Due to the influence of DG output and load fluctuation

the load shall be cut down in accordance with load importance degree in case of insufficient power supply of isolated island. As for the such problem of existing load level classification method as no load importance quantification and difficult comparison of same level load

in this paper

a kind of comprehensive evaluation method of load importance degree is proposed and

on this basis

reliability evaluation of distribution grid with DG consideration is performed.Firstly

the index system for measuring load importance degree is established

then the weight of each index is defined by the subjective and objective combination method is adopted

the comprehensive evaluation value of the load importance is calculated and the importance degree of the load is quantized by way of improved rank correlation analysis method. Finally

the reliability evaluation of distribution network with DG considering load importance degree is taken into account. Both effectiveness and practicability of the method is described with IEEE-RBTS simulation system as an example.