In view of the fact that the lifeline project of current power grid has been unable to fully meet the phenomena requested for the current power grid in dealing with extreme natural disasters

a kind of grid lifeline planning method adapting to new development is creatively proposed in this paper. Firstly

a fully new research idea of grid lifeline planning is introduced. Then

the grid lifeline planning principle is determined from such three aspects as important load and power supply planning

grid planning of each voltage level and grid black start planning. Finally

Taizhou power grid is selected as a case to analyze the weak link of the power grid. The effectiveness of the method in this topic is verified with combination of the fourteenth Five Year Plan and through research of lifeline planning scheme of its full-voltage level grid so as to make the grid structure of Taizhou power grid more perfect.