基于TMD阻尼器高压电气设备地震响应及振动控制

变电站高压电气设备如互感器、断路器、隔离开关等,在维持电力系统的正常运行中起到了关键性作用。当发生地震灾害时,变电站中电瓷型电气设备最容易发生破坏,造成重大经济损失。利用数值分析方法,建立了典型高压电气设备的三维有限元模型,研究了典型SF6断路器的地震响应,同时分析并对比安装环形调谐质量阻尼器(简称TMD阻尼器),通过改变阻尼器阻尼系数及质量块质量,研究了安装环形TMD的振动控制效果。研究结果表明:在地震作用下,断路器边侧极柱顶端易产生较大位移,根部易产生较大应力,当安装TMD阻尼器时,随着阻尼器阻尼系数和质量块质量的变化,断路器位移、应力、加速度变化符合一定规律,并且当阻尼系数取0.05左右,质量比取主体结构质量的9.375%时,减震效果最佳。研究结果对指导高压电器设备的抗震设计提供有价值的参考。

Study of seismic response and vibration control of High voltage electrical equipment damper based on TMD

Substation high voltage electrical equipment such as mutual inductor, circuit interrupter, disconnecting switch, etc., has played a key role in maintaining the normal operation of the power system. When the earthquake disaster, the electrical equipment of the porcelain in the transformer substation is the most easily to damage, causing great economic losses. In this paper, using the method of numerical analysis, the establishment of a typical high voltage electrical equipment of three dimensional finite element model, to study the seismic response of a typical SF6 circuit breaker, at the same time, analysis and contrast the installation ring tuned mass damper (TMD damper for short), by changing the damper damping coefficient and the mass block, install annular TMD vibration control effect is studied. The results show that under the seismic action, the circuit breaker side column top easy to produce a larger displacement, the roots are prone to large stress, when the installation of TMD damper with damper damping coefficient and the change of the mass block, circuit breaker displacement, stress and acceleration change accord with certain regularity, and when the damping coefficient about 0.05, quality than 9.375%, the quality of structure of the shock absorption effect is best. The results of the study for guiding the seismic design of high voltage electrical equipment to provide valuable reference.