针对混合质量阻尼器(Hybrid Mass Damper,HMD)在结构减振控制中控制力输出和质量块冲程过大的问题,提出变阻尼混合质量阻尼器(Variable Damping Hybrid Mass Damper,VD-HMD)控制系统,在不降低控制效果的情况下减小控制力输出和降低质量...针对混合质量阻尼器(Hybrid Mass Damper,HMD)在结构减振控制中控制力输出和质量块冲程过大的问题,提出变阻尼混合质量阻尼器(Variable Damping Hybrid Mass Damper,VD-HMD)控制系统,在不降低控制效果的情况下减小控制力输出和降低质量块的冲程,并获得更好的控制效果。首先,建立VD-HMD控制系统的力学模型和运动方程;然后,利用一个设置有VD-HMD的单自由度模型作为研究对象,并将磁流变阻尼器作为变阻尼单元,进行数值分析;最后,论述VD-HMD控制系统的减振机理。仿真结果表明:VD-HMD系统有效解决控制装置的控制力输出和质量块的冲程过大的问题,并进一步提升控制效果,降低结构响应的效果更为优异。展开更多
为解决混合主动调谐质量阻尼器(Hybrid Active Tuned Mass Dampers,HATMD)中小质量块有较大冲程的问题,提出了增强混合主动调谐质量阻尼器(Enhanced Hybrid Active Tuned Mass Dampers,EHATMD)。具体地说,是在受控结构与HATMD中的小质...为解决混合主动调谐质量阻尼器(Hybrid Active Tuned Mass Dampers,HATMD)中小质量块有较大冲程的问题,提出了增强混合主动调谐质量阻尼器(Enhanced Hybrid Active Tuned Mass Dampers,EHATMD)。具体地说,是在受控结构与HATMD中的小质量块之间设置一个连接阻尼器而构成EHATMD系统。在频域内,推导出结构-EHATMD系统的动力放大系数解析式,进而定义了EHATMD系统的最优化准则。使用遗传算法(Genetic Algorithm,GA),研究了连接阻尼比和正、负标准化加速度反馈增益系数对EHATMD(简称为正反馈EHATMD和负反馈EHATMD)最优参数和减振有效性以及大、小质量块冲程的影响行为。此外,为比较的目的,同时给出了正反馈HATMD和负反馈HATMD的GA优化结果。数值结果表明,EHATMD系统优于HATMD系统;而且,负反馈EHATMD是一种高性能的减振控制装置。展开更多
A mathematical approach was proposed to investigate the impact of high penetration of large-scale photovoltaic park(LPP) on small-signal stability of a power network and design of hybrid controller for these units.A s...A mathematical approach was proposed to investigate the impact of high penetration of large-scale photovoltaic park(LPP) on small-signal stability of a power network and design of hybrid controller for these units.A systematic procedure was performed to obtain the complete model of a multi-machine power network including LPP.For damping of oscillations focusing on inter-area oscillatory modes,a hybrid controller for LPP was proposed.The performance of the suggested controller was tested using a 16-machine 5-area network.The results indicate that the proposed hybrid controller for LPP provides sufficient damping to the low-frequency modes of power system for a wide range of operating conditions.The method presented in this work effectively indentifies the impact of increased PV penetration and its controller on dynamic performance of multi-machine power network containing LPP.Simulation results demonstrate that the model presented can be used in designing of essential controllers for LPP.展开更多
文摘针对混合质量阻尼器(Hybrid Mass Damper,HMD)在结构减振控制中控制力输出和质量块冲程过大的问题,提出变阻尼混合质量阻尼器(Variable Damping Hybrid Mass Damper,VD-HMD)控制系统,在不降低控制效果的情况下减小控制力输出和降低质量块的冲程,并获得更好的控制效果。首先,建立VD-HMD控制系统的力学模型和运动方程;然后,利用一个设置有VD-HMD的单自由度模型作为研究对象,并将磁流变阻尼器作为变阻尼单元,进行数值分析;最后,论述VD-HMD控制系统的减振机理。仿真结果表明:VD-HMD系统有效解决控制装置的控制力输出和质量块的冲程过大的问题,并进一步提升控制效果,降低结构响应的效果更为优异。
文摘为解决混合主动调谐质量阻尼器(Hybrid Active Tuned Mass Dampers,HATMD)中小质量块有较大冲程的问题,提出了增强混合主动调谐质量阻尼器(Enhanced Hybrid Active Tuned Mass Dampers,EHATMD)。具体地说,是在受控结构与HATMD中的小质量块之间设置一个连接阻尼器而构成EHATMD系统。在频域内,推导出结构-EHATMD系统的动力放大系数解析式,进而定义了EHATMD系统的最优化准则。使用遗传算法(Genetic Algorithm,GA),研究了连接阻尼比和正、负标准化加速度反馈增益系数对EHATMD(简称为正反馈EHATMD和负反馈EHATMD)最优参数和减振有效性以及大、小质量块冲程的影响行为。此外,为比较的目的,同时给出了正反馈HATMD和负反馈HATMD的GA优化结果。数值结果表明,EHATMD系统优于HATMD系统;而且,负反馈EHATMD是一种高性能的减振控制装置。
文摘A mathematical approach was proposed to investigate the impact of high penetration of large-scale photovoltaic park(LPP) on small-signal stability of a power network and design of hybrid controller for these units.A systematic procedure was performed to obtain the complete model of a multi-machine power network including LPP.For damping of oscillations focusing on inter-area oscillatory modes,a hybrid controller for LPP was proposed.The performance of the suggested controller was tested using a 16-machine 5-area network.The results indicate that the proposed hybrid controller for LPP provides sufficient damping to the low-frequency modes of power system for a wide range of operating conditions.The method presented in this work effectively indentifies the impact of increased PV penetration and its controller on dynamic performance of multi-machine power network containing LPP.Simulation results demonstrate that the model presented can be used in designing of essential controllers for LPP.
