电气设备抗震性能对变电站系统功能的影响分析

Influence on substation system functionality due to seismic performance of electrical equipment

变电站是由一系列电气设备组成的复杂系统。目前,各类减、隔震装置可以显著提升电气设备的抗震性能,然而,单体设备抗震性能的提升对系统抗震性能的影响难以量化。在前期研究的基础上,通过参数分析确定了决定变电站抗震性能的关键设备,进一步量化了提升这些设备抗震能力对变电站系统抗震性能的影响程度,研究结果表明:不同类型电气设备对系统功能的影响模式不同且与系统功能需求相关;从系统功能的角度,隔离开关、电流互感器和断路器是变电站的薄弱环节,变压器的影响不大;采用减、隔震技术提高变电站的抗震能力应重点关注关键设备。

Substations are complex systems consisting of various interconnected electrical equipments.At present,different types of seismic mitigation and isolation devices have been used to improve the seismic performance of individual equipment.Nevertheless,the effects on the overall system performance of substations using these technologies remain unclear.In this study,the critical equipment was identified through parameter analysis based on its influence on the median capacities of substations.The effects on overall system performance to strengthen the critical equipment were further quantified.The results show that the influences of different equipments on system performance varies in terms of the level of system functionality.From the perspective of functionality,disconnect switches,current transformers,and circuit breakers are the weak links of the substation,while transformers have little overall influence.To strengthen seismic capacities of substation,seismic mitigation and isolation devices should be applied on critical equipment.