Abstract:
In the past many wide spread blackouts have been occurred in interconnected power systems du to transient state of power system insecurity such as outages and cascade outages which may lead to complete blackout. The contingency analysis is used to predict which contingencies make system violations and rank the contingencies according to their relative severity. Contingency Analysis is useful both in the network design stages and for programmed maintenance or network expansion works to detect network weakness. Contingency analysis is a well-known function in modern energy management systems, the goal of this power system analysis function is to give operator information about the static security. Contingency analysis of a power system is a major activity in power system planning and operation, in general an outage of a transmission line or transformer may lead to overloads in other branches or a sudden system voltage rise or drop. Contingency analysis is used to calculate violation.
In this project the contingency analysis is done to Sudanese National Grid (SNG) as case study to determine and analyze the effect of equipment outage for a single outage (N-1) on bus voltage profile and rank the most severe equipment affect the voltage profile according to Bus Voltage Security Index (PIV / Vsp) descending ranking. Static var compensator is used to decrease the voltage violation during outages and it gave better results.
