CN106503370A - Large-scale wind electricity set yaw choice of electrical machine method and the determination method of driving torque - Google Patents

Abstract

The present invention relates to the determination method of large-scale wind electricity set yaw choice of electrical machine method and driving torque, the driving torque determines that method is：Wind turbines phantom is set up, outer load, tilting moment, axial force, radial force, yaw rotating speed and acceleration suffered by yaw under extreme operating condition is solved；According to above-mentioned parameter, yaw raceway moment of friction is calculated；The mechanical model that sets up during set yaw, solves the yaw motor driving torque in During yaw.The selection method is：According to the yaw motor driving torque of each time point, the virtual value and maximum virtual value of tired operating mode yaw motor driving torque is calculated, the rated value of pre-selection yaw motor is determined, yaw motor is selected according to rated value and driving torque peak value Mp.The principle of the invention is simple, easy to operate, high precision, and unit safety reliability is high, effectively reduces off-course brake clamp load, reduces the abrasion condition of Yaw brake block, extends driftage maintenance period, reduces the maintenance cost of unit.

Description

Large-scale wind electricity set yaw choice of electrical machine method and the determination method of driving torque

Technical field

Present invention relates generally to wind-powered electricity generation equipment field, and in particular to a kind of large-scale wind electricity set yaw choice of electrical machine method And the determination method of driving torque.

Background technology

Wind energy is used as a kind of one of new forms of energy of technology maturation, it has also become energy industry focus of attention, with filling in recent years The rapid raising of machine amount, wind-powered electricity generation operator propose higher requirement to the economic benefit of unit and reliability service.Yaw system is made For the critical component of Wind turbines, can which make wind wheel all the time in upwind position, directly decide the power benefit of unit, with When off-course brake unit safety operation and the pre-fastening moment needed for halted state can be provided, it is ensured that the safety of unit.

Yaw motor driving torque directly determines the reliability of yaw system work, selects suitable computational methods not only Off-course brake clamp load can effectively be reduced, the abrasion condition of Yaw brake block is reduced, extended driftage maintenance period, reduced The maintenance cost of unit, can also reduce yaw motor capacity, reduce unit cost.

Content of the invention

The invention provides the determination method of large-scale wind electricity set yaw choice of electrical machine method and driving torque, effectively to drop Low off-course brake clamp load, reduces the abrasion condition of Yaw brake block, extends driftage maintenance period, reduces the maintenance of unit Cost.

For achieving the above object, the determination method of large-scale wind electricity set yaw motor driving torque of the invention includes as follows Step：

1) Wind turbines phantom is set up, outer load, tilting moment, axial direction suffered by yaw under extreme operating condition is solved Power, radial force, yaw rotating speed and acceleration；

2) outer load, tilting moment, axial force, radial force and bearing track pretightning force according to suffered by yaw, calculate partially Boat raceway moment of friction；

3) mechanical model that sets up during set yaw, solves yaw motor in During yaw according to the mechanical model Driving torque time serieses load；The mechanical model includes that Rule of judgment is：Yaw rotating speed is more than zero or yaw Acceleration is more than zero, and including model parameter：Outer load, off-course brake pre-fastening moment and yaw friction suffered by yaw Torque.

Step 3) in the computational methods of driving torque time serieses load of yaw motor comprise the steps：

A) yaw motor driving torque peak value M is set_p；

B) a time point yaw motor driving torque is calculated：If M_act≤ M_p, then the driving torque of the time point is M_act；

Otherwise, the time point yaw motor driving torque isSimultaneously compare Mp with M′_actSize, if Mp<M′_act, make M_p=M '_act, as the yaw motor driving torque peak value of future time point, if Mp >= M′_act, M_pConstant；Wherein, M_zFor carrying outside yaw, M_fFor yaw raceway moment of friction, M_{c_yaw}Pre- for off-course brake Clamp force square, i are yaw system gear ratio, and η is transmission efficiency, and N is yaw motor quantity；

C) repeat step B), the final yaw motor driving torque for obtaining Each point in time in During yaw.

The step 2) in yaw raceway moment of friction M_fComputing formula be：

Wherein, M_xyFor tilting moment, D_LFor raceway diameter, F_zFor axial force, F_xyFor radial force, M_preRoll for bearing Road pretightning force, μ are coefficient of friction.

The step 1) in using Wind turbines prototyping component relevant parameter, import peripheral control unit, set up and wind turbine The dummy model model machine that group model machine function phase is worked as.

The step 1) in fatigue and limiting condition setting condition strictly observe Wind turbines certification guide GL regulation, if Determine unit external condition and running status, simulate Wind turbines actual bearer situation.

The present invention large-scale wind electricity set yaw choice of electrical machine method be：First according to above-mentioned large-scale wind electricity set yaw electricity The determination method of machine driving torque solves the driving torque time serieses load of yaw motor；According to each time point of tired operating mode Yaw motor driving torque M_act, calculate virtual value M of yaw motor driving torque_{act_RMS}, count yaw motor driving Rated value of the maximum virtual value of moment of torsion as pre-selection yaw motor, the rated value and yaw motor according to pre-selection yaw motor drive Dynamic torque peak value selectes required yaw motor.

The virtual value of the yaw motor driving torque is RMS is represented and is asked for root-mean-square value, M_zFor carrying outside yaw, M_fFor yaw raceway moment of friction, M_{c_yaw}For yaw brake Device pre-fastening moment, i are yaw system gear ratio, and η is transmission efficiency, and N is yaw motor quantity.

Step 3) in the computational methods of driving torque time serieses load of yaw motor comprise the steps：

A) yaw motor driving torque peak value M is set_p；

B) a time point yaw motor driving torque is calculated：If M_act≤ M_p, then the driving torque of the time point is M_act；

Otherwise, the time point yaw motor driving torque isSimultaneously compare Mp with M′_actSize, if Mp<M′_act, make M_p=M '_act, as the yaw motor driving torque peak value of future time point, if Mp >= M′_act, M_pConstant；Wherein, M_zFor carrying outside yaw, M_fFor yaw raceway moment of friction, M_{c_yaw}Pre- for off-course brake Clamp force square, i are yaw system gear ratio, and η is transmission efficiency, and N is yaw motor quantity；

C) repeat step B), the final yaw motor driving torque for obtaining Each point in time in During yaw.

The invention has the beneficial effects as follows：The driving torque of the present invention determines that method is built by setting up phantom, calculating The model parameter of the driftage mechanical model in During yaw, using force balance principle, solves the effective of yaw motor driving torque Value, it is determined that the pre-program of yaw motor, introduces passive yawing, on the basis of ensureing that driftage function is smoothly realized, effectively The driving torque of yaw motor is reduced, the cost of yaw system so as to reduce capacity motor, is reduced.

Description of the drawings

Fig. 1 is yaw system model schematic；

Fig. 2 is yaw motor driving torque solution procedure and yaw motor type selecting schematic diagram.

Specific embodiment

Below in conjunction with the accompanying drawings, technical scheme is further described in detail.

The determination embodiment of the method for the large-scale wind electricity set yaw motor driving torque of the present invention

The method comprises the steps：

1) Wind turbines phantom is set up, outer load, tilting moment, axial direction suffered by yaw under extreme operating condition is solved Power, radial force, yaw rotating speed and acceleration；

2) outer load, tilting moment, axial force, radial force and bearing track pretightning force according to suffered by yaw, calculate partially Boat raceway moment of friction；

3) mechanical model that sets up during set yaw, solves yaw motor in During yaw according to the mechanical model Driving torque time serieses load；The mechanical model includes Rule of judgment：Yaw rotating speed is more than zero or yaw adds Speed is more than zero, and including model parameter：Outer load, off-course brake pre-fastening moment and yaw frictional force suffered by yaw Square.

Below each step of above-described embodiment is elaborated：

For step 1) in using Wind turbines prototyping component relevant parameter, import peripheral control unit, set up and wind turbine The dummy model model machine that group model machine function phase is worked as.

Setting requirements according to tired operating mode and limiting condition carry out simulation calculation to Wind turbines phantom, fatigue and The setting condition of limiting condition strictly observes Wind turbines certification guide GL regulations, sets unit external condition and running status, Simulate Wind turbines actual bearer situation as far as possible, derive outer load M suffered by yaw_z, tilting moment M_xy, axial force F_zAnd footpath To power F_xyTime serieses load and the corresponding yaw rotational speed omega of each time point_yWith yaw acceleration a_yTime sequence Row；

So obtained by emulation comprising the various extreme operating conditions run into by the unit durability cycle in simulation process as far as possible Carry outside suffered by the outer time serieses for carrying suffered by the yaw for obtaining are actual with yaw as close as possible.

For step 2), solve yaw raceway moment of friction：According to Rolix and other men of Bearing Factory to raceway The regulation of frictional force, raceway moment of friction and raceway diameter D_L, coefficientoffrictionμ, tilting moment M_xy, axial force F_z, Radial force F_xyAnd raceway pretightning force M_preCorrelation, calculating yaw raceway moment of friction by following formula is：

For step 3) mechanical model set up during set yaw, the mechanical model of the During yaw is to include sentencing Broken strip part：Yaw rotational speed omega_yWith yaw acceleration a_yBe all higher than 0, i.e., | ω_y|>0 or | a_y|>0；Also join comprising model Number：M is carried outside yaw_z, off-course brake pre-fastening moment M_{c_yaw}, yaw moment of friction M_fAnd yaw motor braking torque M_b, yaw system gear ratio i, the mechanical model of transmission efficiency η and yaw motor quantity N.By to step 1) in solved Time serieses load is calculated, to solve the driving torque M of yaw motor in During yaw_act, given below meet condition |ω_y|>0 or | a_y|>0 yaw motor driving torque M_actConcrete solution procedure：

1) set yaw motor first and drive peak value M_p；

2) then according to formulaThe driving torque of certain time point is solved, if M_act≤ M_p, then the time point yaw system belong to active yawing, driving torque is M_act, otherwise the time point yaw system belong to passive partially Boat, yaw motor are dragged in the presence of wind load, and yaw motor driving torque adopts formula Ask for, i.e., the yaw motor driving torque of the time point is M '_act, subsequently determine that Mp and M '_actSize, if Mp<M′_act, then Increase M_pEven, M_p=M '_act, by this M_pCalculating for next time point driving torque judges, if Mp >=M '_act, then M_pNo Become, still the yaw motor as next time point drives peak value；

3) 2) repeat step calculates the driving torque of all time points, and finally gives M_pIt is more than or equal to all times The driving torque of point, the driving torque time sequence of yaw motor in the yaw motor driving torque composition During yaw of each time point List lotus.

The large-scale wind electricity set yaw choice of electrical machine embodiment of the method for the present invention

The method is：Driving torque M according to the yaw motor of each time point of tired operating mode_act, calculate yaw motor and drive Virtual value M of moment of torsion_{act_RMS}, the maximum virtual value of yaw motor driving torque is counted as the specified of pre-selection yaw motor Value；Final yaw motor according to needed for the rated value and yaw motor driving torque peak value of pre-selection yaw motor are selected.Specially：

3) driftage that is tried to achieve according to the step of the determination embodiment of the method for large-scale wind electricity set yaw motor driving torque The driving torque of motor, solves the virtual value of yaw motor driving torque time serieses load under each tired operating mode, that is, electricity of going off course The root-mean-square value of machine driving torque time serieses load, formula is：

The maximum virtual value of yaw motor driving torque time serieses load is counted as the specified of pre-selection yaw motor Value.

Determination method according to large-scale wind electricity set yaw motor driving torque can obtain yaw motor in During yaw Driving torque time serieses load and yaw motor drive peak value, drive peak value to be used for yaw motor choosing the yaw motor Type, i.e. final yaw motor according to needed for two parameters of rated value and yaw motor peak value of pre-selection yaw motor are chosen.

The above is only the preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned enforcement reality Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.Those skilled in the art are using above-mentioned Technology contents are made a little simple modification, equivalent numbering or are modified, and belong to protection scope of the present invention.

Claims (8)

1. the determination method of large-scale wind electricity set yaw motor driving torque, it is characterised in that the method comprises the steps：

1) set up Wind turbines phantom, solve under extreme operating condition outer load suffered by yaw, tilting moment, axial force, Radial force, yaw rotating speed and acceleration；

2) outer load, tilting moment, axial force, radial force and bearing track pretightning force according to suffered by yaw, calculate yaw axis Hold raceway moment of friction；

3) mechanical model that sets up during set yaw, according to the drive that the mechanical model solves yaw motor in During yaw Dynamic torque time serieses load；The mechanical model includes that Rule of judgment is：Yaw rotating speed is more than zero or yaw accelerates Degree is more than zero, and including model parameter：Outer load, off-course brake pre-fastening moment and yaw frictional force suffered by yaw Square.

2. the determination method of large-scale wind electricity set yaw motor driving torque according to claim 1, it is characterised in that step 3) computational methods of the driving torque time serieses load of the yaw motor in comprise the steps：

A) yaw motor driving torque peak value M is set_p；

B) a time point yaw motor driving torque is calculated：If M_act≤M_p, then The driving torque of the time point is M_act；

Otherwise, the time point yaw motor driving torque isCompare Mp and M ' simultaneously_act Size, if Mp<M′_act, make M_p=M '_act, as the yaw motor driving torque peak value of future time point, if Mp >=M ′_act, M_pConstant；Wherein, M_zFor carrying outside yaw, M_fFor yaw raceway moment of friction, M_{c_yaw}For off-course brake pretension Torque, i are yaw system gear ratio, and η is transmission efficiency, and N is yaw motor quantity；

C) repeat step B), the final yaw motor driving torque for obtaining Each point in time in During yaw.

3. the determination method of large-scale wind electricity set yaw motor driving torque according to claim 1, it is characterised in that described Step 2) in yaw raceway moment of friction M_fComputing formula be：

$M_f=\frac{\mathrm{\&mu;}}{2}(4.4M_{xy}+D_L\&CenterDot;|F_z|+3.806F_{xy}\&CenterDot;D_L)+M_{pre}$

Wherein, M_xyFor tilting moment, D_LFor raceway diameter, F_zFor axial force, F_xyFor radial force, M_prePre- for raceway Clamp force, μ are coefficient of friction.

4. the determination method of large-scale wind electricity set yaw motor driving torque according to claim 1, it is characterised in that described Step 1) in using Wind turbines prototyping component relevant parameter, import peripheral control unit, set up and Wind turbines model machine function phase When dummy model model machine.

5. the determination method of large-scale wind electricity set yaw motor driving torque according to claim 1, it is characterised in that described Step 1) in fatigue and limiting condition setting condition strictly observe Wind turbines certification guide GL regulation, set unit outer strip Part and running status, simulate Wind turbines actual bearer situation.

6. the large-scale wind electricity machine of a kind of determination method of large-scale wind electricity set yaw motor driving torque described in employing claim 1 Group yaw motor selection method, it is characterised in that according to the driving torque M of the yaw motor of each time point of tired operating mode_act, meter Calculate virtual value M of yaw motor driving torque_act_ RMS, counts the maximum virtual value of yaw motor driving torque as pre-selection The rated value of yaw motor, driftage electricity according to needed for the rated value and yaw motor driving torque peak value of pre-selection yaw motor are selected Machine.

7. large-scale wind electricity set yaw choice of electrical machine method according to claim 6, it is characterised in that the yaw motor drives The virtual value of dynamic torque isRMS is represented and is asked for root-mean-square value, M_zFor Carry outside yaw, M_fFor yaw raceway moment of friction,For off-course brake pre-fastening moment, i is yaw system Gear ratio, η are transmission efficiency, and N is yaw motor quantity.

8. large-scale wind electricity set yaw choice of electrical machine method according to claim 6, it is characterised in that

Step 3) in the computational methods of driving torque time serieses load of yaw motor comprise the steps：

A) yaw motor driving torque peak value M is set_p；

B) a time point yaw motor driving torque is calculated：If M_act≤M_p, then should The driving torque of time point is M_act；

Otherwise, the time point yaw motor driving torque isCompare Mp and M ' simultaneously_act Size, if Mp<M′_act, make M_p=M '_act, as the yaw motor driving torque peak value of future time point, if Mp >=M ′_act, M_pConstant；Wherein, M_zFor carrying outside yaw, M_fFor yaw raceway moment of friction,Pre- for off-course brake Clamp force square, i are yaw system gear ratio, and η is transmission efficiency, and N is yaw motor quantity；

C) repeat step B), the final yaw motor driving torque for obtaining Each point in time in During yaw.