Experimental Study On Seismic Performance Of Gas Insulator Switchgear

In modern society, as an important energy for human society, the electric power isclosely related to people’s normal production and life, and it is the key to maintainingurban life. Once the electric power is interrupted, it will not only cause serious impact tothe social life, but also bring huge economic losses to the people, and even lead to socialunrest, which in turn affect the development of the national economy and the wholesociety. Therefore, many countries are very concerned about the normal operation andsecurity of the power system. Earthquake is an unexpected and devastating naturaldisaster, and it is one of the disaster that most likely to lead the power system sufferingserious damage. The large number of domestic and international earthquake damageexamples show that the damage caused by a strong earthquake on the power system ishuge. In particular, due to the characteristics of its own structure and material properties,the high-voltage electrical equipments of the power system are more seriously destroyed.Therefore, to carry out the study of the seismic performance of high voltage electricalequipments is of great significance and value.Gas Insulator Switchgear is a type of high-voltage power distribution equipment.Because of its advantages such as little area occupied, high security, strong reliabilityand easy operation and maintenance, it has been widely used in recent years. In thispaper, model ZF33-126Gas Insulator Switchgear produced by Shandong TaishanHenxin switch Co., Ltd. is tested on the shaking table. And its dynamic characteristicsare studied by white noise excitation’s probing to obtain its natural frequency anddamping ratio. Based on the theory of generating artificial earthquake via the standardresponse spectra, suitable artificial earthquake which applied to the test by using thecomputer program that convert response spectrum to artificial waves is synthesized. And, actual seismicgaphic record of Elcentro wave is also inputted in shaking table test.By experiment, seismic response time history curves and data of the acceleration,displacement and strain of the key parts’ are acquired. Then according to《Seismicqualification of High-voltage switchgear and controlgear》（GB/T13540-2009）, theequipment’s performance is assessed. The results show that its seismic performancemeets the requirements.In addition, the dynamic time history analysis of the ZF33-126GIS high voltageswitch equipment model is conducted in the finite element analysis software. Athree-dimensional finite element model of the equipment is established in ANSYS. Inorder to compare with the test results, the ground motion input for the calculation of themodel is the same with the output of the vibration table in the experiment. Thecalculated results are agreed with the experimental results within the permissible errorrange. Thus it verified the feasibility of the experiment scheme and the reasonablenessof the finite element model which provide a theoretical and experimental basis forfurther study of the seismic performance of these equipments.