Preventing voltage collapse by large SVCs at power system faults

摘要

This paper shows how the performance of a power grid in Saudi Arabia is improved by using SVCs to reduce the risk for voltage collapse at short circuits. Full SVCs capacity is needed during faults and for a short time following fault clearing for system recovery. It is shown that SVCs can handle the phase jumps at fault inception and clearing. The paper also deals with control stability for large SVCs in weak networks.