New Techniques for Prevention of Power System Collapse

Abstract

There is an international trend to increase the power transmit limit in the network and to increase the competence of existing power plants. From voltage stability point of analysis, upper limit acceptable loading limits must not be exceeded in the operation of power systems. The risk of cascading outages in power systems manifests itself in a number of ways. Electric power systems are increasingly being operated close to their limits. When a power system is subjected to large disturbances control actions need to be taken to turn the system away from severe consequences and to limit the extent of the disturbance. This instability often results in voltage collapse of the system, which in turn causes massive losses in the system as well as monetary losses. This paper deals with some newer techniques for the prevention of the voltage system collapse for voltage system collapse, which may have a very large monetary impact on the society. Key Words: Voltage stability, voltage collapse, power system