Experimental design for a large power system vulnerability estimation

This paper proposes a reliable experiment design for large power system vulnerability estimation. Assuming that in most cases security problems result in voltage instabilities, a strategy that allows a voltage collapse proximity estimation, known as vulnerability, is proposed. The premise is that power flow calculation is not required for vulnerability estimation, requiring only the bus voltage measurements; the approach is a promising tool for on-line implementation. The result is a model based on statistical techniques that analyze databases previously built, that contains voltage profiles for different contingencies and the corresponding calculated value for the Voltage Collapse Proximity Index (VCPI).