentioned second switch K2C is on / off; the models of the first AC contactor and the second AC contactor in this embodiment are LC1D65Q7C.

[0037] A control circuit 2, which is connected to the first and second AC contactors (1C, 2C), used to collect the position signals of the first and second AC contacts (1C, 2C), and send corresponding jump / close...

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PUM

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Abstract

The invention discloses a power supply control system comprising a wiring circuit and a control circuit. The wiring circuit includes a first switch, a second switch connected in parallel with a first switch, a first alternating-current contactor connected with the first switch, and a second alternating-current contactor connected with the second switch, wherein the first alternating-current contactor controls on-off of the first switch, and the second alternating-current contactor controls on-off of the second switch. The control circuit is connected with the first and second alternating-current contactors, and is used to acquire position signals of the first and second alternating-current contactors and then send a corresponding tripping / closing instruction. According to the invention, the control logic of one power supply can be added with the already-run control logic of the other power supply, so that parallel running of the two power supplies is avoided, and the anti-interference performance of the control system is improved.

Description

technical field [0001] The invention relates to the field of reliable power supply applications, in particular to a power supply control system. Background technique [0002] In the power plant, the powder feeder is the key equipment for the boiler to provide raw coal powder for combustion, and the power supply for the powder feeder is to provide power for the powder feeder. Fluctuations or power outages of the powder feeding power supply will cause the powder feeding machine to stop, which will start the FSS (Boiler Safety Monitoring System) signal of fuel loss, which will cause the MFT action of the FSS system, and the boiler will shut down unplanned, resulting in generator failure. Downtime affects heating and power generation. [0003] figure 1 This is the primary system diagram of the powder supply power supply, in which the power supply 1C A and 2C A are mutually interlocked standby in the power control system, and the power supplies 1C B and 2C B are also mutually i...

Claims

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Application Information

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IPC IPC(8): H02J9/06
Inventor 赵森陶显忠曹君明夏勤
Owner SHANGHAI GAOQIAO SGPEC PETROCHEM ENG & CONSTR
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