美国加州2020年8月中旬停电事故分析及思考

Analysis and reflection for the rotating outages in mid-August 2020 in California

2020年8月14日和15日,美国加州电网发生停电事故,共约81万人次受到停电影响。文中对该事故进行总结分析,为我国电网的安全稳定运行提供借鉴和参考。首先,对此次极端高温天气造成的切负荷和轮停事件进行介绍,分析总结造成该停电事故的主要原因,引入2个新能源反调峰特性的量化评估指标。然后,根据加州电网的实际,给出了加州相关机构针对该事故的短期及中长期应对措施。最后,结合此次停电事故所暴露的问题,从3个方面总结了对我国电网的启示,一是在电网规划及运行方面要建立考虑极端情况影响的电源规划机制,同时更加关注新能源快速发展过程中全省净用电负荷曲线变化特征;二是要优化电力市场建设;三是要提升电网柔性调控手段和能力。

On August 14 and 15,2020,rotating outages occurred in California power grid in the United States,affecting approximately 810,000 people.The rotating outages is summarized and analyzed to provide reference for the safe and stable operation of China power grid.Firstly,the cutting load and rotating outage events caused by the extreme high temperature weather is introduced and the main causes of the rotating outages is summarized.Secondly,according to the actual situation of California power grid,the short-term and long-term countermeasures presented by the relevant institutions of California for this accident are given.Finally,combined with the problems exposed by the rotating outages,the enlightenment to China power grid is summarized from three aspects.Firstly,in the planning and operation of the power grid,more attention should be paid to the variation characteristics of net power load curve in the rapid development of new energy in the province.At the same time,a power planning mechanism that considers the influence of extreme situations should be established.Secondly,the power market construction should be optimized.Thirdly,the flexible control measures and capability of power grid should be improved.