Integration of PMSG-Based Wind Turbine into Electric Power Distribution System Load Flow Analysis

In this paper, a simple method for modeling and integrating PMSG (Permanent Magnet Synchronous Generator)-based WPP (Wind Power Plant) for load flow analysis of electric power distribution systems is proposed. The proposed model is derived based on: (i) the PMSG torque current equations, (ii) the relationships between PMSG voltages/currents in q-axis and d-axis, and (iii) the equations of WPP powers (namely: turbine mechanical power input, WPP power loss and power output). Application of the proposed model in representative electric power distribution system is also investigated and presented in this paper. The results of the investigation confirm the proposed model validity. The confirmation can also be verified by observing the load flow analysis results where, for each value of turbine power, the substation power output plus the WPP power output is always equal to the total system load plus total line loss (the line loss has been calculated based on the impedances and currents of the distribution lines).