Study of considering the interruptible load to improve the limit tranimission power of section under the constraints of N-1 static security

Introduce the viewpoint of interruptible load into N-1 static security analysis of transmission capacity of transmission section; broaden the conditions of traditional N-1 analysis through using the interrupt load management in receiving areas. A detailed mathematical model of the power flow constraints of transmission section considering the interruptible load is established and the solving methods based on sensitivity analysis is also given, and the relationship between the increments of limit tranimission power of section and the interruptible load quantities is obtained on this basis. The IEEE39 nodes numerical example in BPA running environment shows that the application of interruptible load to improve limit tranimission power of section can improve the operation economy while guaranteeing the security of the power system.