中国电机工程学报
中國電機工程學報
중국전궤공정학보
ZHONGGUO DIANJI GONGCHENG XUEBAO
2012年
3期
137-143
,共7页
丁树业%孙兆琼%徐殿国%苗立杰
丁樹業%孫兆瓊%徐殿國%苗立傑
정수업%손조경%서전국%묘립걸
双馈风力发电机%三维温度场%三维流体场%耦合%有限体积法%数值研究
雙饋風力髮電機%三維溫度場%三維流體場%耦閤%有限體積法%數值研究
쌍궤풍력발전궤%삼유온도장%삼유류체장%우합%유한체적법%수치연구
doubly-fed wind generator%3-D temperature field%3-D fluid-flow field%coupling%finite volume method(FVM)%numerical investigation
随着风力发电机容量的增加,电磁负荷不断提高,电机的发热问题成为影响机组性能和经济指标的主要因素之一。为了解决该难题,以一台3MW双馈风力发电机为例,根据流体力学以及传热学理论,结合发电机通风性能以及结构特点,建立了发电机三维流动与传热耦合求解的数学模型与物理模型;并给出基本假设与相应的边界条件,采用有限体积法对三维流体场和温度场控制方程进行耦合计算。最后,对发电机内部的流体流动性能、传热特性以及发电机定转子铁心、定转子绕组以及绝缘的温升分布进行了分析,得到端部气体流动不规律以及二次冷却热能力较强等,为更大容量风力发电机综合物理场的准确计算提供了理论依据。
隨著風力髮電機容量的增加,電磁負荷不斷提高,電機的髮熱問題成為影響機組性能和經濟指標的主要因素之一。為瞭解決該難題,以一檯3MW雙饋風力髮電機為例,根據流體力學以及傳熱學理論,結閤髮電機通風性能以及結構特點,建立瞭髮電機三維流動與傳熱耦閤求解的數學模型與物理模型;併給齣基本假設與相應的邊界條件,採用有限體積法對三維流體場和溫度場控製方程進行耦閤計算。最後,對髮電機內部的流體流動性能、傳熱特性以及髮電機定轉子鐵心、定轉子繞組以及絕緣的溫升分佈進行瞭分析,得到耑部氣體流動不規律以及二次冷卻熱能力較彊等,為更大容量風力髮電機綜閤物理場的準確計算提供瞭理論依據。
수착풍력발전궤용량적증가,전자부하불단제고,전궤적발열문제성위영향궤조성능화경제지표적주요인소지일。위료해결해난제,이일태3MW쌍궤풍력발전궤위례,근거류체역학이급전열학이론,결합발전궤통풍성능이급결구특점,건립료발전궤삼유류동여전열우합구해적수학모형여물리모형;병급출기본가설여상응적변계조건,채용유한체적법대삼유류체장화온도장공제방정진행우합계산。최후,대발전궤내부적류체류동성능、전열특성이급발전궤정전자철심、정전자요조이급절연적온승분포진행료분석,득도단부기체류동불규률이급이차냉각열능력교강등,위경대용량풍력발전궤종합물리장적준학계산제공료이론의거。
With the increase of wind generator capacity and electromagnetic load,heating problem becomes one of the major factors that would affect the performance and economic benefit of generating set.To solve the problem,a 3 MW double-fed wind generator was taken as an example.On the basis of hydromechanics and heat transfer theory,the mathematical and physical model of 3D fluid flow and heat transfer coupled was established according to structure characteristic of generator.The governing equation of fluid-flow and thermal field was calculated coupled using finite volume method by giving fundamental assumptions and corresponding boundary conditions.Finally,the performance of fluid flow,characteristic of heat transfer,and temperature rise distribution of stator and rotor were analyzed in detail.Some useful conclusions were achieved,by which a theory gist for accurate calculation of synthetic physical fields for the larger capacity wind generator is provided.