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Method and device for controlling MFT (Main Fuel Trip)

A technology for controlling equipment and equipment, applied in the direction of comprehensive factory control, comprehensive factory control, electrical program control, etc., can solve the problem of boiler full fuel loss MFT main protection action, etc., to ensure normal production operations, reliable control logic, and avoid errors The effect of protective action

Inactive Publication Date: 2014-01-08
CHINA SHENHUA ENERGY CO LTD +2
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

The defect of the existing technology is that when the power supply of the fire detection probe is abnormal, the fire detection probe will detect an abnormal signal, which will also trigger the boiler full fuel loss MFT main protection action, but this MFT main protection action Not as expected in genset operation

Method used

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  • Method and device for controlling MFT (Main Fuel Trip)
  • Method and device for controlling MFT (Main Fuel Trip)
  • Method and device for controlling MFT (Main Fuel Trip)

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Embodiment Construction

[0046] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0047] During the production operation of the power plant, the power supply may be abnormal, which will cause the flame detection probes to not work normally, and if the detection results of all the flame detection probes are abnormal, it may lead to the loss of all flames. MFT has a protection action, which has a negative impact on the entire production operation.

[0048] In order to solve this problem, the present invention provides an MFT control device, which includes an OR gate, the combustion flame loss signal and the power supply loss signal are used as the input signals of the OR gate, and the output terminal of the OR gate is connected to the boiler fu...

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Abstract

The invention discloses a method and a device for controlling MFT (Main Fuel Trip). The device comprises an OR gate, wherein a combustion flame loss signal and a power supply loss signal are used as input signals of the OR gate, and an output end of the OR gate is connected with all-flame loss MFT of a boiler. According to the method and the device, disclosed by the invention, main protection control logic of the all-flame loss MFT can be more reliable, a mis-operation action caused by an abnormal situation of a power supply can be avoided, and thus the normal production operation of a power station can be ensured.

Description

technical field [0001] The present invention relates to the field of power generation, in particular to a main combustion trip (MFT) control method and equipment. Background technique [0002] In a thermal power generation unit, the general boiler burners are arranged from bottom to top according to A mill, AB oil gun, B mill, C mill, CD oil gun, D mill, E mill, EF oil gun, F mill, and burn on each floor. Flame detection sensors are respectively arranged on the boiler, for example, arranged at the four corners of the boiler to monitor the flame combustion situation at each corner of each layer. The power supply of the fire detection probe adopts a redundant design. The UPS power supply 101 (220V AC voltage) is converted into 24V DC voltage through the first AC / DC conversion circuit 105, and the security power supply 103 (220V AC voltage) is converted into 24V DC voltage through the second AC / DC conversion circuit 107. voltage) into 24V DC voltage, and the two 24V DC power s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/418
CPCY02P90/02
Inventor 魏向国
Owner CHINA SHENHUA ENERGY CO LTD
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