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首页> 外文期刊>International Journal on Hydropower & Dams >Modern tools and practices for large hydro generator design
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Modern tools and practices for large hydro generator design

机译：大型水轮发电机设计的现代工具和实践

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In the design process of large electrical machines, numerous tradeoffs between conflicting requirements are involved. Modern computer tools and clear design practices are therefore paramount in achieving competitive robust designs. Some examples of modern design tools, developed by GE Hydro, to allow engineers to explore a large number of design possibilities in a short time, are described here. For more accurate prediction of electromagnetic parameters, some advanced electromagnetic analysis software tools have been developed. Automatic finite element mesh generators for both integral and fractional slot machines have been developed to model single and multiple pole pitches for electromagnetic field solutions. The geometry and mesh density are modelled for the desired analysis application using the design parameters obtained by the new process. Both steady-state and transient electromagnetic field problems with balanced and unbalanced loads have been solved, using time-stepping formulations with actual winding topology, load conditions and kinematic equations of rotor motion [Karmaker and Weeber, 1997; Weeber, 1998 and 1997; Tsukerman et al, 1994; Karmaker, 2003; Merkhouf et al, 2003; Merkhouf 2002]. Recently, a permeance model has been developed by using combined analytical and magneto-static finite element solutions with a one pole pitch model [Karmaker, 2002; Knight, Karmaker and Weeber, 2001]. The method has been applied to large hydro generators with fractional slot stator windings. This new method makes the computational algorithm very fast compared with time-stepping solutions. This analysis tool has also proved to be very powerful in analysing the sources of vibration frequencies and mode shapes, and in the negative sequence heating studies.
机译：在大型电机的设计过程中，在相互矛盾的需求之间进行了许多权衡。因此，现代计算机工具和清晰的设计实践对于实现具有竞争力的强大设计至关重要。本文介绍了GE Hydro开发的一些现代设计工具示例，这些示例使工程师能够在短时间内探索大量设计可能性。为了更准确地预测电磁参数，已经开发了一些先进的电磁分析软件工具。已经开发了用于积分和分数老虎机的自动有限元网格生成器，以对电磁场解决方案的单极和多极间距建模。使用通过新过程获得的设计参数，为所需的分析应用程序建模几何形状和网格密度。使用具有实际绕组拓扑，负载条件和转子运动学运动方程的时间步公式，已经解决了平衡负载和不平衡负载的稳态和瞬变电磁场问题[Karmaker and Weeber，1997; Weeber，1998年和1997年； Tsukerman等，1994； Karmaker，2003； Merkhouf等，2003； Merkhouf 2002]。最近，磁导率模型已经通过结合分析和静磁有限元解决方案以及单极节距模型来开发[Karmaker，2002; Knight，Karmaker和Weeber，2001年]。该方法已应用于带有分槽定子绕组的大型水轮发电机。与时间步解决方案相比，这种新方法使计算算法非常快。该分析工具还被证明在分析振动频率和振型的来源以及负序加热研究中非常强大。

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