由于大型城市电网负荷集中、人口密集,一旦停电影响巨大,因此保障电网安全运行意义重大,任务十分艰巨。在复杂又紧迫的用电形势下,如何建立适合高负荷密度的大型城市受端电网发展的输电模式,提高大型城市电网运行的安全性和可靠性,减少大型城市电网事故的发生风险,具有重要的研究价值。 As large-scale urban power grids are heavily loaded and densely populated, it is of great significance to ensure the safe operation of power grids in the event of a power outage. The task is arduous. Under the complex and urgent situation of power consumption, it is important to establish a transmission mode suitable for the development of power grids in large cities with high load density, improve the safety and reliability of grid operation in large cities, and reduce the risk of grid incidents in large cities. Research value.