CN104747370A - Variable pitch system with motor overspeed protection and EFC limit protection functions - Google Patents
Variable pitch system with motor overspeed protection and EFC limit protection functions Download PDFInfo
- Publication number
- CN104747370A CN104747370A CN201510046497.5A CN201510046497A CN104747370A CN 104747370 A CN104747370 A CN 104747370A CN 201510046497 A CN201510046497 A CN 201510046497A CN 104747370 A CN104747370 A CN 104747370A
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- Prior art keywords
- relay
- normally opened
- opened contact
- pitch
- controlled system
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- 238000001514 detection method Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 abstract 3
- 238000000034 method Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 210000003746 feather Anatomy 0.000 description 1
- 238000012812 general test Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/10—Purpose of the control system
- F05B2270/101—Purpose of the control system to control rotational speed (n)
- F05B2270/1011—Purpose of the control system to control rotational speed (n) to prevent overspeed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/328—Blade pitch angle
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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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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Burglar Alarm Systems (AREA)
Abstract
The invention discloses a variable pitch system with motor overspeed protection and EFC limit protection functions. A coil of a rotating speed monitoring relay K2 is arranged in an independent active circuit and connected to a slip ring of the variable pitch system. A safety relay K3 is arranged on a safety chain. A normally open contact K31 of the safety relay K3 and a normally open contact K21 of the rotating speed monitoring relay K2 are connected to a main circuit of an EFC loop in series. A coil of a watchdog relay K1 is connected with a normally open contact of a power module of a motor in the variable pitch system and a normally open contact of a driving module in series and then connected with the coil of the rotating speed monitoring relay K2 in parallel. The watchdog relay comprises normally open contacts K11, K12 and K13, the normally open contact K11 is connected in the safety chain in series, the normally open contact K13 is connected with the coil in parallel, and the normally open contact K12 is connected with the normally open contact K31 and the normally open contact K21 in series. The variable pitch system is higher in reliability.
Description
Technical field
The present invention relates to pitch-controlled system control technique field, in particular to a kind of pitch-controlled system with Motor Over Speed protection and EFC limit protection function.
Background technique
In the prior art, pitch-controlled system is without the interface receiving slip ring side proximity switch pulse signal, and overspeed detection realizes in master control system, and provides pitch-controlled system order by CAN communication, and trigger software becomes oar EFC program, makes it to move to feather position.
Whole safety chain system is connected by pitch-controlled system inside, and the theft-resistant link chain of any one motor axle box disconnects, and will trigger the whole theft-resistant link chain of pitch-controlled system, the two-way theft-resistant link chain hard-wired signals of output is directly connected with master control system theft-resistant link chain.The emergency feathering function (EFC) of pitch-controlled system is divided into software EFC and hardware EFC.Software EFC orders, and need to send order respectively to three axles and 3 axles just can be made all to enter feathering program, this mode is used for software fault detection, general test experiments, or the single shaft independence feathering function in certification test.EFC hardwire loop is in parallel respectively between axle box, and its security module being input as master control system exports, and high level is effective.Based on the design concept of independent pitch, each axle independent judgment of EFC hardwire loop, the EFC hardwire of any one axle breaks down, and does not all affect other axles to the reception of this signal and judgement.The theft-resistant link chain of pitch-controlled system triggers, and by trigger software EFC order, the EFC hard-wired signals making master control be given to pitch-controlled system becomes low level, thus triggering pitch-controlled system completes emergency feathering.
In existing scheme, there is following defect in pitch-controlled system, and one master control system and pitch-controlled system communication need time delays, and pitch-controlled system action exists hysteresis quality; Its two master control systems program once there is bug, software emergency feathering command expiration in master control, pitch-controlled system side protection disappearance, Wind turbines hypervelocity by uncontrollable; It is three in practical engineering project, if outside EFC hardwire is unexpected of high level short circuit, even if pitch-controlled system fault, theft-resistant link chain disconnects, and pitch-controlled system still cannot emergency feathering, and the safety for unit has buried hidden danger.
Summary of the invention
Technical problem to be solved by this invention is, provides the pitch-controlled system that a kind of reliability is higher.
Therefore, technological scheme of the present invention is as follows:
There is a pitch-controlled system for Motor Over Speed protection and EFC limit protection function, comprise theft-resistant link chain, monitor speed relay K 2 and house dog relay K 1, wherein:
The coil of described monitor speed relay K 2 is arranged on one and is independently connected to the slip ring of described pitch-controlled system in quitve circuit, for by accepting the rotating speed of pulse signal detection motor from described slip ring and closing the contact be arranged on the ECF loop of described pitch-controlled system when rotating speed exceedes predefined value;
Described theft-resistant link chain is provided with safety relay K3, the normally opened contact K31 of described safety relay K3 and the normally opened contact K21 of described monitor speed relay K 2 is connected on the main line in described ECF loop;
In the coil of described house dog relay K 1 and described pitch-controlled system the normally opened contact of power module of motor, the normally opened contact of driver module be cascaded after with the coils from parallel connection of coils of described monitor speed relay K 2, described house dog relay comprises normally opened contact K11, K12 and K13, normally opened contact K11 is connected in described theft-resistant link chain, normally opened contact K13 and described coils from parallel connection of coils, normally opened contact K12 connects with described normally opened contact K31, normally opened contact K21.
In the present invention, pitch-controlled system has measuring ability for motor lower velocity shaft hypervelocity, is worth accordingly, exceeds setting value, pitch-controlled system emergency feathering, ensure unit safety, and trouble signal is fed back master control system according to the range set of unit for hypervelocity; House dog relay K 1 meets with extreme case for pitch-controlled system safety chain system and has limit protection, can prevent due to personal factor if pitch-controlled system when becoming oar EFC loop-external input 24V power supply is broken down, theft-resistant link chain disconnects but EFC partial failure and cannot the danger of feathering, increase the reliability and security of unit, convenient; Have reaction in time, structure is simple, easy to maintenance, processing cost is low, manufacturing efficiency advantages of higher.
Further, described monitor speed relay K 2 also comprises normally opened contact K22, connects with described normally opened contact K21, adopts two contacts can prevent contact from sticking together, and improves the reliability of system.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the pitch-controlled system according to the embodiment of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.
As shown in Figure 1, there is the pitch-controlled system of Motor Over Speed protection and EFC limit protection function according to an embodiment of the invention, comprise theft-resistant link chain, monitor speed relay K 2 and house dog relay K 1, wherein:
Be connected to the slip ring of described pitch-controlled system in the coil of described monitor speed relay K 2 is arranged on one independently (independent relative to theft-resistant link chain, EFC loop) quitve circuit, close for the rotating speed by accepting pulse signal detection motor from described slip ring the contact (K21, K22) be arranged on the ECF loop of described pitch-controlled system when rotating speed exceedes predefined value;
Described theft-resistant link chain is provided with safety relay K3, the normally opened contact K31 of described safety relay K3 and the normally opened contact K21 of described monitor speed relay K 2 is connected on the main line in described ECF loop;
In the coil of described house dog relay K 1 and described pitch-controlled system the normally opened contact of power module of motor, the normally opened contact of driver module be cascaded after with the coils from parallel connection of coils of described monitor speed relay K 2, described house dog relay comprises normally opened contact K11, K12 and K13, normally opened contact K11 is connected in described theft-resistant link chain, normally opened contact K13 and described coils from parallel connection of coils, normally opened contact K12 connects with described normally opened contact K31, normally opened contact K21.
Wherein, as shown in fig. 1, M1, M2, M3 are motor, and PM1, PM2, PM3 are power module, and CM1, CM2, CM3 are driver module.
In the present invention, pitch-controlled system has measuring ability for motor lower velocity shaft hypervelocity, is worth accordingly, exceeds setting value, pitch-controlled system emergency feathering, ensure unit safety, and trouble signal is fed back master control system according to the range set of unit for hypervelocity; House dog relay K 1 meets with extreme case for pitch-controlled system safety chain system and has limit protection, can prevent due to personal factor if pitch-controlled system when becoming oar EFC loop-external input 24V power supply is broken down, theft-resistant link chain disconnects but EFC partial failure and cannot the danger of feathering, increase the reliability and security of unit, convenient; Have reaction in time, structure is simple, easy to maintenance, processing cost is low, manufacturing efficiency advantages of higher.
Further, described monitor speed relay K 2 also comprises normally opened contact K22, connects with described normally opened contact K21, adopts two contacts can prevent contact from sticking together, and improves the reliability of system.
The working method of the pitch-controlled system in this experiment use is specific as follows:
For 2.0MW Wind turbines, generator rated speed 1200rpm, gear-box is 90.2, and main control software generator hypervelocity value setting value is 1344rpm, and slip-ring generator hypervelocity is worth about 1410rpm, then slip ring side hypervelocity value is 1410rpm/90.2=15.6rpm.
K21 speed monitor setting value is F01:4 (hyperspin mode), NC1:30 (slip ring cam number, for display frequency), AV1:4 (count pulse number), SP1:15.6 (setting value), HY1:90.0 (return of value, represent with %), ST1:0 (start-up study), DIM:0 (0=rpm, 1=Hz)
In pitch-controlled system normal course of operation, whole safety chain system is connected by pitch-controlled system inside, and any one important node disconnects, and will trigger the whole theft-resistant link chain of pitch-controlled system.Hardware EFC loop high level is effective, and any inefficacy in two loops, will trigger EFC, feathering is to home.Now the relay normally open contact WD6 of the relay normally open contact WD5 of the relay normally open contact WD4 of the relay normally open contact WD3 of the relay normally open contact WD2 of the relay normally open contact WD1 of power module PM1, driver module CM1, power module PM2, driver module CM2, power module PM3, driver module CM3 is all closed, the coil of house dog relay K 1 obtains electric and self-locking (normally opened contact K13 closes), normally opened contact K11 closes, and forms series loop with theft-resistant link chain; Equally, normally opened contact K12 closes.
There is provided uninterruptable power source 24V to be similarly speed monitor K2 to power, speed monitor obtains electric, calculate slip ring according to input pulse number and survey generator speed, the actual tachometer value detected compares with setting value SP1, if checkout value is not lower than setting value (generator exceeds the speed limit), then K2 normally opened contact K21, K22 are closed, pitch-controlled system EFC loop high level signal input power module PM1, PM2, PM3, driver module CM1, CM2, CM3, system is normally run.
When there is hypervelocity in generator, namely speed monitor K2 detects that rotating speed is greater than 15.6rpm, then normally opened contact K21, K22 opens simultaneously and (adopts the mode of two normally opened contact series connection, prevent contact adhesion), EFC hardwire loop is triggered, pitch-controlled system by feathering to home 90 degree; When generator speed is reduced to 90.0% (return of value HY1) of setting value, K21 normally opened contact K21, K22 will close simultaneously, and EFC loop is normal, now allow pitch-controlled system to open machine.
When pitch-controlled system self breaks down, pitch-controlled system theft-resistant link chain disconnects, then house dog relay K 1 coil losing electricity, normally opened contact K11, K12, K13 open.If now become oar hardware EFC loop by outside 24V power supply short circuit, then EFC loop becomes low level due to the disconnection of normally opened contact K12, can not cannot disconnect EFC hardwire loop because of outside erroneous input 24V high level, ensures that unit feathering is to home.
In sum, content of the present invention is not limited in the above-described embodiment, and those skilled in the art can propose other embodiment within technological guidance's thought of the present invention, but this embodiment comprises within the scope of the present invention.
Claims (2)
1. there is a pitch-controlled system for Motor Over Speed protection and EFC limit protection function, it is characterized in that, comprise theft-resistant link chain, monitor speed relay K 2 and house dog relay K 1, wherein:
The coil of described monitor speed relay K 2 is arranged on one and is independently connected to the slip ring of described pitch-controlled system in quitve circuit, for by accepting the rotating speed of pulse signal detection motor from described slip ring and closing the contact be arranged on the ECF loop of described pitch-controlled system when rotating speed exceedes predefined value;
Described theft-resistant link chain is provided with safety relay K3, the normally opened contact K31 of described safety relay K3 and the normally opened contact K21 of described monitor speed relay K 2 is connected on the main line in described ECF loop;
In the coil of described house dog relay K 1 and described pitch-controlled system the normally opened contact of power module of motor, the normally opened contact of driver module be cascaded after with the coils from parallel connection of coils of described monitor speed relay K 2, described house dog relay comprises normally opened contact K11, K12 and K13, normally opened contact K11 is connected in described theft-resistant link chain, normally opened contact K13 and described coils from parallel connection of coils, normally opened contact K12 connects with described normally opened contact K31, normally opened contact K21.
2. the pitch-controlled system with Motor Over Speed protection and EFC limit protection function according to claim 1, it is characterized in that, described monitor speed relay K 2 also comprises normally opened contact K22, connects with described normally opened contact K21.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510046497.5A CN104747370A (en) | 2015-01-29 | 2015-01-29 | Variable pitch system with motor overspeed protection and EFC limit protection functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510046497.5A CN104747370A (en) | 2015-01-29 | 2015-01-29 | Variable pitch system with motor overspeed protection and EFC limit protection functions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104747370A true CN104747370A (en) | 2015-07-01 |
Family
ID=53587526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510046497.5A Pending CN104747370A (en) | 2015-01-29 | 2015-01-29 | Variable pitch system with motor overspeed protection and EFC limit protection functions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104747370A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958839A (en) * | 2016-06-20 | 2016-09-21 | 许继集团有限公司 | Switching power supply device and variable propeller system control cabinet |
| CN111692045A (en) * | 2020-06-15 | 2020-09-22 | 苏州利茂电气科技有限公司 | System for preventing fan from overspeed variable pitch |
Citations (4)
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| 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 |
| CN102080627A (en) * | 2011-03-03 | 2011-06-01 | 北京科诺伟业科技有限公司 | Safety chain unit for double-fed wind generating set |
| CN201953563U (en) * | 2011-02-24 | 2011-08-31 | 华锐风电科技(集团)股份有限公司 | Safety control device for high-power wind turbine |
| CN102278278A (en) * | 2011-07-20 | 2011-12-14 | 许继集团有限公司 | Safety control system and safety control method of wind generating set |
-
2015
- 2015-01-29 CN CN201510046497.5A patent/CN104747370A/en active Pending
Patent Citations (4)
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| 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 |
| CN201953563U (en) * | 2011-02-24 | 2011-08-31 | 华锐风电科技(集团)股份有限公司 | Safety control device for high-power wind turbine |
| CN102080627A (en) * | 2011-03-03 | 2011-06-01 | 北京科诺伟业科技有限公司 | Safety chain unit for double-fed wind generating set |
| CN102278278A (en) * | 2011-07-20 | 2011-12-14 | 许继集团有限公司 | Safety control system and safety control method of wind generating set |
Non-Patent Citations (1)
| Title |
|---|
| 孙大鹏: "双馈风力发电机组电控与安全保护***设计研究", 《中国优秀硕士学位论文全文数据库工程科技II》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958839A (en) * | 2016-06-20 | 2016-09-21 | 许继集团有限公司 | Switching power supply device and variable propeller system control cabinet |
| CN111692045A (en) * | 2020-06-15 | 2020-09-22 | 苏州利茂电气科技有限公司 | System for preventing fan from overspeed variable pitch |
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Application publication date: 20150701 |