CN113503224B - Resonance crossing method for series-type reverse-rotation double-impeller wind generating set - Google Patents
Resonance crossing method for series-type reverse-rotation double-impeller wind generating set Download PDFInfo
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- 238000010248 power generation Methods 0.000 abstract description 3
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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
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
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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
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/04—Automatic control; Regulation
- F03D7/042—Automatic control; Regulation by means of an electrical or electronic controller
- F03D7/043—Automatic control; Regulation by means of an electrical or electronic controller characterised by the type of control logic
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/04—Control effected upon non-electric prime mover and dependent upon electric output value of the generator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/28—The renewable source being wind energy
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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
-
- 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
- Y02E10/76—Power conversion electric or electronic aspects
Abstract
The invention relates to the field of wind power generation, in particular to a resonance crossing method of a series-type counter-rotating double-impeller wind generating set, which comprises the following steps: s1, a control system collects information such as wind speed and direction, rotating speed, torque, power, blade angle and the like of a front impeller and a rear impeller; and S2, presetting a resonance frequency point by the control system, calculating the rotating speed set points of the front impeller and the rear impeller by a rotating speed set point control algorithm by combining the collected information of the front impeller and the collected information of the rear impeller, transmitting the rotating speed set point of the front impeller to the front impeller control module, and transmitting the rotating speed set point of the rear impeller to the rear impeller control module. The invention can realize the resonance crossing of the tandem type reverse rotation double-impeller wind generating set and provides a technical basis for the operation stability of the double-impeller wind generating set.
Description
Technical Field
The invention relates to the field of wind power generation, in particular to a resonance crossing method of a series-type reverse rotation double-impeller wind generating set.
Background
At present, the mainstream wind generating sets are single-impeller wind generating sets, and the single-impeller wind generating sets comprise impellers, a variable pitch system, a gear box, a power transmission device, a generator, a power adjusting device and control and monitoring software. Due to the evaluation of the internet surfing pressure, research on wind generating sets with efficient wind energy conversion is urgently needed. The double-impeller wind generating set has high-efficiency wind energy capturing capacity, but the frequency superposition is more complex than the frequency characteristic of a single-impeller set, and the control strategy for avoiding resonance is a technology which is urgently needed to be researched at present.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a resonance crossing method for a series-type reverse rotation double-impeller wind generating set, which can improve the safety of the wind generating set.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
a resonance crossing method of a series-type reverse rotation double-impeller wind generating set comprises the following steps:
s1, collecting information such as wind speed, wind direction, rotating speed, torque, power, blade angle and the like of a front impeller and a rear impeller by a control system;
and S2, presetting a resonance frequency point by the control system, calculating the rotating speed set points of the front impeller and the rear impeller by a rotating speed set point control algorithm by combining the collected information of the front impeller and the collected information of the rear impeller, transmitting the rotating speed set point of the front impeller to the front impeller control module, and transmitting the rotating speed set point of the rear impeller to the rear impeller control module.
On the basis of the scheme, the rotating speed set point control algorithm comprises the following steps: the device comprises a resonance rotating speed calculation module, a rotating speed conversion and summation module, a rotating speed comparison algorithm module and a rotating speed set point module.
On the basis of the scheme, the specific flow of the rotating speed set point control algorithm is as follows:
the resonance frequency point is transmitted to a resonance rotating speed calculation module, the resonance rotating speed calculation module carries out unit conversion processing on the resonance frequency point, and the calculated result is transmitted to a rotating speed comparison algorithm module;
the rotating speeds of the front impeller and the rear impeller are transmitted to a rotating speed conversion summing module, the rotating speed conversion summing module adopts different rotating speed conversion summing formulas according to different ranges of resonance frequency points, and if the resonance frequency points are in a frequency range of P1+ P2, the rotating speed conversion summing formula is the sum of the rotating speed of the front impeller and the rotating speed of the rear impeller; if the resonance frequency point is in the frequency range of n1 × P1+ n2 × P2, the rotation speed conversion summation formula is = n1 × front impeller rotation speed + n2 × rear impeller rotation speed, where P1 is the frequency multiplication range of the front impeller 1, P2 is the frequency multiplication range of the rear impeller 1, n1 is the number of front impeller blades, n2 is the number of rear impeller blades,
the rotating speed conversion and summation module transmits the output value to the rotating speed comparison algorithm module; if the output value of the rotating speed conversion and summation module is within 10 percent of the range of the resonance frequency point, the rotating speed comparison algorithm module outputs true, otherwise, false; wherein 10% is adjusted according to actual conditions.
On the basis of the scheme, the specific flow of solving the rotating speed set point module is as follows:
a. if the output of the rotating speed comparison algorithm module is false, the rotating speed set point of the front impeller and the rotating speed set point of the rear impeller are unchanged;
b. if the output of the rotating speed comparison algorithm module is true and the absolute value of the derivative (or the change rate) of the output value of the rotating speed conversion summation module exceeds a set value (determined by the double-impeller wind generating set), the rotating speed set point of the front impeller and the rotating speed set point of the rear impeller are unchanged;
c. if the output of the rotating speed comparison algorithm module is true, the absolute value of the derivative (or the change rate) of the output value of the rotating speed conversion summation module is smaller than a set value, and the derivatives of the rotating speed of the front impeller and the rotating speed of the rear impeller are both larger than 0, the minimum set value of the rotating speed of the front impeller is the rotating speed value of m1% increase of the rotating speed of the current impeller, and the minimum set value of the rotating speed of the rear impeller is the rotating speed value of m2% increase of the rotating speed of the current impeller;
d. if the output of the rotating speed comparison algorithm module is true, the absolute value of the derivative (or the change rate) of the output value of the rotating speed conversion summation module is smaller than a set value, and the derivatives of the rotating speed of the front impeller and the rotating speed of the rear impeller are both smaller than 0, the maximum set value of the rotating speed of the front impeller is the rotating speed value of the current rotating speed reduction m1%, and the maximum set value of the rotating speed of the rear impeller is the rotating speed value of the current rotating speed reduction m 2%;
e. if the output of the rotating speed comparison algorithm module is true, the absolute value of the derivative (or the change rate) of the output value of the rotating speed conversion summation module is smaller than a set value, and the derivatives of the rotating speed of the front impeller and the rotating speed of the rear impeller have the conditions that one is smaller than 0 and the other is larger than 0, the maximum set value of the rotating speed of the front impeller is the rotating speed value of the current rotating speed of the impeller reduced by m1%, and the maximum set value of the rotating speed of the rear impeller is the rotating speed value of the current rotating speed of the impeller reduced by m 2%;
f. after the maximum set value and the minimum set value of the rotating speed of the front impeller and the rotating speed of the rear impeller are changed, the original values are restored after a certain time, wherein the certain time can be 30 seconds;
g. the resonance frequency points are in different ranges, and the set value variation is different: if the resonance frequency point is in the range of P1+ P2, the minimum set value of the rotation speed of the front impeller described by c, d and e is (1 + m1%) of the rotation speed of the front impeller, the minimum set value of the rotation speed of the rear impeller is (1 + m2%) of the rotation speed of the rear impeller, the maximum set value of the rotation speed of the front impeller is (1-m 1%) of the rotation speed of the front impeller, the maximum set value of the rotation speed of the rear impeller is (1-m 2%) of the rotation speed of the rear impeller, if the resonance frequency point is in the frequency range of n 1+ P1+ n 2P 2, the minimum set value of the rotation speed of the front impeller described by c, d and e is (1 m1%/n 1%) of the rotation speed of the front impeller, the minimum set value of the rotation speed of the rear impeller is (1-m 2%/n 2%) of the rotation speed of the rear impeller, the maximum set value of the rotation speed of the front impeller is (1-m 1%/n 1)% of the rotation speed of the front impeller, and the maximum set value of the rotation speed of the rear impeller is (1-m 2%)/n 2); m1+ m2=10, wherein 10 can be adjusted according to the actual situation.
The invention can realize the resonance crossing of the tandem type reverse rotation double-impeller wind generating set and provides a technical basis for the operation stability of the double-impeller wind generating set.
Drawings
The invention has the following drawings:
FIG. 1 is a schematic diagram of a front wheel speed frequency characteristic.
FIG. 2 is a schematic diagram of a rear impeller speed frequency characteristic.
FIG. 3 is a schematic diagram of superimposed rotation speed and frequency characteristics of front and rear impellers.
FIG. 4 is a control system block diagram.
FIG. 5 is a block diagram of a rotational speed set point control algorithm.
Detailed Description
The present invention is described in further detail below with reference to figures 1-5.
The invention provides a resonance crossing method of a series-type counter-rotating double-impeller wind generating set, and the related wind generating set comprises the following steps:
wind front and rear turbines, i.e. front and rear impellers;
a tower;
related equipment such as a transmission chain system, a power generation system, a yaw system, a brake system and the like;
the sensor system comprises a wind speed and direction measuring device, a generator rotating speed front impeller sensor, a generator rotating speed rear impeller sensor, a generator power front impeller sensor, a generator power rear impeller sensor, a generator torque measuring front impeller device, a generator torque measuring rear impeller device and the like;
the control system comprises an input/output module, a controller, a communication interface module, a communication bus and other control related equipment.
The wind generating set is a series-type reverse rotation double-impeller wind generating set. The rotation speed frequency characteristics of the front impeller and the rear impeller are shown in fig. 1 and fig. 2, wherein P1 is the frequency doubling range of the front impeller 1, n1 is the number of blades of the front impeller, P2 is the frequency doubling range of the rear impeller 1, and n2 is the number of blades of the rear impeller. The two impellers rotate in opposite directions, and the whole frequency range is wider due to different rotating speeds of the front impeller and the rear impeller. The frequency doubling of 1 of the front and rear impellers will superpose the rotational speed frequency range of P1+ P2, and at the same time, the mutual passing of the front and rear impeller blades through the rotational speed frequency range n1 × P1+ n2 × P2 will appear, as shown in fig. 3. The superimposed frequency range may cause resonance at a frequency point where resonance did not occur.
The invention provides a resonance crossing method of a series-type reverse rotation double-impeller wind generating set for solving the problems. The specific implementation is shown in fig. 4. The control system collects information such as the rotating speed of the two impellers, the wind speed and the wind direction of the unit, the torque, the power generated by the two impellers, the angle position of the blades and the like. The resonance frequency point is preset, the rotating speed set points of the front impeller and the rear impeller are calculated through a rotating speed set point control algorithm, and then the rotating speed set points of the front impeller and the rear impeller are transmitted to the front impeller and the rear impeller control modules.
The implementation of the speed set point control algorithm is shown in fig. 5, and the front impeller control module and the rear impeller control module are not in the invention and will not be described in detail.
The resonance frequency point is transmitted to a resonance rotating speed calculation module, the resonance rotating speed calculation module carries out unit conversion processing on the resonance frequency point, and the calculated result is transmitted to a rotating speed comparison algorithm module, namely the conversion from unit Hz to rad/s or RPM.
And the rotating speed of the front impeller and the rotating speed of the rear impeller are transmitted to a rotating speed conversion and summation module, and the rotating speed conversion and summation module adopts different rotating speed conversion and summation formulas according to different ranges of resonance frequency points. If the frequency is in the frequency range of P1+ P2, the rotating speed conversion summation formula is the sum of the rotating speed of the front impeller and the rotating speed of the rear impeller; if the frequency range is within n1 × P1+ n2 × P2, the rotation speed conversion and summation formula is = n1 × front impeller rotation speed + n2 × rear impeller rotation speed, and the rotation speed conversion and summation module transmits the output value to the rotation speed comparison algorithm module. And if the output value of the rotating speed conversion and summation module is within 10 percent of the range of the resonance frequency point, the rotating speed comparison algorithm module outputs true, otherwise, false. Wherein 10% can be adjusted according to actual conditions.
The specific algorithm for solving the rotating speed set point module is as follows:
a. if the output of the rotating speed comparison algorithm module is false, the rotating speed set point of the front impeller and the rotating speed set point of the rear impeller are unchanged;
b. if the output of the rotating speed comparison algorithm module is true and the absolute value of the derivative (or the change rate) of the output value of the rotating speed conversion summation module exceeds a set value, the rotating speed set point of the front impeller and the rotating speed set point of the rear impeller are unchanged;
c. if the output of the rotating speed comparison algorithm module is true, the absolute value of the derivative (or the change rate) of the output value of the rotating speed conversion summation module is smaller than a set value, and the derivatives of the rotating speed of the front impeller and the rotating speed of the rear impeller are both larger than 0, the minimum set value of the rotating speed of the front impeller is the rotating speed value of m1% increase of the rotating speed of the current impeller, and the minimum set value of the rotating speed of the rear impeller is the rotating speed value of m2% increase of the rotating speed of the current impeller;
d. if the output of the rotating speed comparison algorithm module is true, the absolute value of the derivative (or the change rate) of the output value of the rotating speed conversion summation module is smaller than a set value, and the derivatives of the rotating speed of the front impeller and the rotating speed of the rear impeller are both smaller than 0, the maximum set value of the rotating speed of the front impeller is the rotating speed value of the current rotating speed reduction of the impeller by m1%, and the maximum set value of the rotating speed of the rear impeller is the rotating speed value of the current rotating speed reduction of the impeller by m 2%;
e. if the output of the rotating speed comparison algorithm module is true, the absolute value of the derivative (or the change rate) of the output value of the rotating speed conversion summation module is smaller than a set value, and the derivatives of the rotating speed of the front impeller and the rotating speed of the rear impeller have the conditions that one is smaller than 0 and the other is larger than 0, the maximum set value of the rotating speed of the front impeller is the rotating speed value of the current rotating speed of the impeller reduced by m1%, and the maximum set value of the rotating speed of the rear impeller is the rotating speed value of the current rotating speed of the impeller reduced by m 2%;
f. and after the maximum set value and the minimum set value of the front impeller rotating speed and the rear impeller rotating speed are changed, the original values are recovered after a certain time is maintained, wherein the certain time can be 30 seconds.
g. The resonance frequency points are in different ranges, and the set value variation is different. If the range of the resonance frequency point is in P1+ P2, as described in c, d, e, the minimum set value of the front impeller rotation speed is (1 + m 1%) + the front impeller rotation speed, the minimum set value of the rear impeller rotation speed is (1 + m 2%) + the rear impeller rotation speed, the maximum set value of the front impeller rotation speed is (1-m 1%) + the front impeller rotation speed, the maximum set value of the rear impeller rotation speed is (1-m 2%) + the rear impeller rotation speed, if the resonance frequency point is in the frequency range of n 1+ P1+ n 2P 2, the minimum set value of the front impeller rotation speed described in c, d, e is (1-m 1%/n 1%) + the front impeller rotation speed, the minimum set value of the rear impeller rotation speed is (1-m 2%/n 2%) + the rear impeller rotation speed, the maximum set value of the front impeller rotation speed is (1-m 1%/n 1%) + the front impeller rotation speed, and the maximum set value of the rear impeller rotation speed is (1-m 2%) + the rear impeller rotation speed, 2%) + the front impeller rotation speed is 2 +/n 2. m1+ m2=10, wherein 10 can be adjusted according to actual conditions.
Those not described in detail in this specification are well within the skill of the art.
Claims (3)
1. A resonance crossing method of a series-type counter-rotating double-impeller wind generating set is characterized by comprising the following steps:
s1, a control system collects wind speed and direction, rotating speed, torque, power and blade angle information of a front impeller and a rear impeller;
s2, the control system sets a resonance frequency point in advance, calculates the rotating speed set points of the front impeller and the rear impeller through a rotating speed set point control algorithm by combining the collected information of the front impeller and the collected information of the rear impeller, then transmits the rotating speed set points of the front impeller to the front impeller control module, and transmits the rotating speed set points of the rear impeller to the rear impeller control module;
wherein the rotation speed set point control algorithm comprises: the device comprises a resonance rotating speed calculation module, a rotating speed conversion and summation module, a rotating speed comparison algorithm module and a rotating speed set point module;
the specific flow of the rotating speed set point control algorithm is as follows:
the resonance frequency point is transmitted to a resonance rotating speed calculation module, the resonance rotating speed calculation module carries out unit conversion processing on the resonance frequency point, and the calculated result is transmitted to a rotating speed comparison algorithm module;
the rotating speeds of the front impeller and the rear impeller are transmitted to a rotating speed conversion summing module, the rotating speed conversion summing module adopts different rotating speed conversion summing formulas according to different ranges of resonance frequency points, and if the resonance frequency points are in a frequency range of P1+ P2, the rotating speed conversion summing formula is the sum of the rotating speed of the front impeller and the rotating speed of the rear impeller; if the resonance frequency point is in the frequency range of n1 × P1+ n2 × P2, the rotation speed conversion summation formula is = n1 × front impeller rotation speed + n2 × rear impeller rotation speed, where P1 is the frequency multiplication range of the front impeller 1, P2 is the frequency multiplication range of the rear impeller 1, n1 is the number of front impeller blades, n2 is the number of rear impeller blades,
the rotating speed conversion and summation module transmits the output value to the rotating speed comparison algorithm module; if the output value of the rotating speed conversion and summation module is within 10 percent of the range of the resonance frequency point, the rotating speed comparison algorithm module outputs true, otherwise, false; wherein 10% is adjusted according to actual conditions.
2. The method for resonance ride-through of a series type counter-rotating twin-impeller wind generating set according to claim 1, wherein the specific flow of solving the rotating speed set point module is as follows:
a. if the output of the rotating speed comparison algorithm module is false, the rotating speed set point of the front impeller and the rotating speed set point of the rear impeller are unchanged;
b. if the output of the rotating speed comparison algorithm module is true and the absolute value of the derivative of the output value of the rotating speed conversion summation module exceeds a set value, the rotating speed set point of the front impeller and the rotating speed set point of the rear impeller are unchanged;
c. if the output of the rotating speed comparison algorithm module is true, the absolute value of the derivative of the output value of the rotating speed conversion summation module is smaller than a set value, and the derivatives of the rotating speed of the front impeller and the rotating speed of the rear impeller are both larger than 0, the minimum set value of the rotating speed of the front impeller is the rotating speed value of m1% increase of the rotating speed of the current impeller, and the minimum set value of the rotating speed of the rear impeller is the rotating speed value of m2% increase of the rotating speed of the current impeller;
d. if the output of the rotating speed comparison algorithm module is true, the absolute value of the derivative of the output value of the rotating speed conversion summation module is smaller than a set value, and the derivatives of the rotating speed of the front impeller and the rotating speed of the rear impeller are both smaller than 0, the maximum set value of the rotating speed of the front impeller is the rotating speed value of m1% reduction of the rotating speed of the current impeller, and the maximum set value of the rotating speed of the rear impeller is the rotating speed value of m2% reduction of the rotating speed of the current impeller;
e. if the output of the rotating speed comparison algorithm module is true, the absolute value of the derivative of the output value of the rotating speed conversion summation module is smaller than a set value, and the derivatives of the rotating speed of the front impeller and the rotating speed of the rear impeller have the conditions that one is smaller than 0 and the other is larger than 0, the maximum set value of the rotating speed of the front impeller is the rotating speed value of m1% reduction of the rotating speed of the current impeller, and the maximum set value of the rotating speed of the rear impeller is the rotating speed value of m2% reduction of the rotating speed of the current impeller;
f. after the maximum set value and the minimum set value of the rotating speed of the front impeller and the rotating speed of the rear impeller are changed, the original values are recovered after the maximum set value and the minimum set value are maintained for a certain time;
g. the resonance frequency points are in different ranges, and the set value variation is different: if the resonance frequency point is in the range of P1+ P2, the minimum set value of the rotation speed of the front impeller described by c, d and e is (1 + m1%) of the rotation speed of the front impeller, the minimum set value of the rotation speed of the rear impeller is (1 + m2%) of the rotation speed of the rear impeller, the maximum set value of the rotation speed of the front impeller is (1-m 1%) of the rotation speed of the front impeller, the maximum set value of the rotation speed of the rear impeller is (1-m 2%) of the rotation speed of the rear impeller, if the resonance frequency point is in the frequency range of n 1P 1+ n 2P 2, the minimum set value of the rotation speed of the front impeller described by c, d and e is (1 m1%/n 1%) of the rotation speed of the front impeller, the minimum set value of the rotation speed of the rear impeller is (1 m2%/n 2%) of the rotation speed of the rear impeller, the maximum set value of the rotation speed of the front impeller is (1-m 1%/n 1)% of the rotation speed of the front impeller, and the maximum set value of the rotation speed of the rear impeller is (1-m 2)% of the rotation speed of the rear impeller; m1+ m2=10, wherein 10 can be adjusted according to actual conditions.
3. The method of resonance ride-through of a tandem counter-rotating twin-impeller wind turbine generator set of claim 2, wherein the set point is determined by the twin-impeller wind turbine generator set.
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| CN103187912A (en) * | 2011-12-29 | 2013-07-03 | 中国科学院沈阳自动化研究所 | Wind driven generator torque control method for passing through resonance band quickly |
| CN112664390A (en) * | 2020-12-22 | 2021-04-16 | 中国华能集团清洁能源技术研究院有限公司 | Four-level hierarchical control method for tandem type double-wind-wheel wind turbine generator |
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