水电站水机电-结构系统动力耦联模型研究及数值模拟
发布时间：2018-12-16 22:28
【摘要】：建立了包括引水系统、水轮机、调速器、发电机电磁系统、电网、水电机组轴系及厂房耦联结构等子模型在内全新的水电站系统非线性动力耦联模型。基于水力、电机、结构等学科理论构建了涉及水力、机械和电磁等因素的联立微分方程组,并采用有限元法建立机组轴系和厂房结构模型。结合Ansys的二次开发功能提出了水-机-电多因素影响下机组和厂房耦联结构模型不同工况动力特性的研究方法。采用差分法及特征线法等数值计算方法,利用该模型对水电站系统的开机工况进行了数值模拟计算和分析,同时对模型的合理性给予了验证。计算结果表明,该模型可以模拟计算水电站系统的开机工况运行过程,并能够较好反映水电站运行时的各种非线性动力特性。针对水电站系统较为复杂的特点,该模型的建立可对电站发电系统进行全面的数值模拟以评价和预测其运行安全性和结构可靠性,从而为水电站在极限工况和过渡工况的运行动态控制提供有益参考。
[Abstract]:A new nonlinear dynamic coupling model of hydropower station system is established, which includes water diversion system, hydraulic turbine, governor, generator electromagnetic system, power grid, power unit shafting and powerhouse coupling structure. Based on the theory of hydraulic, motor and structure, a set of differential equations involving hydraulic, mechanical and electromagnetic factors is constructed, and the model of shafting and powerhouse structure is established by finite element method. Combined with the secondary development function of Ansys, the research method of the dynamic characteristics of the coupled structure model of the unit and the powerhouse under the influence of water, machine and electricity is put forward. By using the difference method and the characteristic line method, the model is used to simulate and analyze the operating conditions of the hydropower station system, and the rationality of the model is verified. The calculation results show that the model can simulate and calculate the operation process of hydropower station system under start-up conditions, and can well reflect all kinds of nonlinear dynamic characteristics of hydropower station. In view of the complex characteristics of hydropower station system, the establishment of the model can carry out comprehensive numerical simulation to evaluate and predict the operation safety and structural reliability of the power generation system. It provides a useful reference for the dynamic control of the hydropower station under the limit and transient conditions.
【作者单位】： 大连理工大学建设工程学部水利工程学院;太原理工大学水利科学与工程学院;
【基金】：国家自然科学基金(51379030) 太原理工大学校青年基金(2015QN029)
【分类号】：TV734
，
本文编号：2383144
[Abstract]:A new nonlinear dynamic coupling model of hydropower station system is established, which includes water diversion system, hydraulic turbine, governor, generator electromagnetic system, power grid, power unit shafting and powerhouse coupling structure. Based on the theory of hydraulic, motor and structure, a set of differential equations involving hydraulic, mechanical and electromagnetic factors is constructed, and the model of shafting and powerhouse structure is established by finite element method. Combined with the secondary development function of Ansys, the research method of the dynamic characteristics of the coupled structure model of the unit and the powerhouse under the influence of water, machine and electricity is put forward. By using the difference method and the characteristic line method, the model is used to simulate and analyze the operating conditions of the hydropower station system, and the rationality of the model is verified. The calculation results show that the model can simulate and calculate the operation process of hydropower station system under start-up conditions, and can well reflect all kinds of nonlinear dynamic characteristics of hydropower station. In view of the complex characteristics of hydropower station system, the establishment of the model can carry out comprehensive numerical simulation to evaluate and predict the operation safety and structural reliability of the power generation system. It provides a useful reference for the dynamic control of the hydropower station under the limit and transient conditions.
【作者单位】： 大连理工大学建设工程学部水利工程学院;太原理工大学水利科学与工程学院;
【基金】：国家自然科学基金(51379030) 太原理工大学校青年基金(2015QN029)
【分类号】：TV734
，
本文编号：2383144
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