Damping of Low-Frequency Interarea Oscillations Using HVDC Modulation and SVC Voltage Support

This paper discusses the results of preliminary studies conducted to examine the applicability of high-voltage direct current (HVDC) technology and static Volt-Amp Reactive (VAR) compensation to aid damping of low-frequency interarea oscillations in the Mexican interconnected system (MIS). The study of interarea oscillations and the design of controls is done using modal analysis of a linearized AC/DC state space model of the power system at a particular operating point. The utilized methodology is tested on a planning model of the MIS that includes a proposed HVDC transmission system embedded in an AC network in which several SVCs are used for dynamic voltage support. Detailed time-domain analyses are performed to complement knowledge on the effect of FACTS technology on system transient behavior.