For solving such problem as difficult identification of complex disturbance of the power quality of power system and

at the same time evidence provision of reactive power compensation of grid

a kind of complex disturbance identification method of power quality based on multi-feature combination is proposed. Wavelet packet transform（WPT） and S-transform are used to perform time-frequency analysis of the power quality disturbance signal

extract amplitude and frequency characteristics of signal and establish multi-feature combination of power quality disturbance. Then

the probability neutral is adopted to establish multi-feature combination classifier so to achieve classification identification of power quality disturbance. It is proved by the simulation experiment that the method can identify seven kinds of power quality disturbances including two kinds of compound disturbances

have higher classification accuracy and interference resistance ability as well as engineering application value.