Real-time monitoring of long-term voltage stability via local linear regression

A novel approach for real-time monitoring of long-term voltage stability using local linear regression and adaptive training database is proposed in this paper. Comparing to previous methods, the proposed local predictive regression model could properly balance the simplicity/transparency and accuracy, and it is also adaptive to the changes of system and operating conditions. The approach is tested on IEEE 30-bus system. Preliminary results show that it can be successfully employed in online voltage stability monitoring.