CAJ | 학술논문

目前我国对电气设备抗震级别的规定低于国际上其他标准的要求，并且设防标准的确定考虑设防烈度、场地条件、设计地震分组等多种组合条件，不利于方便快捷地判断设备的抗震级别。通过对比国内外相关规范中对电气设备抗震设防级别的规定，分析电气设备进行分级抗震设防的优势，建议对我国的电气设备进行分级抗震设防。采用典型电气设备抗震可靠度指标作为参数，对建议的电气设备的抗震设防等级进行划分，提出高、中、低三等级原则。
목전아국대전기설비항진급별적규정저우국제상기타표준적요구，병차설방표준적학정고필설방열도、장지조건、설계지진분조등다충조합조건，불리우방편쾌첩지판단설비적항진급별。통과대비국내외상관규범중대전기설비항진설방급별적규정，분석전기설비진행분급항진설방적우세，건의대아국적전기설비진행분급항진설방。채용전형전기설비항진가고도지표작위삼수，대건의적전기설비적항진설방등급진행화분，제출고、중、저삼등급원칙。
The seismic fortification levels of electrical equipment have received more and more at-tention since the Wenchuan earthquake.The current seismic requirement level of electrical equip-ment in China is lower than that of other international standards,such as IEEE 693,IEC 62271, and JEAG 5003.In China,the seismic level of electrical equipment is decided by combining several conditions of fortification intensity,site condition,and classification of design earthquake,which makes it difficult to determine the seismic level of electrical equipment quickly and conveniently. By comparing domestic and foreign codes about the seismic fortification level of electrical equip-ment,the advantages of grading fortifications are summarized.Consequently,grading the fortifica-tions for electrical equipment in China was proposed.In order to obtain the principles of this grad-ing,the seismic reliability of electrical equipment was calculated.Design earthquake accelerations exceeding a failure probability of 2% in 50 years,which were higher than the normal value and obtained by survey,were used as calculation parameters.Two typical pillars of electrical equip-ment were chosen as calculation modals,and the seismic reliability of electrical equipment in ordi-nary porcelain and high-strength porcelain was calculated using the FOSM method.The use of de-sign earthquake accelerations exceeding a failure probability of 2% in 50 years will meet the seis-mic target of not collapsing with strong earthquakes,which will further ensure the seismic safety of electrical equipment.The seismic reliability of high-strength porcelain equipment was obviously higher than that of ordinary porcelain equipment.It is an effective method to improve equipment seismic capacity through replacing ordinary porcelain by high-strength porcelain.The reliability results were used as indexes to determine the low,medium,and high levels.Specifically,peak ac-celerations of 0.1 g and below were considered to be at a low assessment level,and the peak accel-eration was taken to be 0.1 g.Values of 0.1~0.4 g corresponded to the medium assessment level, and the peak acceleration was taken to be 0.4 g.Values above 0.4 g comprise the high assessment level,and the peak acceleration was taken to be 0.6 g.By comparing the peak acceleration with those of IEEE and IEC standards,it is found that the proposed seismic fortification for electrical equipment is more reasonable.The acceleration value of each seismic level is slightly lower than the values given by IEEE and IEC.