CN104061120A - Electric feathering control method and system - Google Patents
Electric feathering control method and system Download PDFInfo
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- CN104061120A CN104061120A CN201410281384.9A CN201410281384A CN104061120A CN 104061120 A CN104061120 A CN 104061120A CN 201410281384 A CN201410281384 A CN 201410281384A CN 104061120 A CN104061120 A CN 104061120A
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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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Abstract
The invention provides an electric feathering control method and system. When a wind generating set needs to start an emergency shut-down procedure due to a safety chain fault, an alternating current driving power supply provided for a hub is not cut off; according to the system, a direct-current power supply is firstly used for supplying power to drive direct-current circuit feathering; if the direct-current feathering fails, an alternating current circuit is switched on, and an alternating current power supply is used for driving feathering; if the alternating current feathering fails, the direct current power supply is switched on, and the direct current power supply is used for driving feathering; therefore, feathering driving characterized in that the direct current power supply and the alternating current power supply are mutual standby is always executed until the feathering succeeds. The electric feathering control method characterized in that the direct current power supply and the alternating current power supply are mutual standby is executed, only one of a direct-current feathering circuit and an alternating current feathering circuit needs to be guaranteed to be normal to successfully finish fan emergency feathering, and the safety of the wind generating set is improved; meanwhile, the use frequencies of the direct-current feathering circuit are reduced, and therefore a battery is protected.
Description
Technical field
The invention belongs to technical field of wind power generating equipment, particularly a kind of feathering control system of electric variable propeller system.
Background technique
Theft-resistant link chain is last pipe protection of blower fan, by wheel hub anxious stop, column foot suddenly stops, suddenly stop in cabin, shock detection, main shaft hypervelocity, driftage limit switch series winding form, when these parts that are chained together have one to go wrong, whole series winding loop all can disconnect.Once blower fan theft-resistant link chain disconnects, blower fan will be reported emergency shutdown, now just realizes quick feathering by power source driving blade, utilizes the aerodynamic characteristics of blade to realize aerodynamic brake, makes draught fan impeller stall, realizes dead halt.
In order to increase the protection to blower fan, feathering system generally all will be joined reserve battery so that guarantee can dead halt in the situation of unit generation catastrophe failure or major accident.
And direct current generator is with its stepless speed regulation, low-speed performance is good, simple in structure, control accuracy is high, and response is fast, thereby is widely used in wind turbine pitch system.Especially series DC machine starting torque is large, very good for the weigh blade of tens of meters of Shuo Dun ﹑ diameters of rotation.
But the shortcoming of this mode is to rely on battery operatedly, once battery damages or other reason causes battery to discharge, just normal feathering of blower fan, has increased non-cannot the shutdown in emergency situation of blower fan and cause the risk of " driving ".
Summary of the invention
Because the defect in prior art, the invention provides blower fan is occurring after theft-resistant link chain fault, while starting emergency feathering system, while triggering theft-resistant link chain EFC signal (Emergency Feathering Control), in feathering circuit, first drive feathering with direct current supply, then drive the mode of feathering by ac power supply as standby power supply.
Theft-resistant link chain EFC signal is: the emergency feathering control signal triggering when theft-resistant link chain fault, being provided by slip ring wheel hub by cabin, is the charged normally closed loop design of 24V voltage, while there is not theft-resistant link chain fault, this circuit closed, i.e. theft-resistant link chain EFC signal output 24V high level; In the time there is theft-resistant link chain fault, this loop disconnects, and also, theft-resistant link chain EFC signal output 0V low level, now carries out feathering action.
A kind of electronic feathering controlling method, by the direct current feathering circuit of DC power supply with exchange feathering circuit by ac power supply, when detecting after theft-resistant link chain fault, trigger EFC signal, emergency feathering control relay K1 disconnects, the AC driven power providing in wheel hub is not provided simultaneously, first system utilizes DC power supply, drive DC circuit feathering, after time delay a period of time, whether successfully detect feathering, if this DC electrical source drives feathering failure, alternating circuit is connected, drive feathering by ac power supply, after time delay a period of time, whether successfully detect feathering, if this ac power supply drives also failure of feathering, again connect DC electrical source, drive feathering by DC electrical source, carry out thus by DC electrical source and ac power supply electronic feathering controlling method for subsequent use each other always, until feathering success.
The present invention compared with prior art, in original direct current feathering circuit, to increase exchanges power supply to drive the alternating circuit of feathering, this interchange feathering circuit provides power supply by wheel hub slip ring by cabin in wheel hub, when detecting after theft-resistant link chain fault, this ac power supply enters axle control cabinet through frequency variator frequency conversion output DC electrical source, with original direct current feathering circuit and link the direct current generator of feathering system, to realize the electronic feathering of blower fan.By carrying out DC electrical source and ac power supply electronic feathering controlling method for subsequent use each other; as long as guarantee direct current, to exchange feathering circuit You Yi road normal, can complete smoothly blower fan emergency feathering, improves the Security of wind-powered electricity generation unit; reduce the frequency of usage of direct current feathering circuit, protection battery simultaneously.
The present invention also provides a kind of electronic feathering control system, comprise DC electrical source, direct current feathering control switch KM5, AC driven power, frequency variator, exchange feathering control switch KM3, direct current generator and emergency feathering control relay K1, wherein, after DC electrical source and direct current feathering control switch KM5 series winding with by AC driven power with frequency variator and exchange the circuit after feathering control switch KM3 contacts and connect, then be connected to direct current generator, exchanging feathering control switch KM3 and direct current feathering control switch KM5 is interlocking design, controlled respectively the break-make that exchanges feathering control switch KM3 and direct current feathering control switch KM5 by emergency feathering control relay K1.
System also comprises main limit switch S1, spends limit switch for blade 91, and blade position reaches 91 degree, is triggered, and S1 disconnects, and needs in addition a redundancy limit switch S2, when blade position reaches 95 degree, is triggered, and S2 disconnects.Limit switch S2 can guarantee the safety brake of pitch motor when 91 degree limit switches lost efficacy at main limit switch.
In the time that limit switch S1, limit switch S2 are closed, also be that feathering is when unsuccessful, by the break-make of continuous control emergency feathering control relay K1, control being switched on or switched off of DC electrical source or AC driven power, reach according to first carrying out DC electrical source and drive feathering, carry out again the order that ac power supply drives feathering, drive feathering, until feathering success.
The present invention compared with prior art; by DC electrical source and ac power supply driving feathering controlling method for subsequent use each other; as long as guarantee direct current, exchange feathering circuit You Yi road normal; can complete smoothly blower fan emergency feathering; improve the Security of wind-powered electricity generation unit; reduce the frequency of usage of direct current feathering circuit, protection battery simultaneously.
Emergency feathering control relay K1 is 24V control relay, by two path control signal control:
(1), by theft-resistant link chain EFC SC sigmal control, while there is not theft-resistant link chain fault, EFC is high level, the conducting of emergency feathering control relay; In the time there is theft-resistant link chain fault, trigger EFC signal (0V low level), emergency feathering control relay disconnects;
(2) by exchanging emergency feathering SC sigmal control, this signal is provided by master control, by exchanging the given emergency feathering control relay of emergency feathering control switch K2 K1.When theft-resistant link chain fault occurs, and when the failure of direct current feathering, master control provides " exchanging emergency feathering signal "=1, now exchanges emergency feathering control switch K2 conducting, then emergency feathering control relay K1 conducting (being 24V high level), carries out and exchanges emergency feathering; In the time of interchange feathering also failure, master control provides " exchanging emergency feathering signal "=0, now exchanges emergency feathering control switch K2 and disconnects, and then emergency feathering control relay K1 disconnects (being 0V low level), execution direct current emergency feathering.
Preferably, can increase and drive feathering and ac power supply to drive the number of times of feathering to limit to DC electrical source, for example can counter be set in the master control system that is positioned at master control cabinet, each execution ac power supply or DC electrical source can add 1 to counter while driving feathering, when carrying out after predetermined number of times, if feathering is also unsuccessful, stop feathering action, also can increase and drive feathering and ac power supply to drive limiting cumulative time of feathering to DC electrical source, for example can increase time delay relay, while being driven the method for feathering to drive the method for feathering with execution by AC driven power by DC electrical source due to system execution, generally all carry out a set time (for example: 15 seconds), so here we can arrange when system carry out 3 direct current featherings exchange after feathering with 4 times, the cumulative time that is its execution is " (3+4) * 15 seconds=105 seconds ", for example, if the time that feathering system is carried out reaches limiting time (150 seconds), and feathering is also unsuccessful, stop feathering action.Master control cabinet gives and becomes propeller angle and speed.
Electronic feathering system, in the time judging that whether feathering is successful, needs judgement: whether feathering is to the 91 spacing positions of degree for blade.Need in addition a redundancy limit switch, spacing for 95 degree, when 91 degree limit switches lost efficacy, can guarantee the safety brake of pitch motor at main limit switch.
Preferably, in DC circuit, can provide a dc circuit breaker, for direct current main power switch, provide overcurrent protection; A circuit breaker can also be provided in alternating circuit, for ac main power switch, provide overcurrent protection.
AC driven power is 400V (L1-3, N); Ac control power supply is 230V, is provided by wheel hub slip ring 400V power supply, and ups power (6) is 230V Ac, powers through wheel hub slip ring with power source in wheel hub.
DC electrical source in system can be provided by battery pack, and 230V ac control power supply can be battery charging.
Brief description of the drawings
Below in conjunction with accompanying drawing to alternating direct-current of the present invention each other controlling method for subsequent use be specifically described.
Fig. 1 is that the present invention is by the electronic feathering system flow chart of master control system control;
Fig. 2 is circuit diagram of the present invention, by the circuit diagram of the electronic feathering system of master control system control;
Fig. 3 is circuit diagram of the present invention, by three electronic feathering system circuit diagram of time delay relay control;
Fig. 4 is circuit diagram of the present invention, by two electronic feathering system circuit diagram of time delay relay control;
Fig. 5 is that the present invention is by three electronic feathering system flow charts of time delay relay control;
Fig. 6 is that the present invention is by two electronic feathering system flow charts of time delay relay control.
Embodiment
The electronic feathering controlling method of one provided by the invention and system, being only applicable to fault type is theft-resistant link chain fault.
Theft-resistant link chain EFC signal is: the emergency feathering control signal triggering when theft-resistant link chain fault, and by the charged normally closed loop design of slip ring wheel hub 24V voltage, while there is not theft-resistant link chain fault, this circuit closed, i.e. theft-resistant link chain EFC signal output 24V high level; In the time there is theft-resistant link chain fault, this loop disconnects, and also, theft-resistant link chain EFC signal output 0V low level, now carries out feathering action.
Embodiment one: controlled the break-make of DC electrical source and ac power supply by the port output signal of master control cabinet, carry out according to this by DC electrical source and ac power supply feathering method for subsequent use each other.
As Fig. 1 system flow chart, and Fig. 2 is by shown in the circuit diagram of the electronic feathering system of master control system control:
A kind of electronic feathering controlling method, in the time of theft-resistant link chain fault, triggers EFC signal, and EFC signal becomes low level, and emergency feathering control relay K1 disconnects, and carries out following steps:
The first step, because emergency feathering control relay K1 disconnects, causes AC driven power disconnection, DC electrical source conducting, and now system execution is the method for direct current generator for electric drive feathering by described DC electrical source.
Second step, whether system detects feathering successful: after emergency feathering control relay K1 disconnects, time delay 15 seconds, whether monitoring 91 degree limit switches or 95 degree limit switches are triggered, if "Yes", feathering is successful, native system is carried out and is finished.If the failure of "no" feathering, carries out next step.
The 3rd step, when DC electrical source drives after feathering failure, carry out ac power supply feathering method: master control provides " exchanging emergency feathering signal "=1, exports 24V high level, connect and exchange emergency feathering control switch K2, then, emergency feathering control relay K1 conducting, causes DC electrical source disconnection, AC driven power to be connected, and by the given feathering angle of master control (91 degree), it is direct current generator power supply by frequency variator that system is carried out by described AC driven power, drives the method for feathering.
The 4th step, whether system detects feathering successful: when after emergency feathering control relay K1 conducting, time delay 15 seconds, whether monitoring 91 degree limit switches or 95 degree limit switches are triggered, if "Yes", feathering success, at this moment master control provides " exchanging emergency feathering signal "=0, and native system is carried out and is finished; If the failure of "no" feathering, carries out next step.
The 5th step, when ac power supply drives after feathering failure, master control provides " exchanging emergency feathering signal "=0, export 0V low level, now disconnect and exchange emergency feathering control switch K2, disconnect emergency feathering control relay K1, continue to carry out first step DC electrical source and drive feathering.
Thus, can realize by DC electrical source and ac power supply driving feathering method for subsequent use each other, in the time of feathering success, log off.
In the time carrying out electronic feathering controlling method, carry out successively direct drive feathering and be no more than 4 times with the number of times that exchanges the repetition that drives feathering.
By carrying out DC electrical source and ac power supply electronic feathering controlling method for subsequent use each other; as long as guarantee direct current, to exchange feathering circuit You Yi road normal, can complete smoothly blower fan emergency feathering, improves the Security of wind-powered electricity generation unit; reduce the frequency of usage of direct current feathering circuit, protection battery simultaneously.
If Fig. 2 is by as shown in the circuit diagram of the electronic feathering system of master control system control, the invention provides a kind of electronic feathering control system, comprise DC electrical source 3, direct current feathering control switch KM5, AC driven power 4, frequency variator 7, exchange feathering control switch KM3, direct current generator 8 and emergency feathering control relay K1, after DC electrical source 3 and direct current feathering control switch KM5 series winding with AC driven power 4 with frequency variator 7 and exchange the circuit after feathering control switch KM3 contacts and connect, then, be connected to direct current generator 8, wherein, exchanging feathering control switch KM3 and direct current feathering control switch KM5 is interlocking design,
By emergency feathering control relay, K1 controls respectively.
System also comprises main limit switch S1, spends limit switch for blade 91, and blade position reaches 91 degree, is triggered, and S1 disconnects, and needs in addition a redundancy limit switch S2, when blade position reaches 95 degree, is triggered, and S2 disconnects.Limit switch S2 can guarantee the safety brake of pitch motor when 91 degree limit switches lost efficacy at main limit switch.
System also comprises the control loop of interchange feathering control switch KM3 and the control loop of direct current feathering control switch KM5.The control loop that exchanges feathering control switch KM3 adopts ac control power supply 5 to power; The control loop of direct current feathering control switch KM5 adopts ups power 6 to power.
Exchange the control loop of feathering control switch KM3: contacted by the normally-closed contact of emergency feathering control relay K1 normally opened contact, limit switch S1, limit switch S2 and direct current feathering control switch KM5 and the coil that exchanges feathering control switch KM3.
The control loop of direct current feathering control switch KM5: by emergency feathering control relay K1 normally-closed contact, limit switch S1, limit switch S2 with exchange the normally-closed contact of feathering control switch KM3 and the coil of direct current feathering control switch KM3 is contacted.
System is also provided with master control cabinet 1, is provided with timer, counter and D01 port in this master control cabinet 1, and the output of D01 port " exchanges emergency feathering signal "; Master control system is installed in master control cabinet 1, master control system realizes the function of timer sum counter, control the value that the output of D01 port " exchanges emergency feathering signal ", and the angle of given blower variable-pitch and speed, wherein: timer is the time of implementation that AC driven power/DC electrical source drives feathering, the value of timer can be set to 12 seconds to 20 seconds, preferably 15 seconds; The number of times that drives feathering for carrying out DC electrical source, its initial value is made as 0, and maximum value can be made as 2-4, is preferably made as 3.
In the time there is not theft-resistant link chain fault, emergency feathering control relay K1 closure, direct current feathering control switch KM5 disconnect, exchange feathering control switch KM3 closure.
In the time there is theft-resistant link chain fault:
(1) first carry out DC electrical source and drive feathering action.Now, emergency feathering control relay K1 disconnects, and timer is started working, and because emergency feathering control relay K1 normally opened contact disconnects, disconnects so exchange feathering control switch KM3 control loop; Now do not trigger the normally-closed contact closure of (closure), interchange feathering control switch KM3 (disconnecting) due to emergency feathering control relay K1 normally-closed contact closure, limit switch, therefore the control loop conducting of direct current feathering control switch KM5, now drive feathering by DC electrical source 3, when reaching after the time of timer customization, if limit switch S1 or S2 are not triggered, direct current feathering failure, continues to carry out next step; If limit switch S1 or S2 are triggered, direct current feathering success, exchanges the control loop of feathering control switch KM3 and the control loop of direct current feathering control switch KM5 and all disconnects, and native system is carried out and finished.
(2) if the action of ac power supply driving feathering is carried out in the failure of direct current feathering
System judges whether the value of counter is 3, if the value of counter is 3, native system is carried out and finished, now, the D01 port of master control cabinet 1 provides " exchanging emergency feathering signal "=0, exports 0V low level, exchange emergency feathering control switch K2 and disconnect, emergency feathering control relay K1 disconnects;
Otherwise, counter+1, timer restarts work, the D01 port of master control cabinet 1 provides " exchanging emergency feathering signal "=1, and output 24V high level is connected and exchanged emergency feathering control switch K2, then, emergency feathering control relay K1 conducting, because the normally-closed contact of emergency feathering control relay K1 disconnects, so direct current emergency feathering control switch KM5 control loop disconnects; Now do not trigger the normally-closed contact closure of (closure), direct current feathering control switch KM5 (disconnecting) due to emergency feathering control relay K1 normally opened contact closure, limit switch, therefore exchange the control loop conducting of feathering control switch KM3, system is switched to the feathering circuit being driven by AC driven power 4 and continues to carry out feathering, when again reaching after the time of timer customization, if limit switch S1 or S2 are not triggered, exchange feathering failure, continue to carry out next step; If limit switch S1 or S2 are triggered, exchange feathering success, exchange the control loop of feathering control switch KM3 and the control loop of direct current feathering control switch KM5 and all disconnect, native system is carried out and is finished.
(3) if exchange also failure of feathering, again carry out DC electrical source and drive feathering action.The D01 port of master control cabinet 1 provides " exchanging emergency feathering signal "=0, exports 0V low level, now exchanges emergency feathering control switch K2 and disconnects, and system continues execution step (1).
Thus, in the time that limit switch S1, limit switch S2 are closed, also be that feathering is when unsuccessful, the continuous output signal of DO1 port of master control cabinet 1 is controlled the break-make of emergency feathering control relay K1, control being switched on or switched off of DC electrical source or AC driven power to reach, drive DC electrical source and ac power supply for subsequent use each other, carry out according to this object of feathering.
Can guarantee that so at least one road feathering circuit is normal, can complete smoothly blower fan feathering.
Preferably, also comprise and exchange 400V control switch, axle control cabinet 2 electric after, switch on power, exchange 400V power supply for frequency variator provides.
Preferably, also comprising AC circuit breaker Q1, is 400V power switch, and AC driven power 4, ac power switch Q1 and interchange 400V control switch KM4 are connected.
Preferably, also comprising dc circuit breaker Q2, is DC power supply switch, DC electrical source 3, direct current main power switch Q2 and DC electrical source feathering control switch KM5 series winding.
Wherein, 400V main power switch Q1, interchange 400V control switch KM4, frequency variator 7, interchange feathering control switch KM3, direct current main power switch Q2 and direct current feathering control switch KM5 are positioned at axle control cabinet 2.
If Fig. 2 is by as shown in the circuit diagram of the electronic feathering system of master control system control, in figure, each device is:
Q1: AC circuit breaker, 400V ac power switch, provides overcurrent protection.
Q2: dc circuit breaker, battery power switch, provides overcurrent protection.
K1:24V control relay, emergency feathering control relay, by two path control signal control:
1) be theft-resistant link chain EFC SC sigmal control, in the time there is theft-resistant link chain fault, trigger EFC signal (low level), tight
Anxious feathering control relay K1 disconnects;
2) control for exchanging emergency feathering control switch K2, when theft-resistant link chain fault occurs, and direct current feathering is when unsuccessful,
Master control provides " exchanging emergency feathering signal "=1, and output 24V high level, connects and exchange emergency feathering control
K switch 2, then emergency feathering control relay K1 conducting, system craspedodrome AC driven power drives feathering;
In the time that interchange feathering is also unsuccessful, master control provides " exchanging emergency feathering signal "=0, output 0V low level,
Disconnect and exchange emergency feathering control switch K2, then emergency feathering control relay K1 disconnects, and system is kept straight on straight
Stream power source driving feathering.
K2: control relay, exchanges emergency feathering control switch, by master control system control.The D01 port of master control cabinet 1 with exchange emergency feathering control switch K2 and be connected, exchange normally opened contact and the described safety chain signal of emergency feathering control switch K2 and connect after and the contact control loop of the described emergency feathering control relay K1 of formation of the coil of emergency feathering control relay K1.In the time of the D01 of master control cabinet 1 port output 24V high level, exchange emergency feathering control switch K2 closure, emergency feathering control relay K1 conducting then; In the time of the D01 of master control cabinet 1 port output 0V low level, exchange emergency feathering control switch K2 and disconnect, emergency feathering control relay K1 disconnects then.
KM3: contactor, exchange feathering control switch, for direct current generator provides DC electrical source, obtain electric after, connect the output of frequency variator direct current and direct current generator, enable frequency variator simultaneously, output DC electrical source, carries out ac power supply and drives and become oar action.On condition: emergency feathering control relay K1 conducting (being high level), meanwhile, direct current feathering control switch KM5 is off state, simultaneously, blade 91 is spent, 95 degree position limit switch access failures, and blade does not reach 91 degree, 95 degree positions, and S1, S2 are closed state.
KM4: contactor, the control switch of 400V ac power supply 4, axle control cabinet 2 electric after, powered by ac control power supply 5, for frequency variator provides 400V ac power supply.
KM5: contactor, direct current feathering control switch, for direct current generator provides DC electrical source, obtain electric after, DC electrical source is connected, DC electrical source drives feathering action.On condition: theft-resistant link chain EFC signal is triggered, emergency feathering control relay K1 disconnects, and exchanges feathering circuit switch KM3 disconnection, simultaneously, blade 91 is spent, 95 degree position limit switch access failures, and blade does not reach 91 degree, 95 degree positions, and S1, S2 are closed state.
S1: spend limit switch for blade 91, blade position reaches 91 degree, is triggered, and S1 disconnects.
S2: spend limit switch for blade 95, blade position reaches 95 degree, is triggered, and S2 disconnects.In the time that losing efficacy, guarantees limit switch S1 the safety brake of pitch motor.
Preferably, AC driven power 4,400V, is powered by wheel hub slip ring.
Ac control power supply 5,230V, is provided by 400V AC driven power, provides control power supply for exchanging feathering control switch KM3.
Ups power 6,230V is powered to wheel hub through wheel hub slip ring by the UPS device that is positioned at engine room control cabinet, and for direct current feathering control switch, KM5 provides control power supply.
DC electrical source 3 can be battery pack, is charged by 230V ac control power supply 5.
Embodiment two: by the break-make of time delay relay control DC electrical source and ac power supply, carry out according to this by DC electrical source and ac power supply feathering method for subsequent use each other.
If Fig. 1 system flow chart and Fig. 3 are by as shown in three electronic feathering system circuit diagram of time delay relay control:
A kind of electronic feathering controlling method, in the time of theft-resistant link chain fault, triggers EFC signal, and EFC signal becomes low level, and emergency feathering control relay K1 disconnects, and carries out following steps:
The first step, because emergency feathering control relay K1 disconnects, causes AC driven power disconnection, DC electrical source conducting, and now system execution is the method for direct current generator for electric drive feathering by described DC electrical source.
Second step, whether system detects feathering successful: after emergency feathering control relay K1 disconnects, by time delay relay control time delay 15 seconds, whether monitoring 91 degree limit switches or 95 degree limit switches are triggered, if "Yes", feathering success, native system is carried out and is finished.If the failure of "no" feathering, carries out next step.
The 3rd step, when DC electrical source drives after feathering failure, carry out ac power supply feathering method: now by time delay relay, control and exchange emergency feathering control switch K2 conducting, then, emergency feathering control relay K1 conducting, cause DC electrical source disconnection, AC driven power to be connected, and by the given feathering angle of master control (91 degree), it is direct current generator power supply by frequency variator that system is carried out by described AC driven power, drives the method for feathering.
The 4th step, whether system detects feathering successful: when after emergency feathering control relay K1 conducting, by time delay relay control time delay 15 seconds, whether monitoring 91 degree limit switches or 95 degree limit switches are triggered, if "Yes", feathering success, native system is carried out and is finished; If the failure of "no" feathering, carries out next step.
The 5th step, when ac power supply drives after feathering failure, by time delay relay, controls and exchanges emergency feathering control switch K2 disconnection, and emergency feathering control relay K1 disconnects, and continues to carry out first step DC electrical source and drives feathering.
Thus, can realize by DC electrical source and ac power supply driving feathering method for subsequent use each other, in the time of feathering success, log off.
In the time carrying out electronic feathering controlling method of the present invention, carry out successively direct drive feathering and be no more than 105 seconds with the time that exchanges the repetition that drives feathering, also carry out DC electrical source and ac power supply each other when driving feathering method for subsequent use, DC electrical source drives feathering 3 times, and ac power supply drives feathering 4 times.Number of times and each time of carrying out feathering that the time relay time delay is here carried out feathering by DC electrical source execution number of times and ac power supply are controlled, in the time of the change of feathering number of times and (or) each feathering time change, and the time of graded time lag relay.
By DC electrical source and ac power supply driving feathering controlling method for subsequent use each other; as long as guarantee direct current, to exchange feathering circuit You Yi road normal, can complete smoothly blower fan emergency feathering, improves the Security of wind-powered electricity generation unit; reduce the frequency of usage of direct current feathering circuit, protection battery simultaneously.
If Fig. 3 is by as shown in three electronic feathering system circuit diagram of time delay relay control, the invention provides a kind of electronic feathering control system, comprise DC electrical source 3, direct current feathering control switch KM5, AC driven power 4, frequency variator 7, exchange feathering control switch KM3, direct current generator 8 and emergency feathering control relay K1, after DC electrical source 3 and direct current feathering control switch KM5 series winding with AC driven power 4 with frequency variator 7 and exchange the circuit after feathering control switch KM3 contacts and connect, then, be connected to direct current generator 8, wherein, exchanging feathering control switch KM3 and direct current feathering control switch KM5 is interlocking design, by emergency feathering control relay, K1 controls respectively.
System also comprises main limit switch S1, spends limit switch for blade 91, and blade position reaches 91 degree, is triggered, and S1 disconnects, and needs in addition a redundancy limit switch S2, when blade position reaches 95 degree, is triggered, and S2 disconnects.Limit switch S2 can guarantee the safety brake of pitch motor when 91 degree limit switches lost efficacy at main limit switch.
System also comprises the control loop of interchange feathering control switch KM3 and the control loop of direct current feathering control switch KM5.The control loop that exchanges feathering control switch KM3 adopts ac control power supply 5 to power; The control loop of direct current feathering control switch KM5 adopts ups power 6 to power.
Exchange the control loop of feathering control switch KM3: contacted by the normally-closed contact of emergency feathering control relay K1 normally opened contact, limit switch S1, limit switch S2 and direct current feathering control switch KM5 and the coil that exchanges feathering control switch KM3;
The control loop of direct current feathering control switch KM5: by emergency feathering control relay K1 normally-closed contact, limit switch S1, limit switch S2 with exchange the normally-closed contact of feathering control switch KM3 and the coil of direct current feathering control switch KM3 is contacted.
The present invention also arranges time delay relay KT1, KT2 and KT3, and wherein KT1 controls the time of DC electrical source driving feathering; KT2 controls the time of ac power supply driving feathering; KT3 controls DC electrical source and the ac power supply cumulative time that drives successively feathering for subsequent use each other.
Exchange emergency feathering control switch K2 control loop by:
The normally opened contact of time delay relay KT1 with exchange emergency feathering control switch K2 coil series connection circuit,
The series connection circuit of the normally opened contact of time delay relay KT1 and time delay relay KT2 coil,
The series connection circuit of the normally-closed contact of time delay relay KT2 and time delay relay KT1 coil,
Be total to three-circuit and connect after normally-closed contact series winding composition and connection circuit and time delay relay KT3,
Again with time delay relay KT3 coil and connect,
Finally contact with relay K 4 normally-closed contacts again.
Wherein, relay K 4, by safety chain signal control, in the time there is theft-resistant link chain fault, EFC24V power supply dead electricity, relay K 4 disconnects.
In the time there is not theft-resistant link chain fault, emergency feathering control relay K1 closure, direct current feathering control switch KM5 disconnect, exchange feathering control switch KM3 closure, relay K 4 closures, exchange emergency feathering control switch K2 disconnection, and time delay relay KT1, KT2, KT3 do not work.
In the time there is theft-resistant link chain fault: relay K 4 disconnects, and makes time delay relay KT3 obtain electric.
(1) first carry out DC electrical source and drive feathering action.Now emergency feathering control relay K1 disconnects, and now, time delay relay KT1, KT2, KT3 are in off state, and therefore, the normally opened contact of time delay relay KT1 disconnects, the normally-closed contact closure of KT2; Due to the normally-closed contact closure of time delay relay KT2, cause time delay relay KT1 to obtain electric.
Because emergency feathering control relay K1 normally opened contact disconnects, disconnect so exchange feathering control switch KM3 control loop; Now do not trigger the normally-closed contact closure of (closure), interchange feathering control switch KM3 (disconnecting) due to emergency feathering control relay K1 normally-closed contact closure, limit switch, therefore the control loop conducting of direct current feathering control switch KM5, now drives feathering by DC electrical source 3.
Postpone after a period of time (being the delay time of time delay KT1): if limit switch S1 or S2 are not triggered, direct current feathering failure, continues to carry out next step; If limit switch S1 or S2 are triggered, direct current feathering success, exchanges the control loop of feathering control switch KM3 and the control loop of direct current feathering control switch KM5 and all disconnects, and native system is carried out and finished.
(2) if the failure of direct current feathering, carry out ac power supply and drive feathering action, when reaching after the delay time of time delay relay KT1, time delay relay KT1 conducting, time delay relay KT2, KT3 are in off state, now, the normally opened contact closure of time delay relay KT1, the normally-closed contact closure of time delay relay KT2; Due to the normally-closed contact closure of time delay relay KT2, cause time delay relay KT1 to continue electricly; Due to the normally opened contact closure of time delay relay KT1, cause, exchange emergency feathering control switch K2 and connect, time delay relay KT2 obtains electric.
Connect owing to exchanging emergency feathering control switch K2, emergency feathering control relay K1 conducting, the normally-closed contact of emergency feathering control relay K1 disconnects, so direct current emergency feathering control switch KM5 control loop disconnects; Now do not trigger the normally-closed contact closure of (closure), direct current feathering control switch KM5 (disconnecting) due to emergency feathering control relay K1 normally opened contact closure, limit switch, therefore exchange the control loop conducting of feathering control switch KM3, system is switched to the feathering circuit being driven by AC driven power 4 and continues to carry out feathering, postpone after a period of time (being the delay time of time delay relay KT2): if limit switch S1 or S2 are not triggered, exchange feathering failure, continue to carry out next step; If limit switch S1 or S2 are triggered, exchange feathering success, exchange the control loop of feathering control switch KM3 and the control loop of direct current feathering control switch KM5 and all disconnect, native system is carried out and is finished.
(3), if exchange feathering failure, continue to carry out DC electrical source and drive feathering action
When reaching after the delay time of time delay relay KT2, time delay relay KT2 conducting, the normally-closed contact of time delay relay KT2 disconnects, and time delay relay KT1 disconnects, cause the normally opened contact of time delay relay KT1 to disconnect, make time delay relay KT2 and exchange emergency feathering control switch K2 disconnection.Now, time delay relay KT1, KT2, KT3 are in off state.Due to, exchanging emergency feathering control switch K2 and disconnect, system continues execution step (1).
(4) total delay time arrives, and system is finished
Reach after the delay time of time delay relay KT3 when retard time, time delay relay KT3 conducting, now the normally-closed contact of time delay relay KT3 disconnects, therefore, time delay relay KT1, KT2 and K2 disconnect simultaneously, exchange emergency feathering control switch K2 control loop and quit work, exchange emergency feathering control switch K2 always in off state, native system is carried out and is finished.
Thus, in the time that limit switch S1, limit switch S2 are closed, also be that feathering is when unsuccessful, by the break-make of continuous control emergency feathering control relay K1, control being switched on or switched off of DC electrical source or AC driven power, reach according to first carrying out DC electrical source and drive feathering, then carry out the order of ac power supply driving feathering, drive feathering, until feathering success.
Therefore, as long as guarantee direct current, to exchange feathering circuit You Yi road normal, can complete smoothly blower fan emergency feathering, improves the Security of wind-powered electricity generation unit, reduces the frequency of usage of direct current feathering circuit, protection battery simultaneously.
Preferably, also comprise and exchange 400V control switch KM4, axle control cabinet 2 electric after, connect control switch KM4, exchange 400V power supply for frequency variator provides.
Preferably, also comprise AC circuit breaker Q1, AC driven power 4, AC circuit breaker Q1 and interchange 400V control switch KM4 are connected.
Preferably, also comprising dc circuit breaker Q2, is DC power supply switch, DC electrical source 3, direct current main power switch Q2 and DC electrical source feathering control switch KM5 series winding.
Wherein, 400V main power switch Q1, interchange 400V control switch KM4, frequency variator 7, interchange feathering control switch KM3, direct current main power switch Q2 and direct current feathering control switch KM5 are positioned at axle control cabinet 2.
If Fig. 3 is by as shown in three electronic feathering system circuit diagram of time delay relay control, in figure, each device is (only listing the distinguishing electrical equipment with Fig. 2):
K1:24V control relay, emergency feathering control relay, by two path control signal control:
3) be theft-resistant link chain EFC SC sigmal control, in the time there is theft-resistant link chain fault, EFC24V power supply dead electricity, triggers EFC
Signal (low level), emergency feathering control relay K1 disconnects;
4) control by exchanging emergency feathering control switch K2, when theft-resistant link chain fault occurs, and when the failure of direct current feathering,
Exchange emergency feathering control switch K2 conducting, controlling emergency feathering control relay K1 conducting (is that 24V is high
Level), carry out and exchange emergency feathering; In the time of interchange feathering also failure, exchange emergency feathering control switch K2
Disconnect, control emergency feathering control relay K1 and disconnect (being 0V low level), carry out direct current emergency feathering.
K2: control relay, exchanges emergency feathering control switch.By relay K 4, and three time delay relay KT1, KT2 and KT3 acting in conjunction, K2 conducting and disconnection controlled.
K4: control relay, by safety chain signal control, in the time there is theft-resistant link chain fault, EFC24V power supply dead electricity, relay K 4 disconnects.
KT1: obtaining electric time lagged type time delay relay, is the time that DC electrical source drives feathering, and the delay time of KT1 can be the random time between 12 seconds to 20 seconds, preferably 15 seconds.
KT2: obtaining electric time lagged type time delay relay, is the time that ac power supply drives feathering, and the delay time of KT2 can be the random time between 12 seconds to 20 seconds, preferably 15 seconds.
KT3: obtain electric time lagged type time delay relay, for total feathering time, the delay time of KT3 can be the random time between 94 seconds to 140 seconds, preferably 105 seconds, in the present invention, the set of time of KT3 is time=(time of KT1 time delay) × 4 times+(time of KT2 time delay) × 3 times of KT3 time delay, also drives number of times and its set of time needing separately of feathering according to ac/Dc power.
Embodiment three: by the break-make of time delay relay control DC electrical source and ac power supply, carry out first and drive feathering to be driven the method for feathering by ac power supply by DC electrical source again.
Certainly, feathering system also can only be carried out a DC electrical source and drive the method for feathering, if carry out the method for an ac power supply driving feathering after feathering failure again.
If Fig. 1 system flow chart and Fig. 4 are by as shown in two electronic feathering system circuit diagram of time delay relay control,
A kind of electronic feathering controlling method, in the time of theft-resistant link chain fault, triggers EFC signal, and EFC signal becomes low level, and emergency feathering control relay K1 disconnects, and carries out following steps:
The first step, because emergency feathering control relay K1 disconnects, causes AC driven power disconnection, DC electrical source conducting, and now system execution is the method for direct current generator for electric drive feathering by described DC electrical source.
Second step, whether system detects feathering successful: after emergency feathering control relay K1 disconnects, by time delay relay control time delay 15 seconds, whether monitoring 91 degree limit switches or 95 degree limit switches are triggered, if "Yes", feathering success, native system is carried out and is finished.If the failure of "no" feathering, carries out next step.
The 3rd step, when DC electrical source drives after feathering failure, carry out ac power supply feathering method: now by time delay relay, control and exchange emergency feathering control switch K2 conducting, then, emergency feathering control relay K1 conducting, cause DC electrical source disconnection, AC driven power to be connected, and by the given feathering angle of master control (91 degree), it is direct current generator power supply by frequency variator that system is carried out by described AC driven power, drives the method for feathering.
The 4th step, when time delay relay time delay is after 15 seconds, after AC driven power drives feathering to complete, now, if 91 degree limit switches or 95 degree limit switches are triggered, ac power supply drives feathering to complete, and exchanges emergency feathering control switch K2 and disconnects, emergency feathering control relay K1 disconnects, and native system is carried out and finished; If 91 degree limit switches or 95 degree limit switches are not triggered, ac power supply drives feathering failure, exchanges emergency feathering control switch K2 and disconnects, and emergency feathering control relay K1 disconnects, and native system is carried out and finished.
Drive feathering controlling method by the power supply of increasing exchanges as standby power supply, as long as guarantee direct current, to exchange feathering circuit You Yi road normal, can complete smoothly blower fan emergency feathering, improves the Security of wind-powered electricity generation unit.
If Fig. 4 is by as shown in two electronic feathering system circuit diagram of time delay relay control, the invention provides a kind of electronic feathering control system, comprise DC electrical source 3, direct current feathering control switch KM5, AC driven power 4, frequency variator 7, exchange feathering control switch KM3, direct current generator 8 and emergency feathering control relay K1, after DC electrical source 3 and direct current feathering control switch KM5 series winding with AC driven power 4 with frequency variator 7 and exchange the circuit after feathering control switch KM3 contacts and connect, then, be connected to direct current generator 8, wherein, exchanging feathering control switch KM3 and direct current feathering control switch KM5 is interlocking design, by emergency feathering control relay, K1 controls respectively.
System also comprises main limit switch S1, spends limit switch for blade 91, and blade position reaches 91 degree, is triggered, and S1 disconnects, and needs in addition a redundancy limit switch S2, when blade position reaches 95 degree, is triggered, and S2 disconnects.Limit switch S2 can guarantee the safety brake of pitch motor when 91 degree limit switches lost efficacy at main limit switch.
System also comprises the control loop of interchange feathering control switch KM3 and the control loop of direct current feathering control switch KM5.The control loop that exchanges feathering control switch KM3 adopts ac control power supply 5 to power; The control loop of direct current feathering control switch KM5 adopts ups power 6 to power.
Exchange the control loop of feathering control switch KM3: contacted by the normally-closed contact of emergency feathering control relay K1 normally opened contact, limit switch S1, limit switch S2 and direct current feathering control switch KM5 and the coil that exchanges feathering control switch KM3;
The control loop of direct current feathering control switch KM5: by emergency feathering control relay K1 normally-closed contact, limit switch S1, limit switch S2 with exchange the normally-closed contact of feathering control switch KM3 and the coil of direct current feathering control switch KM3 is contacted.
The present invention also arranges time delay relay KT1, KT2, and wherein, the ON time that exchanges emergency feathering control switch K2 is the delay time of delay time-time delay relay KT1 of time delay relay KT2; The delay time that the time that exchanges emergency feathering control switch K2 disconnection is KT1, KT2 delay time is greater than the delay time of KT1.
System also comprises control relay K4, by safety chain signal control, and in the time there is theft-resistant link chain fault, EFC24V power supply dead electricity, relay K 4 disconnects.
KT1/KT2 control loop: circuit series winding after relay K 4 normally-closed contacts and time delay relay KT1 and time delay relay KT2 in parallel;
Exchange emergency feathering control switch K2 control loop: the normally opened contact of time delay relay KT1, the normally-closed contact of time delay relay KT2 and exchanges emergency feathering control switch K2 coil and contact.
In the time there is not theft-resistant link chain fault, emergency feathering control relay K1 closure, relay K 4 closures, interchange emergency feathering control switch K2 disconnect, direct current feathering control switch KM5 disconnects, exchanges feathering control switch KM3 closure, and time delay relay KT1, time delay relay KT2 do not work.
In the time there is theft-resistant link chain fault: relay K 4 disconnects, and makes time delay relay KT1, KT2 obtain electric.
(1) first carry out DC electrical source and drive feathering action, emergency feathering control relay K1 disconnects.Because the normally opened contact of time delay relay KT1 disconnects, disconnect so exchange emergency feathering control switch K2 control loop.
Due to, emergency feathering control relay K1 disconnects, and emergency feathering control relay K1 normally opened contact disconnects, and disconnects so exchange feathering control switch KM3 control loop; Now do not trigger the normally-closed contact closure of (closure), interchange feathering control switch KM3 (disconnecting) due to emergency feathering control relay K1 normally-closed contact closure, limit switch, therefore the control loop conducting of direct current feathering control switch KM5, now drives feathering by DC electrical source 3.
Postpone after a period of time (being the delay time of time delay KT1): if limit switch S1 or S2 are not triggered, direct current feathering failure, continues to carry out next step; If limit switch S1 or S2 are triggered, direct current feathering success, exchanges the control loop of feathering control switch KM3 and the control loop of direct current feathering control switch KM5 and all disconnects, and native system is carried out and finished.
(2) if the failure of direct current feathering, carry out ac power supply and drive feathering action, when reaching after the delay time of time delay relay KT1, time delay relay KT1 conducting, time delay relay KT2 disconnects, now, and the normally opened contact closure of time delay relay KT1, the normally-closed contact closure of time delay relay KT2, exchanges emergency feathering control switch K2 and connects.
Connect owing to exchanging emergency feathering control switch K2, emergency feathering control relay K1 conducting, the normally-closed contact of emergency feathering control relay K1 disconnects, so direct current emergency feathering control switch KM5 control loop disconnects; Now do not trigger the normally-closed contact closure of (closure), direct current feathering control switch KM5 (disconnecting) due to emergency feathering control relay K1 normally opened contact closure, limit switch, therefore exchange the control loop conducting of feathering control switch KM3, system is switched to the feathering circuit being driven by AC driven power 4 and continues to carry out feathering.
(delay time that is time delay relay KT2 arrives to postpone a period of time, apart from the ON time of time delay relay KT1 be now: the delay time of delay time-KT1 of KT2) after: if limit switch S1 or S2 are not triggered, exchange feathering failure; If limit switch S1 or S2 are triggered, exchange feathering success, native system is carried out and is finished.
(3) exchange feathering and be finished, when reaching after the delay time of time delay relay KT2, time delay relay KT2 conducting, therefore the normally-closed contact of time delay relay KT2 disconnects, cause exchanging emergency feathering control switch K2 and disconnect, emergency feathering control signal K1 disconnects, and native system is carried out and finished.
Preferably, also comprise and exchange 400V control switch, axle control cabinet 2 electric after, switch on power, exchange 400V power supply for frequency variator provides.
Preferably, also comprising AC circuit breaker Q1, is 400V power switch, and AC driven power 4, ac power switch Q1 and interchange 400V control switch KM4 are connected.
Preferably, also comprising dc circuit breaker Q2, is DC power supply switch, DC electrical source 3, direct current main power switch Q2 and DC electrical source feathering control switch KM5 series winding.
Wherein, 400V main power switch Q1, interchange 400V control switch KM4, frequency variator 7, interchange feathering control switch KM3, direct current main power switch Q2 and direct current feathering control switch KM5 are positioned at axle control cabinet 2.
If Fig. 4 is by as shown in two electronic feathering system circuit diagram of time delay relay control, in figure, each device is (only listing the distinguishing electrical equipment with Fig. 2):
K1:24V control relay, emergency feathering control relay, by two path control signal control:
1) be theft-resistant link chain EFC SC sigmal control, in the time there is theft-resistant link chain fault, EFC24V power supply dead electricity, triggers EFC
Signal (low level), emergency feathering control relay K1 disconnects;
2) control by exchanging emergency feathering control switch K2, when theft-resistant link chain fault occurs, and when the failure of direct current feathering,
Exchange emergency feathering control switch K2 conducting, controlling emergency feathering control relay K1 conducting (is that 24V is high
Level), carry out and exchange emergency feathering; After ac power supply drives feathering to complete, exchange emergency feathering control and open
Close K2 and disconnect, control emergency feathering control relay K1 and disconnect (being 0V low level), carry out direct current urgent
Feathering.
K2: control relay, exchanges emergency feathering control switch.By relay K 4, and two time delay relay KT1, KT2 acting in conjunction, control K2 conducting and disconnection, in the time of theft-resistant link chain fault, it controls emergency feathering control relay K1.
K4: control relay, by safety chain signal control, in the time there is theft-resistant link chain fault, EFC24V power supply dead electricity, relay K 4 disconnects.
KT1: obtain electric time lagged type time delay relay, control the time that emergency feathering control switch K2 disconnects that exchanges.The time of time delay can be the random time between 12 seconds to 20 seconds, preferably 15 seconds.
KT2: obtain electric time lagged type time delay relay, control with mono-of KT1 the ON time (delay time of delay time-time delay relay KT1 of time delay relay KT2) that exchanges emergency feathering control switch K2, the delay time of KT2 is greater than the delay time of KT1.The time of time delay can be the random time between 24 seconds to 40 seconds, preferably 30 seconds.
The above is only preferred embodiment of the present invention, not the present invention is done to any pro forma restriction, although the present invention discloses as above with preferred embodiment, but not in order to limit the present invention, any technician who is familiar with this patent is not departing within the scope of technical solution of the present invention, when can utilizing the technology contents of above-mentioned prompting to make a little change or being modified to the equivalent embodiment of equivalent variations, in every case be the content that does not depart from technical solution of the present invention, any simple modification of above embodiment being done according to technical spirit of the present invention, equivalent variations and modification, all still belong in the present invention program's scope.
Claims (10)
1. an electronic feathering controlling method, carry out following steps:
(1) when detecting after theft-resistant link chain fault, theft-resistant link chain EFC signal output low level, described emergency feathering control relay K1 disconnects;
(2) because emergency feathering control relay K1 disconnects, cause AC driven power disconnection, DC electrical source conducting, now system execution is the method for direct current generator for electric drive feathering by described DC electrical source;
(3) drive after the method for feathering when executing by described DC power supply, whether successfully detect feathering: if feathering success, system is carried out and finished, if feathering failure performs step (4);
(4) when described DC power supply drives after the method failure of feathering, by emergency feathering control relay K1 conducting described in the control of time relay group, cause described DC electrical source disconnection, described AC driven power to be connected, it is direct current generator power supply by frequency variator that system is carried out by described AC driven power, drives the method for feathering;
(5) when executing after the method for AC driven power for electric drive feathering, whether successfully detect feathering: if feathering success, system is carried out and is finished, if feathering failure, system performs step (2) method by DC power supply driving feathering again.
2. electronic feathering controlling method according to claim 1, is characterized in that, when blade pitch angle is 91 degree or 95 while spending, and feathering success, otherwise feathering failure.
3. electronic feathering controlling method according to claim 1, is characterized in that, also comprises the interchange feathering control switch for controlling described AC driven power conducting or disconnection; With the direct current feathering control switch for controlling described DC electrical source conducting or disconnection, described interchange feathering control switch and described direct current feathering control switch are interlocking designs, are controlled respectively the break-make of described interchange feathering control switch and described direct current feathering control switch by described emergency feathering control relay K1.
4. electronic feathering controlling method according to claim 1, is characterized in that, alternately carries out by DC power supply and drives the method for feathering and be no more than 140 seconds, particularly 105 seconds by AC driven power for the time of electric drive feathering method.
5. according to the electronic feathering control system of electronic feathering controlling method described in claim 1-4 any one, it is characterized in that: comprise DC electrical source (3), direct current feathering control switch KM5, AC driven power (4), frequency variator (7), exchange feathering control switch KM3, direct current generator (8), emergency feathering control relay K1, exchange emergency feathering control switch K2 and theft-resistant link chain EFC signal, wherein
Described theft-resistant link chain EFC signal is provided by slip ring wheel hub by cabin;
The normally opened contact of described interchange emergency feathering control switch K2, with described theft-resistant link chain EFC signal and after connecting, then contacts with the coil of described emergency feathering control relay K1;
The series connection circuit of described DC electrical source (3) and described direct current feathering control switch KM5, described AC driven power (4) and described frequency variator (7) and the described series connection circuit that exchanges feathering control switch KM3, altogether two-way circuit and connect rear composition and connection circuit, contact with described direct current generator (8), described interchange feathering control switch KM3 and described direct current feathering control switch KM5 are interlocking designs, are controlled respectively the break-make of described interchange feathering control switch KM3 and described direct current feathering control switch KM5 by described emergency feathering control relay K1.
6. electronic feathering control system according to claim 5, is characterized in that, also comprises relay K 4, and described relay K 4 also connects with described theft-resistant link chain EFC signal.
7. electronic feathering control system according to claim 6, is characterized in that, also comprise time delay relay KT1, time delay relay KT2 and time delay relay KT3, wherein, the delay time of described time delay relay KT1 is between 12 seconds to 20 seconds, preferably 15 seconds; The delay time of described time delay relay KT2 is between 12 seconds to 20 seconds, preferably 15 seconds; The delay time of described time delay relay KT3 is between 84 seconds to 140 seconds, preferably 105 seconds;
The normally opened contact of described time delay relay KT1 and the described series connection circuit that exchanges emergency feathering control switch K2 coil,
The series connection circuit of the normally opened contact of described time delay relay KT1 and described time delay relay KT2 coil,
The series connection circuit of the normally-closed contact of described time delay relay KT2 and described time delay relay KT1 coil,
Be total to three-circuit and connect after normally-closed contact series winding composition and connection circuit and described time delay relay KT3,
Again with described time delay relay KT3 coil and connect and connection circuit,
Normally-closed contact last and described relay K 4 is contacted.
8. electronic feathering control system according to claim 7, is characterized in that, also comprises 91 degree limit switch S1 and 95 degree limit switch S2, when blade pitch angle is 91 while spending, triggers limit switch S1, i.e. described limit switch S1 closure; When blade pitch angle is 95 while spending, trigger limit switch S2, i.e. described limit switch S2 closure.
9. electronic feathering control system according to claim 8, it is characterized in that the normally-closed contact of the normally opened contact of described emergency feathering control relay K1, described limit switch S1, described limit switch S2, described interchange feathering control switch KM3 and the coil of described direct current feathering control switch KM5 series winding.
10. electronic feathering control system according to claim 8, it is characterized in that the normally-closed contact of the normally-closed contact of described emergency feathering control relay K1, described limit switch S1, described limit switch S2, described direct current feathering control switch KM5 and the described coil series winding that exchanges feathering control switch KM3.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105257472A (en) * | 2015-11-06 | 2016-01-20 | 湘电风能有限公司 | Safety control method for direct-drive fan direct-current pitch varying system |
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| CN101624969A (en) * | 2009-08-04 | 2010-01-13 | 清华大学 | Redundancy control system and redundancy control method for wind power generation propeller change |
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| CN202545111U (en) * | 2012-04-16 | 2012-11-21 | 上海致远绿色能源有限公司 | Blackout feathering control system of permanent magnet variable pitch wind-driven generator set |
| CN203502224U (en) * | 2013-10-24 | 2014-03-26 | 沈阳华创风能有限公司 | Wind generating set electric variable propeller pitch experiment platform |
| CN203879683U (en) * | 2014-06-20 | 2014-10-15 | 北京普华亿能风电技术有限公司 | Electric feathering control system |
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| CN101624969A (en) * | 2009-08-04 | 2010-01-13 | 清华大学 | Redundancy control system and redundancy control method for wind power generation propeller change |
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| CN202545111U (en) * | 2012-04-16 | 2012-11-21 | 上海致远绿色能源有限公司 | Blackout feathering control system of permanent magnet variable pitch wind-driven generator set |
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| CN105257472A (en) * | 2015-11-06 | 2016-01-20 | 湘电风能有限公司 | Safety control method for direct-drive fan direct-current pitch varying system |
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