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Garbage power plant induced draft fan frequency conversion and power frequency switching control method

A control method and technology of induced draft fan, applied in the direction of AC motor control, motor speed or torque control, control system, etc., can solve the problems of boiler flameout, threatening the safe and stable operation of the unit, affecting the load, etc.

Inactive Publication Date: 2021-04-06
XIAN THERMAL POWER RES INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the inverter fails, on the one hand, it is easy to cause the induced draft fan to trip, which not only affects the load, but also causes huge economic losses. In severe cases, it even threatens the safe and stable operation of the unit. people's livelihood

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  • Garbage power plant induced draft fan frequency conversion and power frequency switching control method

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Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. ,

[0023] see figure 1 As shown, a control method for frequency conversion and power frequency switching of an induced draft fan in a garbage power plant provided by the present invention includes: mode 1, the control mode of frequency conversion and power frequency switching under the severe fault condition of the high-voltage frequency converter; mode 2, the normal operation condition of the high-voltage frequency converter Frequency conversion switch to power frequency control mode; mode 3, high-voltage inverter running under normal working conditions power frequency switch to variable frequency control mode.

[0024] The normal operation mode control method of the high-voltage frequency converter refers to a) manually combining the isolating switch QS1 of the variable-frequency incoming line module and the isolating switch QS2 of the vari...

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Abstract

The invention discloses a garbage power plant induced draft fan frequency conversion and power frequency switching control method which is based on a fan high-voltage frequency conversion and power frequency switching system comprising five modules, respectively, a power frequency power supply incoming line module, a high-voltage frequency conversion incoming line switch module, a high-voltage frequency conversion module, a high-voltage frequency conversion outgoing line switch module and a power frequency bypass switch module. The method comprises a high-voltage frequency converter severe fault working condition frequency conversion switching power frequency control mode, a high-voltage frequency converter operation normal working condition frequency conversion switching power frequency control mode and a high-voltage frequency converter operation normal working condition power frequency switching frequency conversion control mode. According to the system, safe and stable operation of a unit is met, and meanwhile, the livelihood problem that garbage can be treated in time is solved.

Description

technical field [0001] The invention belongs to the technical field of induced draft fans in power plants, and in particular relates to a frequency conversion and power frequency switching control method for induced draft fans in waste power plants. Background technique [0002] At present, the power of induced draft fans is mainly divided into two modes: motor drive and steam turbine drive. In order to reduce the power consumption rate of the plant, the induced draft fan driven by the motor of the garbage power plant generally adopts frequency conversion operation to achieve the purpose of saving energy and reducing consumption. [0003] Defects and deficiencies of the prior art: [0004] Considering that the high-voltage frequency converter is a complex system composed of power electronic devices, due to the environment. Various failures inevitably occur due to device aging and other reasons. When the inverter fails, on the one hand, it is easy to cause the induced draf...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P4/00H02P27/04H02J9/06
CPCH02P4/00H02P27/04H02J9/066
Inventor 方子朝张乃元何信林张文斌张钢李洲雷阳张灏
Owner XIAN THERMAL POWER RES INST CO LTD