CN103257604B - Based on low temperature aerogenerator protection controller and the method for Cortex-m3 processor - Google Patents
Based on low temperature aerogenerator protection controller and the method for Cortex-m3 processor Download PDFInfo
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- CN103257604B CN103257604B CN201210524839.6A CN201210524839A CN103257604B CN 103257604 B CN103257604 B CN 103257604B CN 201210524839 A CN201210524839 A CN 201210524839A CN 103257604 B CN103257604 B CN 103257604B
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Abstract
The present invention discloses a kind of low temperature aerogenerator protection controller based on Cortex-m3 processor and method, first, second sensor is injected to the continuous current of more than 1mA, censor key is switched in first sensor state external temperature thermometric, be switched to testing inner temperature on the second sensor states, first, second sensor signal measured through instrument amplifier amplify, A/D converter conversion after by Cortex-m3? temperature value is converted to after arm processor computing calibration; In heating arrangement, optocoupler drives big current controllable silicon, Cortex-m3? arm processor sends Continuity signal to heating arrangement, big current controlled silicon conducting, and heater strip starts heating, rotor is heated, and controls the current effective value that silicon controlled conduction angle controls controllable silicon and heater strip; For the different operating mode of each parts of low temperature aerogenerator, the different warm areas of each component working can be set, meet control overflow.
Description
Technical field
The present invention relates to generator unit protection controller, implement to control the temperature of the aerogenerator under condition of ultralow temperature and multipoint mode combined network communication and remote monitoring.
Background technology
The region of wind-power electricity generation concentrates on high latitude mostly, high altitude localities, and worst cold case is severe.If rotor is force start at low temperatures, the premature wear of meeting accelerating rotor, shortens the serviceable life of Wind turbines greatly.And use high-end synthetic metals material, inevitable expanded motor manufacturing cost again.Ordinary temp sensor in traditional wind group protection controller often causes measuring accuracy deviation comparatively large under low temperature rugged surroundings, and the stability of test is not high.The controller processor extreme portions selected all can not adapt to exceedingly odious low temperature environment, causes whole controller response speed excessively slow.If timely to rotor preheating, the damage of aerogenerator can not can be caused time serious for a long time.
Summary of the invention
The object of the invention is for overcoming the deficiencies in the prior art, a kind of intelligence, efficient, stable is provided
based on Cortex-m3 processorthe control method of low temperature aerogenerator protection controller and this controller, can improve the working condition of motor, reduces maintenance of motor cost of upkeep, increases the service life.
The present invention
based on Cortex-m3 processorthe technical scheme that low temperature aerogenerator protection controller adopts is: constant current source interface channel switch, censor key connects low temperature Pt100 type first, second sensor of thermal resistance and instrument amplifier respectively, instrument amplifier connects Cortex-m3ARM processor by A/D converter, Cortex-m3ARM processor connects heating arrangement, Ethernet interface, display module and alarm module respectively, and Ethernet interface connects PC; Heating arrangement is composed in series by optocoupler, big current controllable silicon, fuse, heater strip, heating power supply, and Cortex-m3ARM processor connects optocoupler one pin, and another pin of optocoupler connects big current controllable silicon.
The present invention
based on Cortex-m3 processorthe technical scheme that the control method of low temperature aerogenerator protection controller adopts has following steps:
1) first, second sensor is injected to the continuous current of more than 1mA, censor key is switched in first sensor state external temperature thermometric, be switched to testing inner temperature on the second sensor states, first, second sensor signal measured converts temperature value to after being calibrated by Cortex-m3ARM processor calculating after instrument amplifier amplification, A/D converter conversion;
2) inside and outside temperature difference of the low temperature aerogenerator after conversion reaches the threshold value of algorithm setting, and Cortex-m3ARM processor sends working signal according to the temperature-measuring results of sensor and algorithm process to holding heating arrangement;
3) in heating arrangement, optocoupler drives big current controllable silicon, Cortex-m3ARM processor sends Continuity signal to heating arrangement, big current controlled silicon conducting, and heater strip starts heating, rotor is heated, and controls the current effective value that silicon controlled conduction angle controls controllable silicon and heater strip;
4) temperature detected is transferred to PC by after the process of Cortex-m3ARM processor through Ethernet interface, shows in real time in display module;
5), during first, second sensor abnormality, Cortex-m3ARM processor controls alarm module sound and light alarm.
The invention has the beneficial effects as follows:
1, adopt that processing speed is fast, Cortex-m3ARM processor that low-power consumption, performance are powerful, not only possess the high reliability of technical grade and the adaptive faculty of complex environment, and can for the different operating mode of each parts of low temperature aerogenerator, set the different warm areas of each component working, considerably improve the control model of single channel, fixing warm area, meet the control overflow of low temperature Wind turbines.The temperature data multiple spot distributing communication realizing wind power generating set and the monitoring of the ethernet interface of Cortex-m3ARM processor and ICP/IP protocol Development Framework low cost can be utilized equally.
2, for ensureing the measuring accuracy of platinum resistance in low-temperature space and job stability, adopting four-wire system temperature-measurement principle and improving composition proportion and the welding manner of platinum resistance, utilizing two component spot-welding technology to solve platinum sensor thermometric precision problem.Make platinum sensor accurately can measure the ultralow temperature of-150 DEG C.
3, wind power generating set works under cryogenic; want to make each parts of low temperature aerogenerator return to optimum working temperature in the short time; then need to use big current digital switch to control heater strip, thus in the short time, improve response speed and the effective utilization of protection system.
4, structure of the present invention is simple, reasonable in design, dependable performance, and thermometric is more accurate, processor chips are reliable, rotor returns to optimum working temperature in the short time.
Accompanying drawing explanation
Fig. 1 is hardware configuration connection layout of the present invention.
Fig. 2 is four-wire system Pt100 type thermal resistance sensor schematic diagram of the present invention.
Fig. 3 is four-wire system Pt100 type thermal resistance sensor temperature measurement circuit schematic diagram of the present invention.
Fig. 4 is multi-point communication of the present invention and monitoring schematic diagram.
Fig. 5 is heating arrangement circuit theory diagrams of the present invention in Fig. 1.
In figure: 1. constant current source; 2. censor key; 3,4. sensor; 5. instrument amplifier; 6.A/D converter; 7.Cortex-m3ARM processor; 8. heating arrangement; 9. Ethernet interface; 10. display module; 11. alarm modules; 801. optocoupler; 802. big current controllable silicons; 803. fuse; 804. heater strip; 805. heating power supply;
Embodiment
As shown in Figure 1, the present invention is made up of hardware components and software section.Wherein, the constant current source 1 interface channel switch 2 of hardware components, censor key 2 is connecting sensor 3, sensor 4 and instrument amplifier 5 respectively.Instrument amplifier 5 connects Cortex-m3ARM processor 7 by A/D converter 6.Cortex-m3ARM processor 7 connects heating arrangement 8, Ethernet interface 9, display module 10 and alarm module 11 respectively.LCD display module 10 can show aerogenerator internal and external temperature in real time, can control rapidly heater strip and heat protection to aerogenerator; Sound and light alarm is carried out when sensor degradation or other faults.The control algolithm of software section controller has two cover algorithms, fuzzy algorithm and self-regulated PID control algorithm, in order to use under varying environment and situation.If need can select fuzzy algorithm, if can self-setting PID arithmetic be selected when will realize accurate temperature controlling when efficient control fast.
Constant current source 1 injects the electric current of more than 1mA, censor key 2 is switched in sensor 3 state, use low temperature Pt100 type thermal resistance sensor, thermometric is carried out to external temperature, testing sensor connects disconnected voltage difference, and instrument amplifier 5 carries out amplification process to the sensor minute analog electric signal measured and delivers in A/D converter 6 and process.In like manner, censor key 2 is switched in sensor 4 state, can testing inner temperature.Here censor key 2 light-metal-oxide-semiconductor of using Panasonic up-to-date, can automatically switch, avoid the low life problems of mechanical switch, have simultaneously and switch suitable high insulating property with mechanical type.
As Fig. 2 and Fig. 3, four-wire system Pt100 thermal resistance sensor temperature-measurement principle is: constant current source 1 provides steady current to additional testing line a and d, b and c tests the pressure drop on unknown resistance, temperature value is converted to after being calibrated by Cortex-m3ARM processor 7 computing after instrument amplifier 5 and A/D converter 6 are changed, the inside and outside temperature difference of the low temperature aerogenerator after conversion reaches the threshold value of algorithm setting, and Cortex-m3ARM processor 7 sends working signal according to the temperature-measuring results of sensor and algorithm process to holding heating arrangement 8.The error adopting the advantage of four-wire system method of testing to be effectively to offset p-wire to bring to measuring accuracy, can keep high-acruracy survey when extension sensor line is very long.
What A/D converter 6 used is the delta-sigma type A/D converter of Sin4 filter function, and resolution is 12, and slewing rate is 100ns, can effectively suppress high frequency noise and Hz noise.Arm processor adopts Cortex-m3 chip, and its speed is low in energy consumption soon.Censor key 2 automatic wheel current test aerogenerator internal and external temperature, the digital signal after A/D conversion is by the process of Cortex-m3ARM processor 7 software algorithm, and display module 10 shows the internal and external temperature value of the aerogenerator calculated.Wind power generating set needs multiple low-temperature protection controller usually, and each controller is by Ethernet interface 9 transmitting monitor data to long-range PC, and PC is through Ethernet interface 9 real-time reception checking monitoring temperature data, and user can realize remote monitoring.As shown in Figure 4.
The difficult point of heating arrangement 8 is the problem that can solution heater strip heat rapidly.As shown in Figure 5, heating arrangement 8 of the present invention light-coupled isolation and heating two parts composition, be specifically composed in series by optocoupler 801, big current controllable silicon 802, fuse 803, heater strip 804, heating power supply 805.The GPIO mouth of Cortex-m3ARM processor 7 connects the pin 2 in optocoupler 801, and pin 3 meets the pin G of big current controllable silicon 802.Cortex-m3ARM processor 7 carries out fuzzy algorithm process according to measuring tempeature, when external temperature is lower than internal temperature 5 DEG C, the GPIO of Cortex-m3ARM processor 7 sends the pulse signal of conducting, the instant triggering and conducting of big current controllable silicon 802, at this moment the whole circuit connected in series of big current controllable silicon 802, fuse 803, heater strip 804 and heating power supply 805 forms heating arrangement loop.Heating power supply 805 is started working, and electric current flows through heater strip 804, and heater strip 804 starts heating, and rotor is able to rapid temperature increases heating.When motor internal temperature is higher than external temperature 15 DEG C, the GPIO mouth of Cortex-m3ARM processor 7 sends the pulse signal of shutoff, and big current controllable silicon 802 turns off, and loop disconnects rapidly, and heater strip stops heating.If heating arrangement sends accidental short circuit, fuse 803 disconnects, and protects whole equipment safety reliability service.Heating arrangement of the present invention controls delay time by FUZZY ALGORITHMS FOR CONTROL, changing pulse signal, driving change silicon controlled conduction angle through optocoupler by changing delay time, changes and controls current effective value thus the thermal value further controlling heater strip.
Alarm module 11 is when short circuit sensor or open circuit, and controller carries out sound and light alarm.
Workflow of the present invention is: hardware components sensor 3 and sensor 4 detect aerogenerator internal and external temperature respectively, via instrument amplifier and A/D modular converter, signal is sent into Cortex-m3ARM processor 7, the control algolithm of processor inside controls heating arrangement.When external temperature is lower than internal temperature 5 DEG C, Cortex-m3ARM processor 7 sends Continuity signal via optocoupler to big current controllable silicon, and after series connection conducting, heating power supply and heater strip form loop, and heater strip starts heat temperature raising.When motor internal temperature stops higher than heating during external temperature 15 DEG C.Temperature difference threshold value can be set by software programming, and general needs environmentally arranges controller algorithm and setting monitoring temperature with the difference of weather.Censor key 2 automatically switches on sensor 3 or sensor 4 and continues to detect aerogenerator internal and external temperature, and signal is transferred to equally in Cortex-m3ARM processor 7 and carries out algorithm process.Meanwhile, by the interface 9 of Ethernet, main frame can detect the temperature regime of every platform generator the moment, display module 10 also can show in real time the temperature value inside and outside motor.Sensor occurs that abnormal alarm module 11 sends sound and light alarm.
The present invention adopts modular design, utilize two kinds of different content platinum wires and low temperature spot-welding technology, platinum sensor accurately can measure the ultralow temperature of-150 DEG C, and utilizes advanced Cortex-m3ARM processor to control heating arrangement, improves heated slow problem.And in technique, adopt SMT paster welding technology, stable and reliable for performance, with low cost.By the Cortex-m3ARM processor ethernet interface of protection controller inside and ICP/IP protocol, multiple spot distributing communication and monitoring are realized to genset temperature environment situation.
Claims (1)
1. the low temperature aerogenerator protecting control method based on Cortex-m3ARM processor, adopt the low temperature aerogenerator protection controller based on Cortex-m3ARM processor, this protection controller has constant current source (1), constant current source (1) interface channel switch (2), censor key (2) connects first of low temperature Pt100 type thermal resistance respectively, second sensor (3, 4) and instrument amplifier (5), instrument amplifier (5) connects Cortex-m3ARM processor (7) by A/D converter (6), Cortex-m3ARM processor (7) connects heating arrangement (8) respectively, Ethernet interface (9), display module (10) and alarm module (11), Ethernet interface (9) connects PC, heating arrangement (8) is composed in series by optocoupler (801), big current controllable silicon (802), fuse (803), heater strip (804), heating power supply (805), Cortex-m3ARM processor (7) connects optocoupler (801) pin, optocoupler (801) another pin connects big current controllable silicon (802), it is characterized in that having following steps:
1) first, second sensor (3,4) is injected to the continuous current of more than 1mA, censor key (2) is switched in first sensor (3) state external temperature thermometric, be switched to testing inner temperature in the second sensor (4) state, first, second sensor (3, the 4) signal measured converts temperature value to after being calibrated by Cortex-m3ARM processor (7) computing after instrument amplifier (5) amplification, A/D converter (6) conversion;
2) inside and outside temperature difference of the low temperature aerogenerator after conversion reaches the threshold value of algorithm setting, and Cortex-m3ARM processor (7) sends working signal according to the temperature-measuring results of sensor and algorithm process to holding heating arrangement (8);
3) heating arrangement (8) interior optocoupler (801) drives big current controllable silicon (802), Cortex-m3ARM processor (7) sends Continuity signal to heating arrangement (8), big current controllable silicon (802) conducting, heater strip (804) starts heating, rotor is heated, and controls the current effective value that silicon controlled conduction angle controls controllable silicon and heater strip;
4) temperature detected is transferred to PC through Ethernet interface (9) after being processed by Cortex-m3ARM processor (7), and display in display module (10) in real time;
5), when first, second sensor (3,4) is abnormal, Cortex-m3ARM processor (7) controls alarm module (11) sound and light alarm.
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| CN104581058B (en) * | 2014-12-25 | 2019-05-31 | 齐咏生 | A kind of fan signal collector |
| DE102016014130B3 (en) * | 2016-11-25 | 2017-11-23 | Isabellenhütte Heusler Gmbh & Co. Kg | Current measuring device |
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| CN2553413Y (en) * | 2002-07-12 | 2003-05-28 | 成都彩虹电器（集团）股份有限公司 | Digital program controller for domestic flexible electric heater |
| CN101334638A (en) * | 2007-06-29 | 2008-12-31 | 上海电气风电设备有限公司 | Heating controller of normal temperature wind field measuring device heater under low temperature |
| US8055468B1 (en) * | 2007-08-17 | 2011-11-08 | Keithley Instruments, Inc. | Output leakage compensation and method for implementing the same |
| EP2395621A1 (en) * | 1999-03-12 | 2011-12-14 | Eaton Corporation | Thermal compensation control for a motor starter |
| CN202221538U (en) * | 2011-08-17 | 2012-05-16 | 陕西科技大学 | Cabin intelligent constant temperature controller of wind generator |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2395621A1 (en) * | 1999-03-12 | 2011-12-14 | Eaton Corporation | Thermal compensation control for a motor starter |
| CN2553413Y (en) * | 2002-07-12 | 2003-05-28 | 成都彩虹电器（集团）股份有限公司 | Digital program controller for domestic flexible electric heater |
| CN101334638A (en) * | 2007-06-29 | 2008-12-31 | 上海电气风电设备有限公司 | Heating controller of normal temperature wind field measuring device heater under low temperature |
| US8055468B1 (en) * | 2007-08-17 | 2011-11-08 | Keithley Instruments, Inc. | Output leakage compensation and method for implementing the same |
| CN202221538U (en) * | 2011-08-17 | 2012-05-16 | 陕西科技大学 | Cabin intelligent constant temperature controller of wind generator |
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Effective date of registration: 20201130 Address after: 213311 building 7, No. 8-2, Dutou street, Daitou Town, Liyang, Changzhou City, Jiangsu Province Patentee after: Liyang Chang Technology Transfer Center Co.,Ltd. Address before: Gehu Lake Road Wujin District 213164 Jiangsu city of Changzhou province No. 1 Patentee before: CHANGZHOU University |
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