1 000 kV电容式电压互感器抗震性能优化研究

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Abstract For ensuring the seismic safety of an important electrical equipment in an ultra high voltage power transformation project, improving the seismic withstand capability of theporcelain equipment, the seismic performances of a 1000 kV capacitor voltage transformer(CVT) with and without mental dampers were investigated by shaking table tests.The test result shows that the application of dampers reduces peak stress at the bottom of the equipment and peak acceleration at the top of the equipment by 59% and 54%, respectively.Considering the disadvantage in seismic performance for the equipment displayed in test, a finite element model was established to further explorer structure defect of equipment.A structural remolding optimization scheme improving the equipment as monolithic tower-type and adjusting outer diameter difference between the middle and bottom section of bushing to 5 mm locally by reducing material was proposed.After optimization, the maximum stress of the equipment reduces from 32.46 MPa to 20.18 MPa.The maximum stress ratio of the bottom bushing to the top bushing reduces from 7.92 to 2.33, which indicates that stress distribution is more balanced.The seismic precautionary requirement which the equipment can meet is increased from 0.2g to 0.3g.For different seismic optimization targets from 0.3—0.5g, corresponding strategies for improving the seismic performance of the 1 000 kV capacitor voltage transformer, which combine modification in construction with energy absorption, were proposed.

Key words： capacitor voltage transformer(CVT) seismic performance structure optimization energy dissipation

Received: 26 June 2018 Published: 15 December 2019

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	Articles by authors
	LIN Sen
	CHENG Yongfeng
	MENG Xianzheng
	SUN Yuhan
	LU Zhicheng
	ZHANG Qian

Cite this article:

LIN Sen,CHENG Yongfeng,MENG Xianzheng, et al. A study on the seismic performance optimization of a 1 000 kV capacitor voltage transformer[J]. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(24): 91-100.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2019/V38/I24/91

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