On-line voltage stability assessment considering uneven growth of regional load

An on-line voltage stability assessment algorithm is proposed based on the continuation power flow calculation,which considers the uneven growth of regional load and generation scheme.The load growth coefficient is deduced from the short-term regional load forecasts.With the consideration of different growth facts,the regional loads within 24 hours are predicted and the generation scheme is planned by the economic dispatch,based on which,the power-voltage curves and load margins are obtained by continuation power flow calculation.The simulation results for IEEE 118-bus system indicate the proposed algorithm on-line assesses the system voltage stability truly.