CN102437810A - Variable parameter tracking control method of direct drive permanent magnetic synchronous wind turbine frequency converter controller - Google Patents

Variable parameter tracking control method of direct drive permanent magnetic synchronous wind turbine frequency converter controller Download PDF

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Publication number
CN102437810A
CN102437810A CN2012100026568A CN201210002656A CN102437810A CN 102437810 A CN102437810 A CN 102437810A CN 2012100026568 A CN2012100026568 A CN 2012100026568A CN 201210002656 A CN201210002656 A CN 201210002656A CN 102437810 A CN102437810 A CN 102437810A
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China
Prior art keywords
unit
frequency converter
controller
output characteristic
control
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CN2012100026568A
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Inventor
张仰飞
李海峰
罗建裕
王伟胜
郝思鹏
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Nanjing Institute of Technology
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Nanjing Institute of Technology
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Priority to CN201110163388.3 priority
Application filed by Nanjing Institute of Technology filed Critical Nanjing Institute of Technology
Priority to CN2012100026568A priority patent/CN102437810A/en
Publication of CN102437810A publication Critical patent/CN102437810A/en
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Abstract

The invention discloses a variable parameter tracking control method of a direct drive permanent magnetic synchronous wind turbine frequency converter controller. When in the normal running state, by dynamically tracking input and output of a unit frequency converter and voltage current variation characteristic of a direct current link online, advanced identification algorithm is applied, controller parameters are identified, and parameters of a controller PI (proportional-integral) controlling link are adjusted according to the identification value. When running state of the unit is substantially changed, according to variation degree of unit output characteristic deviating from a target value, the parameters of the controller are identified again online, and control parameters of the controller PI controlling link are immediately optimized and adjusted, thus output characteristic of the frequency converter can accurately track variation of the running state and further track a target set value, and perfect control performance can be achieved.

Description

The synchronous wind-powered electricity generation unit of direct-drive permanent-magnetism frequency converter controller variable element tracking and controlling method
Technical field
The variable element optimal control method of the synchronous wind-powered electricity generation unit of direct-drive permanent-magnetism of the present invention frequency converter controller belongs to wind turbine generator operation control technology field.
Background technology
Wind energy is a kind of inexhaustible, nexhaustible clean energy resource, along with improving constantly of the commercialization degree and the market competitiveness, mainly utilizes the wind power generation of form to become one of current topmost renewable energy technologies as wind energy.Wind power generation is paid much attention to and greatly developed in countries in the world.The leading world of China's wind-powered electricity generation development speed, the newly-increased wind-powered electricity generation installation of China in 2010 reaches 1,600 ten thousand kilowatts, and the accumulative total installed capacity reaches 4182.7 ten thousand kilowatts, increases by 62% on a year-on-year basis, leaps to the first in the world.
Along with the quick growth of wind-powered electricity generation unit installed capacity, People more and more is paid attention to the safe and stable operation and the power benefit of wind-powered electricity generation unit.The synchronous wind-powered electricity generation unit of direct-drive permanent-magnetism has not only reduced failure rate of machinery owing to saved heavy gear case transmission mechanism, has also improved unit generation efficient, thereby has become the development trend of wind-powered electricity generation unit.Because the change at random characteristic of wind speed; The wind-powered electricity generation unit can run on the state of different wind speed; Output characteristic from unit; The size of unit power output depends on that not only generator sends the ability size of power, depends on that also frequency converter sees the ability size of power off; Thereby; Frequency Converter Control is the key technology of wind-powered electricity generation unit operation control, and the quality of its performance is directly connected to the power benefit of unit.
For improving the output characteristic of unit; Improve the fan-out capability of the power of the assembling unit; Wind-powered electricity generation unit Frequency Converter Control strategy has multiple; The Different control strategy, the corresponding design and production Different control device, in general; When dispatching from the factory, the parameter of existing frequency converter controller adjusts; Producer's typical practice is the wind speed range according to the operation of unit normal dynamic, in the particularly big wind speed range, and the parameter of deciding the parameter tuning frequency converter controller.Objectively, this method has certain reasonability, can guarantee that unit power benefit in big wind speed range is best.Its engineering defect is: wind speed has randomness and fast sex change; Wind speed under normal natural conditions all is not big wind speed; To a certain extent, the most of the time is in low wind speed running status, and this makes unit when hanging down the wind speed state, have very poor output characteristic and power benefit.In a word, decide parameter operation control technology, can not realize that output characteristic and the power benefit under the various wind regime of unit is best.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of controller variable element tracking and controlling method of the synchronous wind-powered electricity generation unit of the direct-drive permanent-magnetism frequency converter of in good time, optimizing.This method is utilized the change of the state information that change of wind velocity causes, the target component of immediately identifying unit frequency converter controller is optimized and revised controller parameters setting in good time, realizes the Optimal Control of unit output characteristic and power benefit.
The concrete regulating and controlling process of this method is following:
(1) logical base of the different wind speed section output characteristic of structure unit, differentiation is distinguished the adjusting target of output characteristic;
(2) variable quantity of measuring point measuring wind speed value and preceding measuring point measuring wind speed value is relatively at present confirmed the intensity of variation of the adjusting target of unit output characteristic;
(3) difference between check current output characteristic of unit and the desired value if it is little to depart from amplitude, then keeps the parameter constant of the controller of unit frequency converter, returns for (2) step; If it is big to depart from amplitude, then according to new adjusting target, the target component of immediately identifying controller;
(4) with the target component of identification, in conjunction with controlling models, the output of computer set, according to the degree of conformity of itself and target output characteristic, the performance of test-target parameter is good and bad;
(5), directly, be optimized in good time and adjust, according to the operation of new argument control of conversion device as the parameter of controller the good parameter of check feature;
(6) check the degree of conformity of actual output characteristic and target output characteristic in good time,, then keep this parameter setting,, come back to (2) stepping line parameter identification and optimal tunning again if degree of conformity is bad if degree of conformity is good;
(7) when wind speed changes once more, repeat above-mentioned adjustment process, unit is regulated run on new running status.So unit just can run on optimal operational condition rapidly, continuously, keeps good output characteristics.
This control method is taked instant optimal tunning strategy; Through following the tracks of extraneous wind regime state variation; Change frequency converter output characteristic control target; The target component of in good time identification corresponding controller; The parameter of instant optimal tunning controller; Realize the instant optimization of unit output characteristic, improved the power output of unit under different wind speed states, thereby improved the power benefit of unit.
The advantage of this control method is: on common controlling unit; The in good time identification link of the controller parameter desired value that walked abreast; The step of implementing is clear; Keep independent with the governing loop of other functions of unit; Simple with the interface of frequency converter governing loop; On engineering, be easy to realize, do not influence realization and operation that other functions of unit are regulated.Both can with the parallelly connected switchover operation of unit existing controller, can implant the corresponding link of existing controller again, can realize the optimization of the output characteristic under the direct-drive permanent magnet synchronous aerogenerator group full blast speed running status, significantly improve the power benefit of unit.
Figure of description
Fig. 1 is the control procedure block diagram.
The flow chart that Fig. 2 realizes for control algolithm.
Concrete implementation
As shown in Figure 1, the concrete regulating step of the synchronous wind-powered electricity generation unit of direct-drive permanent-magnetism of the present invention frequency converter variable element tracking and controlling method is following:
The first step: to determine the unit output power ? <img file = "2012100026568100002DEST_PATH_IMAGE002.GIF" he = "25" img-content = "drawing" img-format = "jpg" inline = "no" orientation = "portrait" wi = "18" /> off target power <img file = "2012100026568100002DEST_PATH_IMAGE004.GIF" he = "26" img-content = "drawing" img-format = "jpg" inline = "no" orientation = "portrait " wi =" 40 " /> is over changes limit <img file =" 2012100026568100002DEST_PATH_IMAGE006.GIF " he =" 26 " img-content =" drawing " img-format =" jpg " inline =" no " orientation =" portrait " wi =" 49 " />.If the current wind speed that runs on of unit<img file="2012100026568100002DEST_PATH_IMAGE008.GIF" he="30" img-content="drawing" img-format="GIF" inline="no" orientation="portrait" wi="21" />, power output<img file="2012100026568100002DEST_PATH_IMAGE010.GIF" he="30" img-content="drawing" img-format="GIF" inline="no" orientation="portrait" wi="28" />, back wind speed changes, and becomes<img file="2012100026568100002DEST_PATH_IMAGE012.GIF" he="29" img-content="drawing" img-format="GIF" inline="no" orientation="portrait" wi="18" />, relatively<img file="868633DEST_PATH_IMAGE012.GIF" he="29" img-content="drawing" img-format="GIF" inline="no" orientation="portrait" wi="18" />,<img file="769462DEST_PATH_IMAGE008.GIF" he="30" img-content="drawing" img-format="GIF" inline="no" orientation="portrait" wi="21" />Size, the check difference surpasses wind speed and changes limit value<img file="2012100026568100002DEST_PATH_IMAGE014.GIF" he="26" img-content="drawing" img-format="GIF" inline="no" orientation="portrait" wi="36" />If,<img file="2012100026568100002DEST_PATH_IMAGE016.GIF" he="33" img-content="drawing" img-format="GIF" inline="no" orientation="portrait" wi="106" ><img file="752462DEST_PATH_IMAGE014.GIF" he="26" img-content="drawing" img-format="GIF" inline="no" orientation="portrait" wi="36" /><b >,</b>Then changeed for second step.If <img file = "882092DEST_PATH_IMAGE016.GIF" he = "33" img-content = "drawing" img-format = "jpg" inline = "no" orientation = "portrait" wi = "106" /> <img file = "2012100026568100002DEST_PATH_IMAGE018.GIF" he = "14" img-content = "drawing" img-format = "jpg" inline = "no" orientation = "portrait" wi = "14" /> <img file = "165306DEST_PATH_IMAGE014.GIF" he = "26" img-content = "drawing" img-format = "jpg" inline = "no" orientation = "portrait" wi = "36" /> directly to the sixth step.
Step Two: The output from a different wind power curve library, select the corresponding output power adjustment target value ;
The third step: , combined with the measured frequency of the two sets of three-phase input voltage and current , , , , , , , , , , , , and the output voltage and current , , , , , , and the DC link voltage , the input current output current other parameter values, identification calculate controller ideal , , , ...... and other control parameters;
The fourth step: to identify the , , , ...... and other control parameters, with the drive and control of the model equation to calculate the output characteristics of the model, testing to calculate the output characteristics and conformity of the actual output characteristic, if found good, the Rotary fifth step, if conformity is not good, then go to the third step;
Step Five: Follow , , , ...... and other control parameters, directly optimizing the inverter controller tuning parameters, in accordance with the control parameters to control adjusts the frequency;
The 6th step: keep the parameter of the controller of frequency converter, make frequency converter run on good output characteristic state;
The 7th step: continue the actual output characteristic and the wind speed characteristics of Measurement for Inverter, so repeat above-mentioned adjustment process, make frequency converter run on good output characteristic state all the time.
The step procedure frame that algorithm is implemented as shown in Figure 2.

Claims (2)

1. the synchronous wind-powered electricity generation unit of direct-drive permanent-magnetism frequency converter controller variable element tracking and controlling method; It is characterized in that: when wind speed changes; Difference according to unit typicalness controlled target; Confirm the optimal control target of unit output characteristic in good time; According to this new controlled target; The Control Parameter of on-line identification controller, directly adjusting changes the parameter of unit frequency converter controller, and the output characteristic of unit is optimized in good time.
2. the synchronous wind-powered electricity generation unit of direct-drive permanent-magnetism frequency converter variable element optimal control method, its regulating and controlling process is following:
When (1) wind speed changes,, judge that operating states of the units changes degree according to wind speed change direction and amplitude of variation;
(2) according to the change of operating states of the units, corresponding adjustment unit output characteristic goal-setting value, by this set point, the target component of identification unit frequency converter controller;
(3) according to target component, the Control Parameter of in good time direct optimal tunning unit frequency converter;
(4) when operating states of the units changes once more, repeat above-mentioned adjustment process, make unit regulate the state of a control that runs on new optimization; So unit just can be in good time, optimally move.
CN2012100026568A 2011-06-17 2012-01-06 Variable parameter tracking control method of direct drive permanent magnetic synchronous wind turbine frequency converter controller Pending CN102437810A (en)

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CN201110163388 2011-06-17
CN201110163388.3 2011-06-17
CN2012100026568A CN102437810A (en) 2011-06-17 2012-01-06 Variable parameter tracking control method of direct drive permanent magnetic synchronous wind turbine frequency converter controller

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Application Number Priority Date Filing Date Title
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1960159A (en) * 2006-11-07 2007-05-09 合肥工业大学 Control method for tracking maximum power point of wind electric power generation
CN101592126A (en) * 2009-05-15 2009-12-02 南京工程学院 The wind energy capture of directly driven permanent magnet synchronous wind generating set tracking and controlling method
CN101639038A (en) * 2009-08-14 2010-02-03 江南大学 FPGA-based maximum power tracking controller of wind power system
CN201705553U (en) * 2010-06-17 2011-01-12 沈阳瑞祥风能设备有限公司 Intelligent variable propeller pitch control system for megawatt wind generating set

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1960159A (en) * 2006-11-07 2007-05-09 合肥工业大学 Control method for tracking maximum power point of wind electric power generation
CN101592126A (en) * 2009-05-15 2009-12-02 南京工程学院 The wind energy capture of directly driven permanent magnet synchronous wind generating set tracking and controlling method
CN101639038A (en) * 2009-08-14 2010-02-03 江南大学 FPGA-based maximum power tracking controller of wind power system
CN201705553U (en) * 2010-06-17 2011-01-12 沈阳瑞祥风能设备有限公司 Intelligent variable propeller pitch control system for megawatt wind generating set

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