STATIC VAR COMPENSATOR PROTECTION

Static VAR compensator (SVC) protection practices are presented, Prote ction schemes comprise a combination of conventional protective relays as well as protection functions performed by the control system. This paper describes different protection functions applicable to SVCs and includes a tabulated overview of possible SVC protection methods. A s ection is dedicated to testing SVC protection systems. The outlined te st procedures maybe adopted when commissioning new installations in or der to demonstrate proper protection operation. Finally, an important aspect of SVC protective schemes is related to the interactions with t ransient overvoltages, harmonics, short-circuits, and geomagnetic indu ced current (GICs) of the transmission network. This paper discusses t hese issues and identifies areas where careful protection consideratio ns are required.