What is the significance of Contingency Weightage?
Contingency Weightage is used to increase the severity of given outage for a particular bus or line. Normally the weightage value is unity. However, if a particular bus voltage deviations should not occur for any outage, and even for small deviations, that outage need to be given higher ranking, then the bus weightage no. is given greater than unity say, 5. Then the voltage deviation is multiplied by 5 times, and hence the contingency ranking will go high. For 400 kV buses and buses connected to neighbouring grid, the weightage can generally be increased, then line weightage is given more than unity. For tie lines and important lines in the grid, which should never be overloaded, line weightage can be increased.
