CN105257472A - Safety control method for direct-drive fan direct-current pitch varying system - Google Patents
Safety control method for direct-drive fan direct-current pitch varying system Download PDFInfo
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- CN105257472A CN105257472A CN201510748104.5A CN201510748104A CN105257472A CN 105257472 A CN105257472 A CN 105257472A CN 201510748104 A CN201510748104 A CN 201510748104A CN 105257472 A CN105257472 A CN 105257472A
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- safety system
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- safety
- direct current
- oars
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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 relates to a safety control method for a direct-drive fan direct-current pitch varying system. A first safety system and a second safety system are included; according to the first safety system, a direct-current servo driver is used for driving a direct-current servo motor to carry out pitch varying on a blade to a shutdown position; and according to the second safety system, a back-up source is used for directly driving the direct-current servo motor to carry out pitch varying on the blade to the shutdown position. The method is characterized in that when the second safety system breaks down or runs in an overtime manner, the second safety system is switched back to the first safety system. When the second safety system fails, a safety relay can be controlled for switching, the pitch varying system is switched back to the first safety system, it is guaranteed that a paddle is normally recycled by a wind turbine generator, and therefore the dependence of the direct-current pitch varying system on the back-up source is lowered, and the safety and reliability of the wind turbine generator are increased.
Description
Technical field
The present invention relates to wind-driven generator field, particularly relate to a kind of straight drive blower direct current variable propeller system method of controlling security.
Background technique
Along with maintaining sustained and rapid growth of wind-power electricity generation in world wide, one of safe operation conditionality factor becoming Wind Power Development of blower fan.No matter be direct-driving type wind power generation unit or double feed wind power generator group, no matter be direct current variable propeller system or interchange pitch-controlled system, all there is potential safety hazard, especially under strong wind state, if blade cannot be regained, majority can cause driving, thus occurs the serious accidents such as leaf destruction, machine.
At present; straight drive blower direct current variable propeller system method of controlling security; it comprises first safety system and second safety system; first safety system is that use direct current servo driver drives DC servo motor by vane propeller-changing to resting position, and second safety system uses back-up power Direct driver DC servo motor by vane propeller-changing to resting position.In these two safety systems, the parts shared are DC servo motors.When generic failure appears in blower fan, start first safety system and put away the oars; When emergency appears in blower fan, blower fan enters the state of emergency, directly starts second safety system and puts away the oars; When first safety system failure, blower fan enters the state of emergency, starts second safety system and puts away the oars.This kind of Security policy depends on back-up power, if back-up power fault, very likely occurs driving event, and back-up power is originally as easily damaged parts, and this just considerably increases potential safety hazard.
Summary of the invention
The object of the invention is to overcome above defect, a kind of safe and reliable straight drive blower direct current variable propeller system method of controlling security is provided.
For realizing above object; technological scheme of the present invention is; a kind of straight drive blower direct current variable propeller system method of controlling security; it comprises first safety system and second safety system; first safety system is that use direct current servo driver drives DC servo motor by vane propeller-changing to resting position; second safety system uses back-up power Direct driver DC servo motor by vane propeller-changing to resting position; when second safety system failure or when running time-out; switch back first safety system, it comprises the following steps:
Step 1: when first safety system breaks down or blower fan occurs emergency, blower fan enters the state of emergency;
Step 2: start second safety system, detects second safety system when exceeding the set time of operation, then enters step 3; Otherwise, continue use second safety system and put away the oars;
Step 3: judge that three change oars that three blades are corresponding drive and whether can normally run, if yes then enter step 7, otherwise enter step 4;
Step 4: change oar is driven and resets, then enter step 5;
Step 5: three change oars are driven and detects, whether all resetted and fault-free, then entered step 7, otherwise enter step 6;
Step 6: drive three change oars and reset respectively, then drives change oar and detects, if there is fault, enter step 1, otherwise return step 4;
Step 7: switch to first safety system, put away the oars with direct current servo driver, then enter step 8;
Step 8: respectively three leaf positions are detected, whether blade has been recovered to aircraft gate or whether become oar run exceed set time, if so, then enter step 1, otherwise circulation perform step 8.
Preferably, if circulation execution step 1 or step 4 are more than 5 times in program, then program stopped runs.
Advantageous Effects of the present invention is: when second safety system lost efficacy, can switch by controlling safety relay, pitch-controlled system is switched back first safety system, ensure that Wind turbines normally regains blade, thus reduce the dependence of direct current variable propeller system to back-up power, add the safety reliability of Wind turbines.
Accompanying drawing explanation
Fig. 1 is the embodiment of the present invention two safety system diverter circuit schematic diagrams;
Fig. 2 is embodiment of the present invention flow chart.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
With reference to accompanying drawing; a kind of straight drive blower direct current variable propeller system method of controlling security; it comprises first safety system and second safety system; the control switching circuit of described two safety systems is composed in series by the 24V control signal of wheel hub PLC, the normally opened contact of house dog relay, the normally opened contact of overspeed relay; wherein the 24V control signal of wheel hub PLC is provided by primary control program; WDT is used for preventing PLC from crashing and normally cannot become oar, and overspeed signal is used for protection hub rotation speed can not be too high and cause driving.First safety system is that use direct current servo driver 1 drives DC servo motor 4 that blade 5 is become oar to resting position, second safety system uses back-up power 2 Direct driver DC servo motor 4 that blade 5 is become oar to resting position, two safety systems are switched by safety relay 3, safety relay 3 is by the 24V power supply signal of wheel hub PLC6, the overspeed signal of overspeed relay 8, the SC sigmal control of house dog relay 7, control circuit provides 24V power supply signal by wheel hub PLC6, by overspeed relay 8, house dog relay 7 provides normally opened contact, safety relay 3 provides control coil to be composed in series, when Wind turbines normally opens machine, overspeed relay 8, the normally opened contact of house dog relay 7 obtains electric closed, control circuit must conduct, safety relay 3 control coil obtains electric, safety relay 3 adhesive, be now that first safety system carries out change oar, when emergency appears in Wind turbines, the 24V power supply signal that wheel hub PLC6 exports is 0V, when hub rotation speed is greater than the protection value of overspeed relay 8 settings, overspeed relay 8 normally opened contact dead electricity disconnects, when wheel hub PLC6 occurs abnormal, WDT is lost, then the normally opened contact dead electricity of house dog relay 7 disconnects, in control circuit loop, any element disconnects, safety relay 3 control coil dead electricity can be caused, thus safety relay 3 action, safety system is switched to second from first.
One of the present invention straight drive blower direct current variable propeller system method of controlling security, when second safety system failure or when running time-out, switch back first safety system, it comprises the following steps:
Step 1: when first safety system breaks down or blower fan occurs emergency, blower fan enters the state of emergency;
Step 2: start second safety system, detects second safety system when exceeding the set time 20s of operation, then enters step 3; Otherwise, continue use second safety system and put away the oars;
Step 3: judge that three change oars that three blades are corresponding drive and whether can normally run, if yes then enter step 7, otherwise enter step 4;
Step 4: change oar is driven and resets, then enter step 5;
Step 5: three change oars are driven and detects, whether all resetted and fault-free, then entered step 7, otherwise enter step 6;
Step 6: drive three change oars and reset respectively, then drives change oar and detects, if there is fault, enter step 1, otherwise return step 4;
Step 7: switch to first safety system, put away the oars with direct current servo driver, then enter step 8;
Step 8: respectively three leaf positions are detected; whether blade is recovered to aircraft gate or whether has become oar operation and exceed set time 50s; if; then enter step 1; otherwise circulation performs step 8; if circulation execution step 1 or step 4 are more than 5 times in program, then program stopped runs.
Claims (3)
1. a straight drive blower direct current variable propeller system method of controlling security; it comprises first safety system and second safety system; first safety system is that use direct current servo driver drives DC servo motor by vane propeller-changing to resting position; second safety system uses back-up power Direct driver DC servo motor by vane propeller-changing to resting position; it is characterized in that; when second safety system failure or when running time-out; switch back first safety system, it comprises the following steps:
Step 1: when first safety system breaks down or blower fan occurs emergency, blower fan enters the state of emergency;
Step 2: start second safety system, detects second safety system when exceeding the set time of operation, then enters step 3; Otherwise, continue use second safety system and put away the oars;
Step 3: judge that three change oars that three blades are corresponding drive and whether can normally run, if yes then enter step 7, otherwise enter step 4;
Step 4: change oar is driven and resets, then enter step 5;
Step 5: three change oars are driven and detects, whether all resetted and fault-free, then entered step 7, otherwise enter step 6;
Step 6: drive three change oars and reset respectively, then drives change oar and detects, if there is fault, enter step 1, otherwise return step 4;
Step 7: switch to first safety system, put away the oars with direct current servo driver, then enter step 8;
Step 8: respectively three leaf positions are detected, whether blade has been recovered to aircraft gate or whether become oar run exceed set time, if so, then enter step 1, otherwise circulation perform step 8.
2. one according to claim 1 straight drive blower direct current variable propeller system method of controlling security, is characterized in that, if when the circulation described step 1 of execution or step 4 exceed set point number, then program stopped runs.
3. one according to claim 2 straight drive blower direct current variable propeller system method of controlling security, is characterized in that, described set point number is 5 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510748104.5A CN105257472A (en) | 2015-11-06 | 2015-11-06 | Safety control method for direct-drive fan direct-current pitch varying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510748104.5A CN105257472A (en) | 2015-11-06 | 2015-11-06 | Safety control method for direct-drive fan direct-current pitch varying system |
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| CN105257472A true CN105257472A (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510748104.5A Pending CN105257472A (en) | 2015-11-06 | 2015-11-06 | Safety control method for direct-drive fan direct-current pitch varying system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757312A (en) * | 2018-06-06 | 2018-11-06 | 湘电风能有限公司 | A kind of wind-driven generator pitching control method |
| CN109707563A (en) * | 2018-12-26 | 2019-05-03 | 北京金风科创风电设备有限公司 | Variable pitch driver restart control method and device and wind generating set |
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| CN201167246Y (en) * | 2008-02-03 | 2008-12-17 | 北京能高自动化技术有限公司 | Backup power apparatus for variable pitch system |
| CN102148530A (en) * | 2011-03-02 | 2011-08-10 | 新疆金风科技股份有限公司 | Pitch control device for wind generating set and wind generating set |
| CN202091116U (en) * | 2011-05-10 | 2011-12-28 | 黑龙江瑞好科技集团有限公司 | Feathering control device of wind-driven generator |
| CN102312774A (en) * | 2010-06-29 | 2012-01-11 | 上海派恩科技有限公司 | Pitch-withdrawing control system |
| CN102705159A (en) * | 2012-05-25 | 2012-10-03 | 北京三一自动化技术有限责任公司 | Method and device for safely controlling blade withdrawing |
| CN103452755A (en) * | 2013-01-17 | 2013-12-18 | 成都阜特科技股份有限公司 | Blade-folding control method of direct-current variable-pitch control system of wind generating set |
| CN104061120A (en) * | 2014-06-20 | 2014-09-24 | 北京普华亿能风电技术有限公司 | Electric feathering control method and system |
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2015
- 2015-11-06 CN CN201510748104.5A patent/CN105257472A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201167246Y (en) * | 2008-02-03 | 2008-12-17 | 北京能高自动化技术有限公司 | Backup power apparatus for variable pitch system |
| CN102312774A (en) * | 2010-06-29 | 2012-01-11 | 上海派恩科技有限公司 | Pitch-withdrawing control system |
| CN102148530A (en) * | 2011-03-02 | 2011-08-10 | 新疆金风科技股份有限公司 | Pitch control device for wind generating set and wind generating set |
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| CN102705159A (en) * | 2012-05-25 | 2012-10-03 | 北京三一自动化技术有限责任公司 | Method and device for safely controlling blade withdrawing |
| CN103452755A (en) * | 2013-01-17 | 2013-12-18 | 成都阜特科技股份有限公司 | Blade-folding control method of direct-current variable-pitch control system of wind generating set |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757312A (en) * | 2018-06-06 | 2018-11-06 | 湘电风能有限公司 | A kind of wind-driven generator pitching control method |
| CN109707563A (en) * | 2018-12-26 | 2019-05-03 | 北京金风科创风电设备有限公司 | Variable pitch driver restart control method and device and wind generating set |
| CN109707563B (en) * | 2018-12-26 | 2021-06-11 | 北京金风科创风电设备有限公司 | Variable pitch driver restart control method and device and wind generating set |
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Application publication date: 20160120 |