一、电网事故状况随着社会的不断发展，用电需求不断增加，电力系统的规模也日益扩大。我国的电力事业已步入了高电压、大电网、大机组的时代。这对于能源的合理开发和利用，节省运行费用和投资，增加对用户供电的可靠性都具有明显的优越性。但是，大电网也带来了一系列的新问? First, the grid accident situation With the continuous development of society, increasing demand for electricity, the power system is also growing in size. China’s power industry has entered the era of high-voltage, large power grids and large units. This has obvious advantages for the rational development and utilization of energy, saving operating costs and investment, and increasing the reliability of user power supply. However, the big power grid also brought a series of new questions?