Load flow calculation for flexible ac transmission systems

摘要

In this paper, a synthetic mathematical model of load flow for flexible AC transmission sys- tems (FACTS) with unified power flow controller (UPFC) is presented based on the analysis of basic principle and operation state of UPDFC. The model can use the fast P-Q decoupled load flow method. Examples of test systems show that the proposed model and method have good convergence. An effec- Tive tool is provided by the load flow computer program to analyze the load flow and initial valve calcula- Tion of the dynamic state of FACTS.