变电站主接线系统抗震韧性多指标评估流程

Multi-index evaluation process of seismic resilience of substation main wiring system

为了量化评估变电站主接线系统的抗震韧性,充分考虑变电站的地震响应及修复过程的不确定性,提出变电站系统抗震韧性多指标评估流程,全面评估变电站系统抵御地震风险和震后功能恢复的能力.引入单元重要度概念,求解系统不同功能状态的最优恢复方案,基于时间步长推进方法,获得变电站系统在模拟破坏工况下的实时修复进程,得到主接线系统性能恢复曲线,计算对应的供电需求、冗余率、震后性能及修复速率等抗震韧性指标.以典型6进线10出线220/110/10 kV变电站作为实例进行抗震韧性定量评估,结果表明基于功能单元重要度概念的最优恢复方案能够有效减少系统恢复阶段达到最大功能状态所用时间.

To quantitatively evaluated the seismic resilience of the substation main wiring system and fully considered the uncertainty of the substation’s seismic response and repair process,a multi-index evaluation process of the seismic resilience of the substation system was proposed to comprehensively evaluate the ability of the substation system to resist earthquake risks and recover its functions after earthquakes.The concept of unit importance was introduced to solve the optimal recovery scheme for different functional states of the system.Based on the time step advancement method,the real-time repair process of the substation system under the simulated damage condition was obtained,and the performance recovery curve of the main wiring system was obtained.The corresponding seismic resilience indexes such as power supply demand,redundancy rate,post-earthquake performance and repair rate were calculated.Taking a typical 6 incoming and 10 outgoing 220/110/10 kV substation as an example,the quantitative evaluation of seismic resilience was carried out.Results showed that the optimal recovery scheme based on the concept of functional unit importance could effectively reduce the time for the system to reach the maximum functional state in the recovery phase.