CN101832233B - Method for regulating power of direct-drive permanent-magnet synchronous wind generator set - Google Patents

Method for regulating power of direct-drive permanent-magnet synchronous wind generator set Download PDF

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Publication number
CN101832233B
CN101832233B CN 201010146806 CN201010146806A CN101832233B CN 101832233 B CN101832233 B CN 101832233B CN 201010146806 CN201010146806 CN 201010146806 CN 201010146806 A CN201010146806 A CN 201010146806A CN 101832233 B CN101832233 B CN 101832233B
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CN
China
Prior art keywords
generator
torque
wind
speed
power
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CN 201010146806
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Chinese (zh)
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CN101832233A (en
Inventor
杨君
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广西银河风力发电有限公司
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Priority to CN 201010146806 priority Critical patent/CN101832233B/en
Publication of CN101832233A publication Critical patent/CN101832233A/en
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P9/00Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • H02P9/48Arrangements for obtaining a constant output value at varying speed of the generator, e.g. on vehicle
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P9/00Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • H02P9/04Control effected upon non-electric prime mover and dependent upon electric output value of the generator
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P2101/00Special adaptation of control arrangements for generators
    • H02P2101/15Special adaptation of control arrangements for generators for wind-driven turbines

Abstract

The invention relates to a method for regulating power of a direct-drive permanent-magnet synchronous wind generator set, which comprises the following steps of: A. acquiring the actual speed n of the generator; B. when n is less than the rated speed, executing step C, else, executing step D; C. computing the current torque given value M of the generator set, wherein when M is not greater than the rated torque, outputting M to the wind generator set, else, assigning M to the rated torque value and outputting M; D. acquiring the last M, wherein when M is smaller than the rated torque, executing step E, and when M reaches the rated torque, executing step F; E. gradually regulating the torque to the rated torque, and keeping the rotation speed at the rated speed; and F. regulating the generator set at the rated speed by using a pitch control system. The invention takes the actual air density of the wind field into account, introduces the optimal power regulation coefficient, simplifies the implementation procedure, conforms to the actual working conditions and realizes the real-time optimum efficiency of the power regulation for the wind generator set in the whole process, thereby overcoming the insufficiencies in the prior regulation method.

Description

A kind of method for regulating power of direct-drive permanent-magnet synchronous wind generator set

Technical field

The present invention relates to a kind of direct-drive permanent magnet synchronous aerogenerator group system, particularly relate to a kind of method for regulating power of direct-drive permanent-magnet synchronous wind generator set.

Background technique

It is very crucial in a whole wind turbine control system link that power of direct-drive permanent-magnet synchronous wind generator set is regulated, and directly affects machine performance and efficient.The power adjustments of existing direct-drive permanent magnet synchronous aerogenerator group; Usually adopt the control mode of Direct Torque; Its realization mainly is the power curve that provides according to wind power generating set complete system plant; Process form, carry out linear interpolation through form again and calculate actual torque setting value and be delivered to generator set, its shortcoming is that programming code is more; The torque setting value that calculates according to linear interpolation is not actual optimized parameter, but realizes the real-time optimum efficiency of overall process of Generation Control and power adjustments.

This shows that above-mentioned existing method for regulating power of direct-drive permanent-magnet synchronous wind generator set obviously still has inconvenience and defective, and demands urgently further improving in method and use.How to found a kind of more simplification, meet actual conditions, realize the new method for regulating power of direct-drive permanent-magnet synchronous wind generator set of the real-time optimum efficiency of overall process of wind power generating set and power adjustments, real one of the current important subject that belongs to.

Summary of the invention

The technical problem that the present invention will solve provides a kind of method for regulating power of direct-drive permanent-magnet synchronous wind generator set; It is more simplified; Meet actual conditions, realize the real-time optimum efficiency of overall process of wind power generating set and power adjustments, thereby improve the deficiency of existing regulating method.

For solving the problems of the technologies described above, a kind of method for regulating power of direct-drive permanent-magnet synchronous wind generator set of the present invention may further comprise the steps the actual speed n that A. obtains generator; B. relatively n and rated speed are as n execution in step C during less than rated speed, execution in step D when n is not less than rated speed; C. the current torque setting value M of calculating generator group when M is not more than nominal torque, exports M to wind power generating set, exports otherwise give M with the nominal torque value again; D. obtain last torque setting value M, relatively M and nominal torque are as M execution in step E during less than nominal torque, execution in step F when M arrives nominal torque; E. progressively regulate torque to nominal torque, keep rotating speed in rated speed; F. pass through pitch-controlled system regulator generator group in rated speed.

As a kind of improvement of the present invention, the formula of described step C is M=K Optn 2, wherein, K OptBe the best power accommodation coefficient.

Described K OptObtain through following steps: C1. obtains root diameter R, wind sweeping area A and best tip speed ratio parameter lambda OptWith the best power coefficient C2. obtain wind field air density ρ; C3. basis Try to achieve K Opt, wherein

After adopting such design, the present invention at first takes wind field actual air density into account when regulator generator power, has realized the actual optiumum control of unit; Next introduces power beat setting coefficient, has simplified realization flow, the real-time optimal performance of feasible system; Distinguish different operating conditionss according to the nominal parameter of generator set at last and realized the optimum efficiency of overall process, thereby improved the defective of existing method for regulating power of direct-drive permanent-magnet synchronous wind generator set comprehensively, be suitable for practicality more.

Description of drawings

Above-mentioned only is the general introduction of technological scheme of the present invention, understands technological means of the present invention in order can more to know, below in conjunction with accompanying drawing and embodiment the present invention is done further detailed description.

Fig. 1 is the schematic flow sheet of method for regulating power of direct-drive permanent-magnet synchronous wind generator set of the present invention.

Fig. 2 is the acquisition schematic flow sheet of best power accommodation coefficient of the present invention.

Embodiment

See also shown in Figure 1ly, a kind of method for regulating power of direct-drive permanent-magnet synchronous wind generator set of the present invention mainly comprises six steps of following A-F.

Steps A. when generator normally moves, obtain the actual speed n of generator.

Step B. is n and rated speed relatively, as n execution in step C during less than rated speed, execution in step D when n is not less than rated speed.

The current torque setting value M of step C. calculating generator group, when M was not more than nominal torque, M was to wind power generating set in output, exports otherwise give M with the nominal torque value again.

Wherein, the formula of M can be M=K Optn 2, K OptBe the best power accommodation coefficient.Please cooperate consult shown in Figure 2, K OptCan obtain through following steps:

C1. according to the blade parameter of this type, obtain root diameter R, wind sweeping area A and best tip speed ratio parameter lambda OptWith the best power coefficient

C2. obtain wind field air density ρ.ρ can calculate through formula ; Wherein P is an annual mean pressure; R is Blang's lattice constant 287.05, and T is a mean annual temperature.

C3. basis Try to achieve K Opt, wherein

Wherein, the derivation of two solution formulas is following in the C3 step:

At first; According to also reduction speed ratio and rotating speed, respective relationships; Calculate the best relation of wind speed and rotating speed; Just according to rpm of the n unit of getting wherein; The best relation that draws wind speed and rotating speed is expressed as ν=kn, wherein

Secondly, draw the best relation of torque and rotating speed according to the relation between generator set air horsepower and wind speed, the power factor, promptly according to wind energy and power relation formula And ν=kn, can obtain Therefore the best relation formula of torque and rotating speed is expressed as M=K Optn 2, wherein

Step D. obtains last torque setting value M, and relatively M and nominal torque are as M execution in step E during less than nominal torque, execution in step F when M arrives nominal torque.

Step e. progressively regulate torque to nominal torque, keep rotating speed in rated speed.

Step F. through pitch-controlled system regulator generator group in rated speed.

A kind of method for regulating power of direct-drive permanent-magnet synchronous wind generator set of the present invention; For the synchronous wind-powered electricity generation machine set system of direct-drive permanent-magnetism; When generator set adopts the Direct Torque Control mode; In power adjustment procedure, considered of the influence of wind field actual air density, realized actual optimum performance for wind energy.Simultaneously extrapolate best power accommodation coefficient K according to the tip speed ratio of wind wheel blade and the relation of power factor, wind energy, air horsepower, torque and rotating speed OptThis parameter provides unit torque setting value M through best power accommodation coefficient and generator speed n, judges the real-time status of blower fan, controls wind power generating set as the case may be.The present invention is based on the real-time optimal performance consideration of the efficient that improves whole unit and overall process; Improved the conventional defective of tabling look-up and combining linear interpolation method to cause; Simplified the program realization flow; Guarantee the real-time optimum performance of wind power generating set overall process operation, improved the efficient of wind power generating set.

The above; It only is preferred embodiment of the present invention; Be not that the present invention is done any pro forma restriction, those skilled in the art utilize the technology contents of above-mentioned announcement to make a little simple modification, equivalent variations or modification, all drop in protection scope of the present invention.

Claims (3)

1. method for regulating power of direct-drive permanent-magnet synchronous wind generator set is characterized in that may further comprise the steps:
A. obtain the actual speed n of generator;
B. relatively n and rated speed are as n execution in step C during less than rated speed, execution in step D when n is not less than rated speed;
C. the current torque setting value M of calculating generator group when M is not more than nominal torque, exports M to wind power generating set, exports otherwise give M with the nominal torque value again;
D. obtain last torque setting value M, relatively M and nominal torque are as M execution in step E during less than nominal torque, execution in step F when M arrives nominal torque;
E. progressively regulate torque to nominal torque, keep rotating speed in rated speed;
F. pass through pitch-controlled system regulator generator group in rated speed.
2. a kind of method for regulating power of direct-drive permanent-magnet synchronous wind generator set according to claim 1 is characterized in that the formula of described step C is: M=K Optn 2, wherein, K OptBe the best power accommodation coefficient.
3. a kind of method for regulating power of direct-drive permanent-magnet synchronous wind generator set according to claim 2 is characterized in that described K OptObtain through following steps:
C1. obtain root diameter R, wind sweeping area A and best tip speed ratio parameter lambda OptWith the best power coefficient
C2. obtain wind field air density ρ;
C3. basis Try to achieve K Opt, wherein
CN 201010146806 2010-04-15 2010-04-15 Method for regulating power of direct-drive permanent-magnet synchronous wind generator set CN101832233B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201010146806 CN101832233B (en) 2010-04-15 2010-04-15 Method for regulating power of direct-drive permanent-magnet synchronous wind generator set

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN 201010146806 CN101832233B (en) 2010-04-15 2010-04-15 Method for regulating power of direct-drive permanent-magnet synchronous wind generator set
LU91914A LU91914A1 (en) 2010-04-15 2011-04-11 Method of regulating power of direct drive and permanent magnet synchronous wind powered electricitygenerator unit
PCT/CN2011/000627 WO2011127749A1 (en) 2010-04-15 2011-04-11 Method for regulating power of direct-drive permanent-magnet synchronous wind power generator set

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CN101832233B true CN101832233B (en) 2012-08-29

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Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101832233B (en) * 2010-04-15 2012-08-29 广西银河风力发电有限公司 Method for regulating power of direct-drive permanent-magnet synchronous wind generator set
CN102767473B (en) * 2012-07-31 2015-05-06 国电联合动力技术有限公司 Method, system and device for on-line computation of optimal gain of wind generation set control strategy
CN102797629B (en) * 2012-08-03 2014-05-14 国电联合动力技术有限公司 Wind turbine generator control method, controller and control system of wind turbine generator
CN102797631B (en) * 2012-08-24 2014-05-14 国电联合动力技术有限公司 Method, system and device for carrying out online self-correcting on optimal gain of wind generating set
CN103147916B (en) * 2013-02-19 2015-05-20 广东明阳风电产业集团有限公司 Control method capable of keeping away from natural frequency point of wind power tower
CN103174590B (en) * 2013-04-03 2015-12-02 无锡中秀驱动技术有限公司 The regulating method of medium-sized Wind turbine power governor
US8803352B1 (en) * 2013-05-14 2014-08-12 General Electric Compay Wind turbines and methods for controlling wind turbine loading
CN104329224B (en) * 2014-11-13 2017-02-15 湖南世优电气股份有限公司 Variable-rate pitching system and variable-rate pitching method for direct-drive permanent magnet wind generating set
CN104632523B (en) * 2015-01-20 2017-05-17 三一重型能源装备有限公司 Wind driven generator and control method and device thereof
CN104763584B (en) * 2015-01-30 2017-09-08 中船重工(重庆)海装风电设备有限公司 Generator speed control method and device
CN107956637B (en) * 2016-10-14 2019-07-30 北京金风科创风电设备有限公司 Wind-driven generator method for controlling number of revolution, equipment and system
CN109973298B (en) * 2017-12-27 2020-03-17 新疆金风科技股份有限公司 Control method and device for wind turbine generator power compensation

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CN101660489A (en) * 2009-09-23 2010-03-03 南京盛唐电力控制系统有限公司 Megawatt wind generating set combination control policy

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CN100593641C (en) * 2008-03-21 2010-03-10 清华大学 Inverse system robust control method for pitch-controlled wind power generation system
CN101832233B (en) * 2010-04-15 2012-08-29 广西银河风力发电有限公司 Method for regulating power of direct-drive permanent-magnet synchronous wind generator set

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CN101203674A (en) * 2005-06-21 2008-06-18 再生动力系统股份公司 Method and system for regulation of the rotational speed of a rotor on a wind energy unit
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WO2011127749A1 (en) 2011-10-20
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