Assessment of node voltage vulnerability of power system with wind farm

This paper studies the voltage vulnerability of the power system with wind farm, with emphasis on calculating the index of node voltage vulnerability. In this paper, the wind farm is regarded as a random disturbance source, so the system is divided into different operating conditions according to the change of wind speed. Then node voltages of the power system with wind farm in different wind conditions are calculated by power flow calculation, critical voltage is calculated by preserving nonlinear flow algorithm (PNFA) integrating the optimal multiplier, and the index of nodes voltage vulnerability is calculated in the end. The simulation of the IEEE14 bus system with wind farm is carried out. The effect of power system with wind farm on node voltage vulnerability is evaluated by comparing the effects of node voltage vulnerability index and different parallel points on the vulnerability and vulnerability ranking.