Power System Scenario Analysis

While monitoring the prevailing operating conditions, an operator is constantly presented with situations in which he needs to make a decision on his next move. As part of the system operating order or process book, utilities document closely what the operational limits and thresholds are for their major substations, transmission lines, and transformers. They also document broadly the type of mitigating actions operators need to take to return the system to within these operating limits so as to remove problems such as voltage and power flow violations. The decision support system required for power system control includes the infrastructure to perform switching actions and a tool for scenario analysis. Different assumptions and specifications regarding the controls in a power flow can be used to represent different scenarios of the system. These scenarios include prefault and postfault system conditions.