XADVANCE: a tool for dynamic analysis and its application

This paper describes XADVANCE, a newly developed tool to analyze the short-term and long-term dynamics of power systems including dynamically changeable components. This paper first outlines XADVANCE, then describes the following features: (1) because no iterative algorithm is used to calculate network conditions, there is no mathematical instability; and (2) a universal dynamics simulation module is used in integral calculation with a user interface using a block diagram and a one-line diagram. Consequently, new power system components such as FACTS equipment can be easily modeled. This paper also evaluates the validation of the developed tool based on studies on (1) frequency regulation by water heaters, and (2) stabilization using an adjustable speed machine (ASM). XADVANCE is shown to be effective in analyzing the dynamics of complex power systems including advanced equipment.