Voltage Stability of Received Power Grids with UHVDC Systems Under Different Initial States of Synchronous Condensers

This paper studies the influence of synchronous condensers under different initial reactive power states on system transient voltage stability in received power grids with ultra-high voltage direct current (UHVDC) systems. It is helpful for the synchronous condensers incorporating the system static voltage regulation. The voltage stability problem of an actual received power grid with an UHVDC system is introduced. And then, the voltage stability under different initial reactive power states of synchronous condensers and grid voltage control strategies are presented. The scenarios that the synchronous condensers can take part in the system static voltage regulation are summarized. At last, the static voltage regulation model of synchronous condensers is established with an objective function and sets of constraints. By using the actual power grid of UHVDC System, it is verified that the synchronous condenser can participate in the static voltage regulation in this scenarios, and the transient voltage stability of the system will not get worse.