Voltage stability analysis

Voltage stability analysis module

P-V analysis approach

The module uses a comprehensive P-V voltage stability study analysis approach for the base case and for any possible contingency against which the voltage stability of the system is to be evaluated.

This is achieved by scaling up all the loads in user-defined steps for a given network, base case and all defined contingencies, either by bus, areas, zones or globally. The steady-state P-V approach dictates that for each load increase, pertinent generators within the system should be re-dispatched to match this load increase.

Three methods of generation re-dispatch are available:

• Uniform generation
• Inertial power flow
• Governor response

The load flow is solved for each load profile while monitoring the bus voltages over a range of variation of the key system parameter, which is the load for the P-V voltage stability analysis techniques. Reactive power of a defined group of generators, reactive power reserve and interface flow can also be monitored and reported.