Dynamic VAR Compensator (DVC) Application in Landsnet Grid, Iceland

FACTS (flexible AC transmission system) devices such as static compensators (STATCOMs) have long been used to solve utility voltage problems. Generally these have been on large-scale installations on interconnected systems providing economies of scale benefits for the utilities. STATCOMs, similar to static VAr compensators (SVCs), have proved to be just as useful for utilities in addressing a wider array of problems-from voltage regulation of weak transmission systems to multiple just-in-time installations to prevent voltage collapse and improve system stability and reliability. Landsnet, an independent transmission owner in Iceland is in the process of installing a +40/-40 MVar DVC dynamic VAr compensator, which is a hybrid between a STATCOM and SVC at Hryggstekkur 132 kV substation in eastern Iceland. This paper outlines the system requirements, analysis, procurement and installation of the DVC system at Hryggstekkur which is planned for installation in fall of 2006