Assessment method of grid-connection performance for distributed voltage source converters

Considering grid-connected performance under various typical working conditions, a grid-connected performance assessment method based on measured data is proposed in this paper. First, Three level index system of grid-connected performance evaluation is established, the acquisition condition and data processing method of the measured data are analyzed. Then, the calculation and feature extraction methods of each individual index under multi conditions are presented. And then using analytic hierarchy process, weight of the same level of indicators and the relationship between the upper and lower levels, based on improved membership function, fuzzy mathematical model for grid-connected performance indexes of distributed converters is built. Finally, the grid-connected performance of 132kW distributed voltage source converters in Nanjing is evaluated, the effectiveness and practicality of method presented in this paper are verified.