A Vector Energy Function Approach for Security Analysis of Ac/Dc Systems

Abstract:

This paper examines dynamic behavior in system models that reflect reasonably detailed (third order) HVDC dynamics along with ac system models that include reactive flows, and frequency and voltage dependent load models. a vector Lyapunov function approach is employed to define a system wide energy function that can be used for general security analysis. the paper describes the derivation of individual component Lyapunov functions for simplified models of HVDC links connected to “infinitely strong” ac systems, along with a standard ac only system Lyapunov function. a novel method of obtaining weighting coefficients to sum these components for the overall system energy function is proposed. Use of the new energy function for transient stability and security analysis is illustrated in a test system. © 1992 IEEE

Año de publicación:

1992

Keywords:

• dynamic security assessment
• transient energy functions
• Transient Stability
• HVDC
• Lyapunov functions

Fuente:

scopus