Explicit Linear Model of Bus Impedance With Unknown Branch Status

This letter presents an accurate and explicit linear model of bus impedance for a power network with unknown branch status. Firstly, an equivalent network of the power network is constructed, and the relationship between bus voltage and bus impedance is established. Then, the linear expression of bus impedance with unknown branch status is built. This model can be easily included as constraints in various optimization problems with network topology adjustment involving short circuit calculation.