新型双定子无刷双馈风力发电机温度场计算与分析
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摘要
针对现有风力发电机功率密度较小,运输成本高,容错性较差等问题,本文提出一种新型笼障转子耦合双定子无刷双馈风力发电机。该种电机内部谐波磁场丰富,损耗较大,导致其在运行时温升较高。然而温升对电机性能具有较大的影响,因此对其准确计算至关重要。本文介绍了该种电机的总体结构,建立传热三维物理模型和数学模型,给定相关基本假设和边界条件,采用有限元方法对温度场进行了仿真计算,得到了各部件温升的分布规律,并对比分析了不同的机壳材料、冷却介质以及流速等条件下双定子无刷双馈发电机温度分布情况。本文为后续该种发电机冷却系统的设计优化提供了依据。
In order to solve the problems of low power density, high transportation cost and poor fault tolerance of the existing wind generator, this paper proposes a new type of cage-barrier rotor coupled double stator brushless doubly-fed wind generator. This kind of generator has rich harmonic magnetic field and large loss, which leads to higher temperature rise during operation. However, the temperature rise has a great influence on various indexes of the generator, so accurate calculation of the temperature rise is crucial. This paper firstly introduces the overall structure of this kind of generator. Then, a three-dimensional physical model and a mathematical model of heat transfer are established. Based on the basic assumptions and boundary conditions, the finite element method(FEM) is utilized to simulate the temperature field and the distribution rules of temperature rise of each component are obtained. Finally, the calculation of the temperature field of the double-stator brushless doubly-fed generator under different casing materials, cooling media, and flow velocity are performed, which provides a theoretical basis for the cooling system design and optimization on this type of generator in the future.
In order to solve the problems of low power density, high transportation cost and poor fault tolerance of the existing wind generator, this paper proposes a new type of cage-barrier rotor coupled double stator brushless doubly-fed wind generator. This kind of generator has rich harmonic magnetic field and large loss, which leads to higher temperature rise during operation. However, the temperature rise has a great influence on various indexes of the generator, so accurate calculation of the temperature rise is crucial. This paper firstly introduces the overall structure of this kind of generator. Then, a three-dimensional physical model and a mathematical model of heat transfer are established. Based on the basic assumptions and boundary conditions, the finite element method(FEM) is utilized to simulate the temperature field and the distribution rules of temperature rise of each component are obtained. Finally, the calculation of the temperature field of the double-stator brushless doubly-fed generator under different casing materials, cooling media, and flow velocity are performed, which provides a theoretical basis for the cooling system design and optimization on this type of generator in the future.
引文
[1]丁树业,葛云中,徐殿国. 1.5MW双馈风力发电机内流体场分析[J].中国电机工程学报, 2012,32(21):93-98.
[2]张凤阁,贾广隆,郑阳,等.无刷电励磁同步电机不同转子结构的对比分析[J].电工技术学报, 2016,31(7):40-49.
[3]杜江,韩力,欧先朋,等.笼型转子无刷双馈电机异步运行模式的实验研究[J].中国电机工程学报,2016, 36(14):3964-3972.
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[6]李翠萍.微型电动汽车用感应电机的冷却系统研究[D].哈尔滨工业大学, 2013.
[7]王晓远,高鹏.等效热网络法和有限元法在轮毂电机温度场计算中的应用[J].电工技术学报,2016,31(16):26-33.
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[10] Marignetti F, Colli V D, Coia Y. Design of Axial Flux PM Synchronous Machines Through 3-D Coupled Electromagnetic Thermal and Fluid-Dynamical Finite-Element Analysis[J]. IEEE Transactions on Industrial Electronics, 2008,55(10):3591-3601.
[11]江善林,邹继斌,徐永向,等.考虑旋转磁通和趋肤效应的变系数铁耗计算模型[J].中国电机工程学报, 2011, 31(3):104-110.
[12] Seo J H, Kwak S Y, Jung S Y, et al. A Research on Iron Loss of IPMSM With a Fractional Number of Slot Per Pole[J]. IEEE Transactions on Magnetics,2009, 45(3):1824-1827.
[13]李伟力,陈婷婷,曲凤波,等.高压永磁同步电动机实心转子三维温度场分析[J].中国电机工程学报, 2011, 31(18):55-60.
[14]谢颖,辜承林.笼型感应电动机三维全域温度场计算[J].中国电机工程学报, 2012, 32(36):96-101.
[15]程树康,李翠萍,柴凤.不同冷却结构的微型电动车用感应电机三维稳态温度场分析[J].中国电机工程学报, 2012, 32(30):82-90.
[2]张凤阁,贾广隆,郑阳,等.无刷电励磁同步电机不同转子结构的对比分析[J].电工技术学报, 2016,31(7):40-49.
[3]杜江,韩力,欧先朋,等.笼型转子无刷双馈电机异步运行模式的实验研究[J].中国电机工程学报,2016, 36(14):3964-3972.
[4]江善林.高速永磁同步电机的损耗分析与温度场计算[D].哈尔滨工业大学, 2010.
[5]程树康,李翠萍,柴凤.不同冷却结构的微型电动车用感应电机三维稳态温度场分析[J].中国电机工程学报, 2012, 32(30):82-90.
[6]李翠萍.微型电动汽车用感应电机的冷却系统研究[D].哈尔滨工业大学, 2013.
[7]王晓远,高鹏.等效热网络法和有限元法在轮毂电机温度场计算中的应用[J].电工技术学报,2016,31(16):26-33.
[8] Duran M J, Fernandez J. Lumped-parameter thermal model for induction machines[J]. IEEE Transactions on Energy Conversion, 2004, 19(4):791-792.
[9]李伟力,李守法,谢颖,等.感应电动机定转子全域温度场数值计算及相关因素敏感性分析[J].中国电机工程学报, 2007, 27(24):85-91.
[10] Marignetti F, Colli V D, Coia Y. Design of Axial Flux PM Synchronous Machines Through 3-D Coupled Electromagnetic Thermal and Fluid-Dynamical Finite-Element Analysis[J]. IEEE Transactions on Industrial Electronics, 2008,55(10):3591-3601.
[11]江善林,邹继斌,徐永向,等.考虑旋转磁通和趋肤效应的变系数铁耗计算模型[J].中国电机工程学报, 2011, 31(3):104-110.
[12] Seo J H, Kwak S Y, Jung S Y, et al. A Research on Iron Loss of IPMSM With a Fractional Number of Slot Per Pole[J]. IEEE Transactions on Magnetics,2009, 45(3):1824-1827.
[13]李伟力,陈婷婷,曲凤波,等.高压永磁同步电动机实心转子三维温度场分析[J].中国电机工程学报, 2011, 31(18):55-60.
[14]谢颖,辜承林.笼型感应电动机三维全域温度场计算[J].中国电机工程学报, 2012, 32(36):96-101.
[15]程树康,李翠萍,柴凤.不同冷却结构的微型电动车用感应电机三维稳态温度场分析[J].中国电机工程学报, 2012, 32(30):82-90.