Aiming at the restoration problem of asynchronous receiving end power grid

a partition method for system restoration is proposed

which considers the structure characteristics of network community and the interaction between AC and DC system. Firstly

on the basis of analyzing the interaction

the system strength indices are added to the partition principle and constraints

and the optimal transmission power of each line commutated converter based high voltage direct current(LCC-HVDC)system is obtained by solving the corresponding optimization model. Then

a partition model is proposed for the asynchronous receiving end power system restoration. Secondly

by taking the comprehensive influence on the bus short-circuit capacity of each HVDC dropping location as the weight

the weighted edge betweenness of branch circuit is defined. The partition number can be automatically determined according to the partition constraints and the number of black start sources. An improved GN splitting algorithm is then used to realize the reasonable partition of the multi-infeed HVDC receiving end power grid. Based on the partition results

the restoration time and load restoration capacity are calculated. Finally

the partition results of the IEEE 39-bus system and a local power grid in a southern province of China verify the feasibility and effectiveness of the proposed method.