Static voltage stability prediction for PCCs of new energy power stations in the grid-connected system

To estimate the static voltage stability of PCC (Points Common Coupling) wind/PV (Photovoltaic) in new energy resources grid-connected system, a modified index NVSI that adds stochastic power to calculate values is proposed, based on IVSI derived from flow equations traditional system. A short-term prediction model considering several meteorological factors and using RF (Random Forest) algorithm presented. The RF’s accuracy affirmed by comparing with BP-ANN typical day, predicted are substituted into predict PCC’s IEEE 14-bus system wind/PV, practicability effectiveness affirmed.