Var compensation enhancing interface power transmission

In the analysis of the interface transmission capability between local regions, the continuous power flow with interface power parameterization is adopted to study the affect of interface transmission power on system voltage stability. The optimal var compensation strategy is proposed to enhance the transmission capability and to ensure the normal system operation, which applies the interface power parameterization, instead of the node load parameterization, to re-design the continuous power flow- algorithm. The interface power transmission capability margin and the sensitivity information of weak bus are calculated by the continuous power flow algorithm, which are used as the constraints in optimization algorithm. The inner point optimization algorithm selects the weak bus as the installation node and takes the node voltage violation as the trigger to calculate the minimal var compensation. Simulation results show this strategy can enhance the interface transmission capability.