CN102817778B - Method and device for preventing PLC (programmable logic controller) control system of fan from crashing - Google Patents
Method and device for preventing PLC (programmable logic controller) control system of fan from crashing Download PDFInfo
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- CN102817778B CN102817778B CN201210342945.2A CN201210342945A CN102817778B CN 102817778 B CN102817778 B CN 102817778B CN 201210342945 A CN201210342945 A CN 201210342945A CN 102817778 B CN102817778 B CN 102817778B
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000004891 communication Methods 0.000 claims description 36
- 239000013078 crystal Substances 0.000 claims description 3
- 230000007257 malfunction Effects 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 238000013461 design Methods 0.000 description 1
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- 230000002093 peripheral effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Safety Devices In Control Systems (AREA)
Abstract
The invention discloses a method and a device for preventing a PLC (programmable logic controller) control system of a fan from crashing. The method comprises the following steps: A. a spared PLC is added in the PLC control system of the fan; B. during the normal operation of a main control PLC, a heartbeat signal is sent out at regular intervals, and the spared PLC does not output command; C. the running situation of the main control PLC and a safety chain is determined through the heartbeat signal; D. when the main control PLC is determined to malfunction, and the safety chain is not started up, the spared PLC is started up, and the main control PLC is ordered to be in power failure; and E. an emergent shut-down program is started up for the spared PLC, and the fan shuts down. The device comprises a switching device and the spared PLC which is connected with the main control PLC through the switching device. According to the invention, when the main control PLC of a wind motor malfunctions and the safety chain malfunctions, a power supply of the main control PLC is disconnected, the bus control authority is realized for the spared PLC, emergent shut-down is realized, and the fan is prevented from 'crashing'.
Description
Technical field
The present invention relates to technical field of wind power generation, particularly relating to a kind of for preventing method and the device of blower fan PLC control system driving.
Background technique
Fan master control system is most important part in blower fan control system; master control system comprises PLC, theft-resistant link chain, variable blade control system and frequency converter control system; when PLC control system " driving "; namely directly theft-resistant link chain can be started when PLC deadlock or PLC execution speed are crossed slow; if now theft-resistant link chain itself goes wrong; frequency variator and change oarage cannot obtain theft-resistant link chain emergency-stop signal, and cannot shut down, this causes great potential safety hazard to whole wind-power generating system.
As can be seen here, prior art also exists significantly not enough and defect, therefore the theft-resistant link chain fault Puiescent, inoperative potential safety hazard that a kind of solution may cause because of main control PLC control system when main control PLC breaks down how is founded, prevent method and the device for preventing blower fan PLC control system driving of PLC control system " driving ", one of important topic of the current research and development of real genus.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of for preventing method and the device of blower fan PLC control system driving; make it in wind turbine main control PLC fault and theft-resistant link chain breaks down time; cut off main control PLC power supply; PLC for subsequent use realizes bus control right; realize emergency shutdown; avoid blower fan " driving ", thus overcome the deficiencies in the prior art.
For solving the problems of the technologies described above, the present invention is a kind of for preventing the method for blower fan PLC control system driving, comprises the following steps: A, in blower fan PLC control system, set up PLC for subsequent use; B, main control PLC normal work period, send a heartbeat signal at regular intervals, PLC for subsequent use not output order; C, judged the runnability of main control PLC and theft-resistant link chain by heartbeat signal; D, when judging main control PLC operation troubles, and when theft-resistant link chain does not start, start PLC for subsequent use, and make main control PLC power-off; E, PLC for subsequent use start emergency stopping procedures, fan parking.
As a further improvement on the present invention, judgement described in described step C is that the heartbeat signal number N of heartbeat signal number M main control PLC in the unit time sent when normally working with main control PLC compares, as M < N, then be judged as main control PLC fault, enter step D.
COMM communication is connected with between described main control PLC and PLC for subsequent use, heartbeat signal described in step B sends to theft-resistant link chain and this COMM communication simultaneously, the heartbeat signal number received, judges whether main control PLC breaks down, whether theft-resistant link chain starts and the power-off of instruction main control PLC, PLC for subsequent use start when main control PLC fault in this COMM communication unit of account time.
In addition, the present invention also provides a kind of and comprises COMM communication for preventing the device of blower fan PLC control system driving, and the PLC for subsequent use be connected with main control PLC by this COMM communication.
As a further improvement on the present invention, also comprise and control the main control PLC relay of powering, and be controlled by COMM communication and control the power module of this relay.
Described PLC for subsequent use and main control PLC are arranged on same backboard, and are connected on same bus.
Described COMM communication comprises single-chip microcomputer, theft-resistant link chain actuating signal input interface, main control PLC heartbeat signal input interface, PLC actuating signal output interface for subsequent use and power module control interface.
Described single-chip microcomputer is also connected with reset circuit and crystal oscillator.
After adopting above design, the present invention compared with prior art has following beneficial effect:
1, when PLC fault and theft-resistant link chain breaks down time, Beck-up Control System, after the instruction obtaining COMM communication, cuts off current controller power supply, and realizes bus control right by Beck-up Control System, realize blower fan emergency shutdown;
2, after realizing emergency shutdown with spare controller, meet even if play machine condition, controller can not enter machine state again, waits until fault and solves, and particularly theft-resistant link chain fault solves and after confirming, after replacing master controller, could again enter machine state.
Below by drawings and Examples, technological scheme of the present invention is described in further detail.
Accompanying drawing explanation
Above-mentioned is only the general introduction of technical solution of the present invention, and in order to better understand the present invention, below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.
Fig. 1 is the system composition schematic diagram that the present invention prevents blower fan PLC control system driving.
Fig. 2 is that the circuit of COMM communication of the present invention connects block diagram.
Fig. 3 is the circuit connection diagram of power module of the present invention.
Fig. 4 is that the present invention is for preventing the method flow schematic diagram of blower fan PLC control system driving.
Fig. 5 is the workflow diagram of the present invention PLC for subsequent use.
Embodiment
Refer to shown in Fig. 1, the present invention, for preventing the device of blower fan PLC control system driving, comprises COMM communication, and the PLC for subsequent use be connected with main control PLC by this COMM communication.
Wherein, shown in Fig. 2, COMM communication of the present invention comprises single-chip microcomputer and peripheral circuit composition thereof, for carrying out the shutoff of main control PLC power supply and calculating the number of heartbeat signal of main control PLC.COMM communication has four with outside interface: theft-resistant link chain actuating signal input interface, main control PLC heartbeat signal input interface, PLC actuating signal output interface for subsequent use and power module control interface.In addition, also can be single-chip microcomputer and connect reset circuit and crystal oscillator.The optocoupler of COMM communication is used for the 24V direct current of outside being converted to the applicable 5V direct current of single-chip microcomputer, or single-chip microcomputer 5V direct current is converted to the corresponding relay of 24V DC powered.
PLC for subsequent use can be arranged on same backboard with main control PLC, and is connected on same bus, also can connect several IO fasteners (comprising communication module) on the bus.In addition, the power module being controlled by COMM communication is also connected with between PLC for subsequent use and main control PLC.
Refer to shown in Fig. 3, the break contact of the relay that power module controls is serially connected in the power supply circuits of main control PLC, and after single-chip microcomputer sends cut-offing instruction, single-chip microcomputer IO exports and transfers 24V to through optocoupler, relay power, and break contact disconnects, main control PLC power-off.
Shown in Fig. 4, Fig. 5, the present invention, for preventing the method for blower fan PLC control system driving, comprises the following steps:
A, in blower fan PLC control system, set up PLC for subsequent use, between PLC for subsequent use and main control PLC, be connected with COMM communication and power module.After energising, two PLC all real time executions, PLC for subsequent use does not export any instruction.
B, main control PLC normal work period, send a heartbeat signal at regular intervals, and this heartbeat signal sends to the main control PLC heartbeat signal input interface of theft-resistant link chain and COMM communication simultaneously, and period, PLC for subsequent use does not still export any instruction.
C, judged the runnability of main control PLC and theft-resistant link chain by heartbeat signal.Specifically, by the heartbeat signal number received in the COMM communication unit of account time, heartbeat signal number N when heartbeat signal number M main control PLC in unit time sent again and main control PLC normally work compares, thus judges the runnability of main control PLC.Meanwhile, COMM communication is also connected with theft-resistant link chain,
D, judge main control PLC operation troubles when the single-chip microcomputer of COMM communication, and when theft-resistant link chain does not start, start PLC for subsequent use, and make main control PLC power-off.Specifically; when COMM communication calculates M < N; then be judged as main control PLC fault; if now COMM communication does not receive the actuating signal of theft-resistant link chain; then give PLC for subsequent use signal by the single-chip microcomputer of COMM communication, show main control PLC fault, the power supply of main control PLC of breaking; after PLC for subsequent use obtains emergency shutdown instruction, PLC for subsequent use takes control.
E, PLC for subsequent use start emergency stopping procedures, and fan parking ensure that the Security of fan operation.
For certain producer PLC that wind-powered electricity generation is conventional, main control PLC and PLC for subsequent use are arranged on a backboard, the interface of COMM communication and controller adopts MODBUS or network interface, COMM communication is by power module control relay, the auxiliary contact of this relay seal in controller current supply circuit, under normal circumstances, the auxiliary contact of relay are adhesives, when COMM communication judges that current main control PLC breaks down, by MODBUS interface or network interface, COMM communication notifies that PLC for subsequent use exports emergency shutdown instruction, these auxiliary contact disconnect simultaneously, main control PLC power-off, control is obtained by PLC for subsequent use, PLC for subsequent use enters emergency shutdown action.After shutdown, even if wind regime condition meets, blower fan still can not be restarted, and after waiting until fault solution, is again implemented to control by master controller.
In addition, the present invention is applicable to land blower fan system for the method and device preventing blower fan PLC control system driving and is more suitable for offshore wind turbine system.
The above; it is only preferred embodiment of the present invention; not do any pro forma restriction to the present invention, those skilled in the art utilize the technology contents of above-mentioned announcement to make a little simple modification, equivalent variations or modification, all drop in protection scope of the present invention.
Claims (6)
1., for preventing a method for blower fan PLC control system driving, it is characterized in that comprising the following steps:
A, in blower fan PLC control system, set up PLC for subsequent use, between the main control PLC of described blower fan PLC control system and PLC for subsequent use, be connected with COMM communication;
B, main control PLC normal work period, send a heartbeat signal at regular intervals, described heartbeat signal sends to theft-resistant link chain and COMM communication simultaneously, PLC for subsequent use not output order;
C, the heartbeat signal number received in the described COMM communication unit of account time, judge whether main control PLC breaks down, whether theft-resistant link chain starts;
D, when judging main control PLC operation troubles, and when theft-resistant link chain does not start, described COMM communication starts PLC for subsequent use, and makes main control PLC power-off;
E, PLC for subsequent use start emergency stopping procedures, fan parking.
2. according to claim 1 for preventing the method for blower fan PLC control system driving, it is characterized in that, judgement described in described step C, that the heartbeat signal number N of heartbeat signal number M main control PLC in the unit time sent when normally working with main control PLC compares, as M < N, then be judged as main control PLC fault, enter step D.
3. a method according to claim 1 and 2 is for preventing the device of blower fan PLC control system driving, it is characterized in that comprising COMM communication, and by the PLC for subsequent use that this COMM communication is connected with main control PLC, described COMM communication comprises single-chip microcomputer, theft-resistant link chain actuating signal input interface, main control PLC heartbeat signal input interface, PLC actuating signal output interface for subsequent use and power module control interface.
4. according to claim 3 for preventing the device of blower fan PLC control system driving, characterized by further comprising and control the main control PLC relay of powering, and be controlled by COMM communication and control the power module of this relay.
5. according to claim 3 for preventing the device of blower fan PLC control system driving, it is characterized in that described PLC for subsequent use and main control PLC are arranged on same backboard, and be connected on same bus.
6. according to claim 3 for preventing the device of blower fan PLC control system driving, it is characterized in that described single-chip microcomputer is also connected with reset circuit and crystal oscillator.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210342945.2A CN102817778B (en) | 2012-09-14 | 2012-09-14 | Method and device for preventing PLC (programmable logic controller) control system of fan from crashing |
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| CN201210342945.2A CN102817778B (en) | 2012-09-14 | 2012-09-14 | Method and device for preventing PLC (programmable logic controller) control system of fan from crashing |
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| CN102817778B true CN102817778B (en) | 2015-02-04 |
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| CN108150349B (en) * | 2016-12-06 | 2020-03-24 | 北京金风科创风电设备有限公司 | Control method, device, client and system for test state of wind generating set |
| CN108257700A (en) * | 2016-12-29 | 2018-07-06 | 中核核电运行管理有限公司 | A kind of Control Room of Nuclear Power Plant moves back anti-method |
| CN110213136B (en) * | 2019-06-24 | 2022-03-04 | 山信软件股份有限公司 | Communication control method and system |
| CN112145372B (en) * | 2020-09-09 | 2024-05-14 | 上海电气风电集团股份有限公司 | Safety chain testing method, control device and wind driven generator thereof |
| CN114111992A (en) * | 2021-12-13 | 2022-03-01 | 重庆钢铁集团电子有限责任公司 | Automatic parking metering control system and method of electronic static rail weighbridge |
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| CN202789325U (en) * | 2012-09-14 | 2013-03-13 | 国电联合动力技术有限公司 | Device for preventing PLC (Programmable Logic Controller) control system of wind power generator from galloping |
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| EP1531376B1 (en) * | 2003-11-14 | 2007-01-17 | Gamesa Eolica, S.A. (Sociedad Unipersonal) | Monitoring and data processing equipment for wind turbines and predictive maintenance system for wind power stations |
| CN101311527B (en) * | 2007-05-23 | 2012-10-03 | 连云港杰瑞电子有限公司 | Pitch control system of wind mill generator |
| CN101571104B (en) * | 2009-03-12 | 2011-05-18 | 苏州能健电气有限公司 | Safety chain control system |
| CN201372895Y (en) * | 2009-03-12 | 2009-12-30 | 苏州能健电气有限公司 | Safety chain control system |
| CN201383095Y (en) * | 2009-04-13 | 2010-01-13 | 西安江河电站技术开发有限责任公司 | PLC redundancy rotation-speed monitoring device |
| CN101776042A (en) * | 2010-01-07 | 2010-07-14 | 南京科远自动化集团股份有限公司 | Stand-by safety chain monitoring and protecting device for wind power generation control system |
| CN102011695A (en) * | 2010-12-10 | 2011-04-13 | 苏州能健电气有限公司 | Wind turbine pitch system |
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| CN202789325U (en) * | 2012-09-14 | 2013-03-13 | 国电联合动力技术有限公司 | Device for preventing PLC (Programmable Logic Controller) control system of wind power generator from galloping |
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Owner name: STATE GRID CORPORATION OF CHINA STATE GRID XINYUAN Effective date: 20141208 |
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Effective date of registration: 20141208 Address after: 100000 Beijing West Fourth Ring Road, No. 16, building 8, floor 1, Haidian District Applicant after: Guodian United Power Technology Co., Ltd. Applicant after: State Grid Corporation of China Applicant after: State Grid Xinyuan Zhangjiakou Scenery Storage Demonstration Power Plant Co., Ltd. Address before: 100000 Beijing City, Zhongguancun, South Street, building B, building No., level 56, level 16 Applicant before: Guodian United Power Technology Co., Ltd. |
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