调相机定子绕组端部瞬态动力响应分析及试验研究
Transient Dynamic Response Analysis and Experiment of Condenser Stator End Winding
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摘要: 以调相机定子绕组端部的汽端结构作为研究对象,考虑汽端实际结构,提出构件的等效模拟方法,建立汽端端部数字化机理的三维模型。 首先采用电磁分析软件JMAG对汽端端部在额定负载下开展数值模拟,明确汽端端部线棒在额定负载作用下的电磁力密度及演变周期,并分析绕组线棒电磁力密度的特征和受力状态;其次运用ANSYS中APDL汇编语言编写数据转换程序将电磁分析的结果数据耦合到结构分析模型中,并对汽端结构开展瞬态动力响应分析;最后研究定子绕组端部随时间和空间分布的动力响应曲线及频谱结构。通过仿真结果和试验结果的对比分析,验证了定子端部磁固耦合瞬态动力响应仿真分析方法的可靠性和准确性,为后期汽轮发电机定子绕组端部结构的优化设计奠定技术基础。Abstract: The turbine end of the condenser stator end winding was taken as a research object in this paper. A three dimensional finite element model of the stator end winding was established. Firstly the periodical variation of electromagnetic force density in the stator end winding underrated load was obtained by numerical simulation with JMAG software. Secondly the electromagnetic analysis results were coupled to the structural model for transient dynamic response analysis by ANSYS software. Finally the dynamic response curve and spectrum structure of the stator end winding with time were obtained. The comparison demonstrates a high level of agreement between the numerical simulation and experimental results which has proved the reliability and accuracy of the simulation analysis method. The conclusion can help to guide the optimization design of the stator end winding structure for the turbine generator.
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