With the rapid development of renewable power

the number of converters is greatly increased. To improve the simulation efficiency

this paper proposes a novel state-space averaged pulse-width modulation(PWM)converter model. In the model

the averaged variables of switching functions are calculated based on amplitude distribution functions. Meanwhile

the Dommel equivalents of the proposed model are derived for the nodal analysis method. Besides

a predictor-correction iterative algorithm is dedicatedly designed to solve the parameters to be determined in this model. Based on the predictor-correction iterative algorithm

the proposed model can further extend the averaging period to boost simulating speed. With an AC system containing multiple photovoltaic stations as an example

by comparing the detailed model

the dynamic averaged model

and the averaged model based on the amplitude distribution model

the accuracy and rapidity of the proposed model is verified. This work is supported by State Grid Corporation of China(No. NYB17201300057).