Microcontroller-based fan overspeed protection device and safety chain action method
A micro-controller and overspeed protection technology, which is applied in the control of wind turbines, machines/engines, wind turbines, etc., can solve the problems of difficult data analysis of FPGA protection devices and low measurement accuracy of microcontrollers, and facilitate embedded expansion , the effect of facilitating data analysis
Inactive Publication Date: 2015-02-04
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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[0003] In view of the deficiencies in the prior art, in order to solve the problems of low measurement accuracy of existing microcontrollers and difficult data analysis using FPGA protection devices, the present invention provides an overspeed detection method based on microcontrollers and a data analysis solution based on serial ports :
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[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0026] The hardware technical scheme that the present invention solves its technical problem adopts is: the interrupt pin of microcontroller is connected with optocoupler, optocoupler is connected with external metal sensor, the IO input pin of microcontroller is connected with encoding switch, and the interrupt pin of microcontroller is connected with optocoupler. The IO output pin is connected to the triode, the triode is connected to the relay, the relay is connected to the external safety chain, the serial port of the microcontroller is connected to the max232 chip, and the crystal oscillator of the microcontroller ensures that the machine cycle of the microcontroller can be controlled by 10 -6 divisible.
[0027] The software technical scheme that the present invention solves its technical problem adopts is: when the interrupt pin of micr...
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The invention relates to a microcontroller-based fan overspeed protection device and a safety chain action method. The microcontroller-based fan overspeed protection device comprises a microcontroller, an optocoupler, a coding switch, a serial level switching chip, a triode and a relay. The safety chain action method comprises the following steps of: initializing the microcontroller; reading an overspeed set value; calculating an actual rotating speed value; and judging whether overspeed occurs. The detection precision of the microcontroller-based fan overspeed protection device exceeds that of the existing FPGA (Field Programmable Gate Array) by 0.1Hz and reaches 0.01Hz; and the microcontroller-based fan overspeed protection device brings the convenience for embedded expansion, and is capable of outputting real-time data for bringing the convenience for data analysis.
Description
technical field [0001] The invention relates to the technical field of wind power, in particular to a fan overspeed protection device and a safety chain action method. Background technique [0002] my country has relatively rich wind energy resources. With the promulgation of the "Renewable Energy Law" and a series of subsequent policies, the state has given support and encouragement to wind power generation from various aspects, and my country's wind power industry has entered a stage of rapid development. The safety chain system in wind power generation is the most important thing in the whole system, so the overspeed protection of wind turbines is also very important. At present, most domestic overspeed protection devices are implemented by FPGA, which is popular with users for its fast response speed and measurement accuracy. When the speed frequency is 100Hz, the accuracy can reach 0.1Hz. However, the cost of FPGA is relatively high, and the current debugging needs to ...
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IPC IPC(8): F03D7/00
CPCY02E10/723Y02E10/72
Inventor 杜劲松徐洪庆丛日刚张清石刘意杨
Owner SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI