CN103345582A - Fixed pitch asynchronous wind turbine modeling method - Google Patents
Fixed pitch asynchronous wind turbine modeling method Download PDFInfo
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- CN103345582A CN103345582A CN2013102877831A CN201310287783A CN103345582A CN 103345582 A CN103345582 A CN 103345582A CN 2013102877831 A CN2013102877831 A CN 2013102877831A CN 201310287783 A CN201310287783 A CN 201310287783A CN 103345582 A CN103345582 A CN 103345582A
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Abstract
The invention discloses a fixed pitch asynchronous wind turbine modeling method which comprises the following steps that firstly, a wind turbine generator capture power equation is established; secondly, a wind speed change dynamic process equation is established; thirdly, power conversion characteristics of a wind turbine generator are fitted; fourthly, a wind energy transfer process time lag equation is established; fifthly, the wind turbine generator capture power equation, the wind speed change dynamic process equation, the power conversion characteristics of the wind turbine generator and the wind energy transfer process time lag equation are utilized to complete fixed pitch asynchronous wind turbine modeling. The fixed pitch asynchronous wind turbine modeling is achieved, and the advantages of providing accurate data for stable analysis of a power system and power grid production dispatching are achieved.
Description
Technical field
The present invention relates to wind-force discharge field, particularly, relate to the asynchronous wind energy conversion system modeling method of a kind of fixed pitch.
Background technology
China's wind-powered electricity generation enters the large-scale wind electricity base majority that large-scale development produces after the stage and is positioned at " three northern areas of China " (northwest, northeast, North China); the large-scale wind electricity base is generally away from load center, and its electric power need be transported to load center and dissolve through long distance, high voltage.Because intermittence, randomness and the undulatory property of wind-resources, cause the wind-powered electricity generation in large-scale wind power base to be exerted oneself can taking place fluctuation in a big way thereupon, further cause the fluctuation of power transmission network charge power, bring a series of problems to safe operation of electric network.
Therefore, need carry out modeling to wind energy conversion system, thereby can set up wind-powered electricity generation unit and wind energy turbine set model, and the model parameter of wind-powered electricity generation unit and wind energy turbine set verified, for power system stability analysis and electrical network production scheduling provide basis accurately, for the exploitation of wind-powered electricity generation unit and wind farm grid-connected access or operation control new technology provides basic data.But the modeling method that does not also have the asynchronous wind energy conversion system model of fixed pitch can provide the asynchronous wind energy conversion system model of a kind of fixed pitch for providing the data basis for power system stability analysis and electrical network production scheduling.
Summary of the invention
The objective of the invention is to, at the problems referred to above, propose the asynchronous wind energy conversion system modeling method of a kind of fixed pitch, realizing setting up the asynchronous wind energy conversion system model of fixed pitch, provide the advantage of accurate data for power system stability analysis and electrical network production scheduling.
For achieving the above object, the technical solution used in the present invention is:
The asynchronous wind energy conversion system modeling method of a kind of fixed pitch may further comprise the steps:
Step 1: set up the wind-powered electricity generation unit and capture power equation, formula is specific as follows:
Wherein,
P w Be wind energy power,
ρBe atmospheric density,
A r Be the inswept area of blade,
V w Be wind speed,
C p Be the wind energy conversion system power coefficient,
λ isThe wind energy conversion system tip speed ratio,
θ isThe wind energy conversion system propeller pitch angle;
Step 2: set up wind speed change dynamics process equation, formula is specific as follows:
In the formula,
Be the wind energy conversion system output rating,
,
,
Be respectively incision wind speed, cut-out wind speed and the wind rating of wind energy conversion system;
Step 3: the power transfer characteristic of match wind-powered electricity generation unit, above-mentioned function
C P's Computing formula is specific as follows:
In the formula,
a i Be correction factor;
Step 4: set up wind energy transmittance process time lag equation, have a bigger moment of inertia because the blade of blower fan and wheel are firm, wind energy is delivered to the generator acting and has certain time lag from the blade pass third wheel is firm, simulates the time lag equation with first order inertial loop, that is:
In the formula,
P m Be the mechanical output in the asynchronous generator rotating shaft,
τ h Inertia time constant for wheel hub;
Step 5: the power transfer characteristic and the wind energy transmittance process time lag equation that use above-mentioned wind-powered electricity generation unit to capture power equation, wind speed change dynamics process equation, wind-powered electricity generation unit are finished the asynchronous wind energy conversion system modeling of fixed pitch.
Technical scheme of the present invention has following beneficial effect:
Technical scheme of the present invention, capture power transfer characteristic and the wind energy transmittance process time lag equation of power equation, wind speed change dynamics process equation, wind-powered electricity generation unit by setting up the wind-powered electricity generation unit, thereby finished the asynchronous wind energy conversion system modeling of fixed pitch, reached the purpose that accurate data are provided for power system stability analysis and electrical network production scheduling.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 is the asynchronous wind energy conversion system modeling method of the described fixed pitch of embodiment of the invention synoptic diagram;
Fig. 2 is fixed pitch wind-powered electricity generation unit Cp curve map in the asynchronous wind energy conversion system modeling method of the described fixed pitch of the embodiment of the invention;
Fig. 3 is for adopting the comparison diagram of the embodiment of the invention described fixed pitch asynchronous wind energy conversion system modeling method matched curve and actual curve.
Wherein: 1 is actual curve figure, and 2 is the curve map of technical solution of the present invention match.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in restriction the present invention.
As shown in Figure 1, the asynchronous wind energy conversion system modeling method of a kind of fixed pitch may further comprise the steps:
Step 101: set up the wind-powered electricity generation unit and capture power equation, formula is specific as follows:
Wherein,
P w Be wind energy power,
ρBe atmospheric density,
A r Be the inswept area of blade,
V w Be wind speed,
C p Be the wind energy conversion system power coefficient,
λ isThe wind energy conversion system tip speed ratio,
θ isThe wind energy conversion system propeller pitch angle;
Step 102: set up wind speed change dynamics process equation, formula is specific as follows:
In the formula,
Be the wind energy conversion system output rating,
,
,
Be respectively incision wind speed, cut-out wind speed and the wind rating of wind energy conversion system;
Step 103: the power transfer characteristic of match wind-powered electricity generation unit, above-mentioned function
C P's Computing formula is specific as follows:
In the formula,
a i Be correction factor;
Step 104: set up wind energy transmittance process time lag equation, have a bigger moment of inertia because the blade of blower fan and wheel are firm, wind energy is delivered to the generator acting and has certain time lag from the blade pass third wheel is firm, simulates the time lag equation with first order inertial loop, that is:
In the formula,
P m Be the mechanical output in the asynchronous generator rotating shaft,
τ h Inertia time constant for wheel hub;
Step 105: the power transfer characteristic and the wind energy transmittance process time lag equation that use above-mentioned wind-powered electricity generation unit to capture power equation, wind speed change dynamics process equation, wind-powered electricity generation unit are finished the asynchronous wind energy conversion system modeling of fixed pitch.
Wherein in the step 101, the wind energy conversion system power coefficient
C p It is the wind energy conversion system tip speed ratio
λ(ratio of wind wheel tip speed and wind speed) and wind energy conversion system propeller pitch angle
θFunction, fixed pitch wind-powered electricity generation unit propeller pitch angle
θImmobilize, therefore,
C p Only with tip speed ratio
λRelevant, as shown in Figure 2.
Fig. 3 is arranged as can be known in the working range of wind-powered electricity generation unit, technical scheme of the present invention has simulate effect preferably.
It should be noted that at last: the above only is the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment the present invention is had been described in detail, for a person skilled in the art, it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (1)
1. the asynchronous wind energy conversion system modeling method of fixed pitch is characterized in that, may further comprise the steps:
Step 1: set up the wind-powered electricity generation unit and capture power equation, formula is specific as follows:
Wherein,
P w Be wind energy power,
ρBe atmospheric density,
A r Be the inswept area of blade,
V w Be wind speed,
C p Be the wind energy conversion system power coefficient,
λ isThe wind energy conversion system tip speed ratio,
θ isThe wind energy conversion system propeller pitch angle;
Step 2: set up wind speed change dynamics process equation, formula is specific as follows:
In the formula,
Be the wind energy conversion system output rating,
,
,
Be respectively incision wind speed, cut-out wind speed and the wind rating of wind energy conversion system;
Step 3: the power transfer characteristic of match wind-powered electricity generation unit, above-mentioned function
C P's Computing formula is specific as follows:
In the formula,
a i Be correction factor;
Step 4: set up wind energy transmittance process time lag equation, have a bigger moment of inertia because the blade of blower fan and wheel are firm, wind energy is delivered to the generator acting and has certain time lag from the blade pass third wheel is firm, simulates the time lag equation with first order inertial loop, that is:
In the formula,
P m Be the mechanical output in the asynchronous generator rotating shaft,
τ h Inertia time constant for wheel hub;
Step 5: the power transfer characteristic and the wind energy transmittance process time lag equation that use above-mentioned wind-powered electricity generation unit to capture power equation, wind speed change dynamics process equation, wind-powered electricity generation unit are finished the asynchronous wind energy conversion system modeling of fixed pitch.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7679208B1 (en) * | 2008-09-18 | 2010-03-16 | Samsung Heavy Ind. Co., Ltd. | Apparatus and system for pitch angle control of wind turbine |
| CN102034008A (en) * | 2010-12-17 | 2011-04-27 | 苏勋文 | Variable-parameter capacitance compensation equivalent modeling method for wind power station of constant-speed wind power unit at fluctuating air speed |
-
2013
- 2013-07-10 CN CN201310287783.1A patent/CN103345582B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7679208B1 (en) * | 2008-09-18 | 2010-03-16 | Samsung Heavy Ind. Co., Ltd. | Apparatus and system for pitch angle control of wind turbine |
| CN102034008A (en) * | 2010-12-17 | 2011-04-27 | 苏勋文 | Variable-parameter capacitance compensation equivalent modeling method for wind power station of constant-speed wind power unit at fluctuating air speed |
Non-Patent Citations (4)
| Title |
|---|
| 刘博: "基于直流电动机的风力机特性模拟试验平台的研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》, no. 11, 15 November 2009 (2009-11-15) * |
| 王俊琦: "定桨距变速非并网风力发电控制系统的研究与设计", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑 》, no. 11, 15 November 2011 (2011-11-15) * |
| 王瑞雪: "基于PSASP扩展的风力发电系统综合分析程序", 《中国优秀博硕士学位论文全文数据库 (硕士) 工程科技Ⅱ辑》, no. 6, 15 June 2006 (2006-06-15) * |
| 赵杨: "变速恒频风力发电系统的建模和仿真", 《中国优秀博硕士学位论文全文数据库 (硕士)工程科技Ⅱ》, no. 10, 15 October 2006 (2006-10-15) * |
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