A preliminary study on key characteristics and technical research framework of urban tenacious power grid

In the future, the power grid will face a series of changes, which are reflected in different levels of source, network and load. At present, the power grid's ability to deal with natural disasters, operation faults, internal and external shocks is weak, the structure and tolerance of the power grid still need to be improved, and the power grid needs to be further improved, so the tenacity in the power system has been widely concerned. However, most of the existing researches focus on the recovery ability of power grid under extreme natural disasters. However, in addition to extreme natural disasters, there are also serious system failures, man-made damage, terrorist attacks and misoperation which have a small probability and have a great impact on the power system. Therefore, this paper holds that the tenacity of the power grid refers to the ability of the power grid to predict, retain and release all kinds of energy, that is, the means and ability to adapt to environmental changes and respond to external disturbances. Therefore, from the concept of tenacious grid, this paper discusses the research field and evaluation index of flexible.