CN102817778A - 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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- CN102817778A CN102817778A CN2012103429452A CN201210342945A CN102817778A CN 102817778 A CN102817778 A CN 102817778A CN 2012103429452 A CN2012103429452 A CN 2012103429452A CN 201210342945 A CN201210342945 A CN 201210342945A CN 102817778 A CN102817778 A CN 102817778A
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000004891 communication Methods 0.000 claims description 35
- 239000013078 crystal Substances 0.000 claims description 3
- 230000007257 malfunction Effects 0.000 abstract 3
- 238000005516 engineering process Methods 0.000 description 4
- 230000007812 deficiency Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012827 research and development 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
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 relate to a kind of method and device that is used to prevent blower fan PLC control system driving.
Background technique
The blower fan master control system is a most important parts in the blower fan control system; Master control system comprises PLC, theft-resistant link chain, variable blade control system and Frequency Converter Control system, and when PLC control system " driving ", promptly PLC crashes or the PLC execution speed is crossed and can directly be started theft-resistant link chain when slow; If this moment, theft-resistant link chain itself went wrong; Frequency variator can't obtain the theft-resistant link chain emergency-stop signal with the change oarage, can't shut down, and this has caused great potential safety hazard to the whole wind force generating system.
This shows; Existing technology exists tangible deficiency and defective; Therefore how to found the theft-resistant link chain fault Puiescent, inoperative potential safety hazard that a kind of solution possibly cause because of the main control PLC control system when main control PLC breaks down; Prevent the method and the device that are used to prevent blower fan PLC control system driving of PLC control system " driving ", one of real important topic that belongs to current research and development.
Summary of the invention
The technical problem that the present invention will solve provides a kind of method and device that is used to prevent blower fan PLC control system driving; Make it when wind-powered electricity generation machine main control PLC fault and theft-resistant link chain break down; Cut off the main control PLC power supply, subsequent use PLC realizes bus control right, realizes emergency shutdown; Avoid blower fan " driving ", thereby overcome the deficiency of existing technology.
For solving the problems of the technologies described above, a kind of method that is used to prevent blower fan PLC control system driving of the present invention may further comprise the steps: A, in blower fan PLC control system, set up subsequent use PLC; B, main control PLC normal work period are sent a heartbeat signal at regular intervals, and subsequent use PLC is output order not; C, judge the runnability of main control PLC and theft-resistant link chain through heartbeat signal; D, when judging the main control PLC operation troubles, and theft-resistant link chain subsequent use PLC, and makes the main control PLC outage when not starting; E, subsequent use PLC start the emergency shutdown program, and blower fan is shut down.
As further improvement of the present invention; Judgement described in the said step C, the heartbeat signal number N when being heartbeat signal number M that main control PLC in the unit time is sent and main control PLC proper functioning relatively, when M＜N; Then be judged as the main control PLC fault, get into step D.
Be connected with COMM communication between described main control PLC and the subsequent use PLC; Heartbeat signal described in the step B sends to theft-resistant link chain and this COMM communication simultaneously, the heartbeat signal number that receives in this COMM communication unit of account time, judge whether main control PLC breaks down, whether theft-resistant link chain starts and the outage of instruction main control PLC, subsequent use PLC startup when the main control PLC fault.
In addition, the present invention also provides a kind of device that is used to prevent blower fan PLC control system driving, comprises COMM communication, and passes through the subsequent use PLC that this COMM communication is connected with main control PLC.
As further improvement of the present invention, also comprise the relay of control main control PLC power supply, and be controlled by COMM communication and control the power module of this relay.
Described subsequent use PLC and main control PLC are installed on the same backboard, and are connected on the same bus.
Described COMM communication comprises single-chip microcomputer, theft-resistant link chain actuating signal input interface, main control PLC heartbeat signal input interface, subsequent use PLC actuating signal output interface and power module control interface.
Described single-chip microcomputer also is 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 break down, Beck-up Control System cuts off current controller power source after the instruction that obtains COMM communication, and realizes bus control right by Beck-up Control System, realizes the blower fan emergency shutdown;
2, after realizing emergency shutdown with spare controller, satisfy even play the machine condition, controller can not get into the machine state once more, waits until fault and solves, and after particularly the theft-resistant link chain fault solves and confirms, behind the replacing master controller, could get into the machine state once more.
Through accompanying drawing and embodiment, technological scheme of the present invention is done further detailed description below.
Description of drawings
Above-mentioned only is the general introduction of technological scheme of the present invention, understands the present invention in order can more to know, below in conjunction with accompanying drawing and embodiment the present invention is done further detailed description.
Fig. 1 is that the present invention prevents that the system of blower fan PLC control system driving from forming schematic representation.
Fig. 2 is that the circuit of COMM communication of the present invention connects block diagram.
Fig. 3 is that the circuit of power module of the present invention connects schematic representation.
Fig. 4 is the method flow schematic representation that the present invention is used to prevent blower fan PLC control system driving.
Fig. 5 is the workflow diagram of the subsequent use PLC of the present invention.
Embodiment
See also shown in Figure 1ly, the present invention is used to prevent the device of blower fan PLC control system driving, comprises COMM communication, and the subsequent use PLC that is connected with main control PLC through this COMM communication.
Wherein, please cooperate and consult shown in Figure 2ly, COMM communication of the present invention comprises that single-chip microcomputer and peripheral circuit thereof form the number that is used to carry out the shutoff of main control PLC power supply and calculates the 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, subsequent use PLC actuating signal output interface 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 converting the 24V direct current of outside to 5V direct current that single-chip microcomputer is suitable for, or converts single-chip microcomputer 5V direct current into 24V dc powered corresponding relay.
Subsequent use PLC can be installed on the same backboard with main control PLC, and is connected on the same bus, also can on this bus, connect several IO fasteners (comprising communication module).In addition, also be connected with the power module that is controlled by COMM communication between subsequent use PLC and the main control PLC.
See also shown in Figure 3ly, the break contact of the relay of power module control is serially connected in the power supply circuits of main control PLC, and after single-chip microcomputer sent cut-offing instruction, single-chip microcomputer IO output transferred 24V to through optocoupler, relay power, and break contact breaks off, the main control PLC outage.
Please cooperate and consult Fig. 4, shown in Figure 5, the present invention is used to prevent the method for blower fan PLC control system driving, may further comprise the steps:
A, in blower fan PLC control system, set up subsequent use PLC, be connected with COMM communication and power module between subsequent use PLC and the main control PLC.After the energising, two PLC are real time execution, and subsequent use PLC does not export any instruction.
B, main control PLC normal work period are sent 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, during, subsequent use PLC does not still export any instruction.
C, judge the runnability of main control PLC and theft-resistant link chain through heartbeat signal.Specifically; By the heartbeat signal number that receives in the COMM communication unit of account time; Heartbeat signal number N when heartbeat signal number M of again main control PLC in the unit time being sent and main control PLC proper functioning compares, thereby judges the runnability of main control PLC.Simultaneously, COMM communication also is connected with theft-resistant link chain,
D, judge the main control PLC operation troubles when the single-chip microcomputer of COMM communication, and theft-resistant link chain subsequent use PLC, and makes the main control PLC outage when not starting.Specifically, when COMM communication calculates M＜N, then be judged as the main control PLC fault; If this moment, COMM communication was not received the actuating signal of theft-resistant link chain; Then give signal of subsequent use PLC, show the main control PLC fault, the power supply of the main control PLC of breaking by the single-chip microcomputer of COMM communication; After subsequent use PLC obtained the emergency shutdown instruction, subsequent use PLC took control.
E, subsequent use PLC start the emergency shutdown program, and blower fan is shut down, and has guaranteed the Security of fan operation.
Certain producer PLC commonly used with wind-powered electricity generation is example, and main control PLC and subsequent use PLC are installed on the backboard, and the interface of COMM communication and controller adopts MODBUS or network interface; COMM communication is through the power module control relay, and the auxiliary contact of this relay seal in the controller current supply circuit, under normal circumstances; The auxiliary contact of relay are adhesives, and when COMM communication was judged current main control PLC and broken down, COMM communication was notified the instruction of subsequent use PLC output emergency shutdown through MODBUS interface or network interface; These auxiliary contact break off simultaneously; The main control PLC outage obtains control by subsequent use PLC, and subsequent use PLC gets into emergency shutdown action.After the shutdown, even the wind regime condition satisfies, blower fan still can not restarted, and waits until after fault solves, and implements control again by master controller.
In addition, the present invention is used to prevent that the method for blower fan PLC control system driving and device are applicable to that land blower fan system more is applicable to the offshore wind turbine system.
The above; It only is preferred embodiment of the present invention; Be not that the present invention is done any pro forma restriction, 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 (8)
1. method that is used to prevent blower fan PLC control system driving is characterized in that may further comprise the steps:
A, in blower fan PLC control system, set up subsequent use PLC;
B, main control PLC normal work period are sent a heartbeat signal at regular intervals, and subsequent use PLC is output order not;
C, judge the runnability of main control PLC and theft-resistant link chain through heartbeat signal;
D, when judging the main control PLC operation troubles, and theft-resistant link chain subsequent use PLC, and makes the main control PLC outage when not starting;
E, subsequent use PLC start the emergency shutdown program, and blower fan is shut down.
2. the method that is used to prevent blower fan PLC control system driving according to claim 1; It is characterized in that; Judgement described in the said step C, the heartbeat signal number N when being heartbeat signal number M that main control PLC in the unit time is sent and main control PLC proper functioning relatively, when M＜N; Then be judged as the main control PLC fault, get into step D.
3. the method that is used to prevent blower fan PLC control system driving according to claim 1 and 2; It is characterized in that; Be connected with COMM communication between described main control PLC and the subsequent use PLC; Heartbeat signal described in the step B sends to theft-resistant link chain and this COMM communication simultaneously, the heartbeat signal number that receives in this COMM communication unit of account time, judge whether main control PLC breaks down, whether theft-resistant link chain starts and the outage of instruction main control PLC, subsequent use PLC startup when the main control PLC fault.
4. a device that is used to prevent blower fan PLC control system driving is characterized in that comprising COMM communication, and passes through the subsequent use PLC that this COMM communication is connected with main control PLC.
5. the device that is used to prevent blower fan PLC control system driving according to claim 4 is characterized in that also comprising the relay of control main control PLC power supply, and is controlled by COMM communication and controls the power module of this relay.
6. the device that is used to prevent blower fan PLC control system driving according to claim 4 is characterized in that described subsequent use PLC and main control PLC are installed on the same backboard, and is connected on the same bus.
7. the device that is used to prevent blower fan PLC control system driving according to claim 4 is characterized in that described COMM communication comprises single-chip microcomputer, theft-resistant link chain actuating signal input interface, main control PLC heartbeat signal input interface, subsequent use PLC actuating signal output interface and power module control interface.
8. the device that is used to prevent blower fan PLC control system driving according to claim 7 is characterized in that described single-chip microcomputer also is connected with reset circuit and crystal oscillator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| CN102817778A true CN102817778A (en) | 2012-12-12 |
| CN102817778B CN102817778B (en) | 2015-02-04 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108150349A (en) * | 2016-12-06 | 2018-06-12 | 北京金风科创风电设备有限公司 | Control method, device, client and the system of wind power generating set test mode |
| 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 |
| CN110213136A (en) * | 2019-06-24 | 2019-09-06 | 山信软件股份有限公司 | A kind of communicating control method and system |
| CN112145372A (en) * | 2020-09-09 | 2020-12-29 | 上海电气风电集团股份有限公司 | Test method and control device of safety chain 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 |
| 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 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108150349A (en) * | 2016-12-06 | 2018-06-12 | 北京金风科创风电设备有限公司 | Control method, device, client and the system of wind power generating set test mode |
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| CN110213136A (en) * | 2019-06-24 | 2019-09-06 | 山信软件股份有限公司 | A kind of communicating control method and system |
| CN112145372A (en) * | 2020-09-09 | 2020-12-29 | 上海电气风电集团股份有限公司 | Test method and control device of safety chain and wind driven generator thereof |
| 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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| CN102817778B (en) | 2015-02-04 |
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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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