To address the recurring vibration in the integrated unit-plant structure system during the transitional phases of pumped storage power station (PSPS), the magnetorheological damper (MRD) is introduced in this paper to investigate transient vibration control within the coupled unit-plant structure (CUPS). Firstly, taking an actual PSPS as a case study, a unit regulation system model is developed based on one-dimensional transient flow theory, the method of characteristics (MOC), and the improved Suter transformation. Secondly, integrating the position function of unit shaft system, a nonlinear dynamic model of MRD is constructed, and the MRD damping force accounting for axial position parameters is derived. Additionally, on the basis of Lagrange method and finite element method, a mathematical model of unit shaft system and a finite element model for plant structure under the coupling effects of multiple vibration sources are established. Finally, the response to a sudden 10% load increase in generator condition of pumped storage unit is calculated through numerical simulation, and the effects of different damper position functions on the vibration characteristics of rotor and runner are analyzed to identify the optimal installation position for effective vibration control. The research results indicate that, optimizing the damper layout position enables the MRD to effectively reduce the vibration amplitude of rotor and runner, enhancing spectral characteristics. Furthermore, optimizing MRD positions significantly improves the vibration performance of plant structure. After the optimization of MRD positions, the vibration attenuation rate of plant structure accelerates, leading to a quicker stabilization, particularly noticeable in the generator floor. The findings of this study offer valuable engineering guidance for managing transient vibration in the integrated unit-plant system of PSPS.

中文翻译：

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基于MRD优化布局的抽水蓄能电站单元-厂耦合结构瞬态振动控制


为了解决抽水蓄能电站 （PSPS） 过渡阶段单元-电厂结构系统中反复出现的振动，本文引入了磁流变阻尼器 （MRD） 来研究耦合单元-电厂结构 （CUPS） 内的瞬态振动控制。首先，以实际的 PSPS 为例，基于一维瞬态流理论、特征法 （MOC） 和改进的 Suter 变换建立了单元调节系统模型。其次，积分单元轴系位置函数，构建 MRD 非线性动力学模型，推导考虑轴向位置参数的 MRD 阻尼力;此外，在拉格朗日法和有限元法的基础上，建立了多振动源耦合作用下的单元轴系数学模型和被控对象结构有限元模型。最后，通过数值仿真计算抽水蓄能机组发电机状态负载突然增加 10% 的响应，并分析不同阻尼器位置函数对转子和转轮振动特性的影响，以确定有效控制振动的最佳安装位置。研究结果表明，优化阻尼器布局位置使 MRD 能够有效减小转子和转轮的振动幅值，增强频谱特性。此外，优化 MRD 位置可显著提高工厂结构的振动性能。优化 MRD 位置后，工厂结构的振动衰减率加快，从而更快地稳定，在发电机地板上尤为明显。 本研究的结果为 PSPS 集成单元-被控设备系统中的瞬态振动管理提供了有价值的工程指导。