在我国发生“电荒”的期间,美国及加拿大几大城市发生大规模停电事故,虽然事件的性质与原因并不一样,两者之间没有可比性。但在电网系统建设方面对我国起着警示作用。据美国原能源部部长比尔·理查德森分析:美加大规模停电事故的原因之一是没有按需要建立起充足的电力传输网。美国电力研究协会也透露,在过去10年间,美国的电力需求量增长了30％,但同一时 During the “electricity shortage” in our country, a large-scale power outage occurred in several major cities in the United States and Canada. Although the nature and reason of the incident are not the same, the two are not comparable. However, it plays a warning role for our country in the construction of power grid system. According to Bill Richardson, former US Department of Energy director, one of the reasons for the U.S.-Canada major blackouts is the lack of adequate power transmission networks as needed. American Electric Power Research Association also revealed that in the past 10 years, the United States increased by 30% of electricity demand, but the same time