Wide-Area Emergency Control of Active and Reactive Power of Converter-Interfaced Wind Power Generation for Transient Stability Improvement in Power Systems

Development of event‐based centralized excitation control method of synchronous generators for improving the transient stability

“…Transient stability was previously shown to improve by suppressing acceleration in critical machines. 12,13 Thus, one can assume that transient stability improves when Δe f,k is inputted to AVR so as to suppress acceleration of a critical machine. Calculation of Δe f,k to suppress ω COI,CM is explained below.…”

“…When the excitation voltage in Equation () is changed by Δ e f , n , the first derivative dP e , i / dt of active power output changes at once 8 . Previous studies 12,13 dealing with emergency control of renewable energy generators were focused on the fact that converter output fluctuations caused immediate changes in the active power output of synchronous generators; thus, control rules were formulated using $$\dot{\omega}$$ COI , CM as an index. In contrast, the present study deals with excitation voltage control in synchronous generators and proposes control rules formulated using ω ̈ COI , CM as an index, considering that excitation voltage has an immediate effect on the first derivative of active power output, as mentioned above.…”