Rapid Estimation of Temporary Overvoltage for Heterogeneous Wind Power-integrated System

Temporary overvoltage (TOV) may arise in various Wind Farms (WFs) after the fault clearance due to the control lagging, which critically restricts the development of renewable energy sources, and threaten the safe operation of power systems. To deal with this problem, a rapid TOV estimation method is proposed in this paper. First, the equivalent models for different types of grid-connected Wind Turbines (WTs) are proposed. On this basis, an analytical TOV estimation method in a Heterogeneous Wind Power-integrated System (HWPS) is investigated. Thereafter, the weighted sensitivity matrix is further proposed to localize the weakest WT bus and the corresponding fault location, thus the rapid TOV estimation in a HWPS is realized. EMT simulations are performed to validate the accuracy and rapidity of the proposed TOV estimation method.