Dynamic Performance of a Radial Weak Power System with Multiple Static VAR Compensators

This paper deals with the dynamic performance of a radial weak, heavily shunt compensated power system, with three Static Var Compensators (SVCs) of relatively large rating, installed at short distances from each other. Dynamic interactions between the SVCs control systems and between them and the network are analysed by using eigenvalues and frequency response techniques. Some noteworthy effects concerning the SVCs´ regulators´ stability, that may arise in such systems, are here described. These effects, revealed in the eigenvalue analysis, were confirmed in TNA simulations. A brief description of the mathematical formulation and the complete system data are also included.