Title :
A vector energy function approach for security analysis of AC/DC systems
Author :
DeMarco, Christopher L. ; Cañizares, Claudio A.
Author_Institution :
Dept. of Comput. & Electr. Eng., Wisconsin Univ., Madison, WI, USA
fDate :
8/1/1992 12:00:00 AM
Abstract :
The authors examine dynamic behavior in system models that reflect reasonably detailed third-order high-voltage DC (HVDC) dynamics along with AC system models that include reactive flows, and frequency and voltage-dependent load models. A vector Lyapunov function approach is used to define a system-wide energy function that can be used for general security analysis. They describe 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 was illustrated in a test system
Keywords :
DC power transmission; power systems; AC/DC systems; HVDC dynamics; dynamic behavior; frequency; reactive flows; security analysis; system-wide energy function; transient stability; vector Lyapunov function approach; vector energy function; voltage-dependent load; Frequency; HVDC transmission; Load flow analysis; Load modeling; Lyapunov method; Security; Stability analysis; System testing; Transient analysis; Voltage;
Journal_Title :
Power Systems, IEEE Transactions on