Muti-infeed HVDC systems inject power into receiving end power grid by cross-region transmission

once the power is lost

the power dynamic balance of grid will be destroyed

and the frequency of grid will cause violent fluctuation.Firstly

this paper analyzes DC absorption influence factor and evaluation indexes in receiving end power grid. Secondly

weighted node load is used to evaluate the controllable capacity under the situation of HVDC power loss

the power flow is controlled efficiency based on electrical distance load controlled method. Finally

the frequency of the receiving end power grid will drop rapidly when the HVDC power loss is simulated and verified

meanwhile

the speed of frequency recovery is solved through the electrical distance load control model. The influence of power shutdown on users is reduced

and a strong guarantee for DC absorption is provided.