where Be is the total susceptance, α is firing angle of thyristor, XL is inductance, XC is
capacitance, I is injected current, Vi is terminal voltage of SVC. Equation (2.20) can be
introduced into the power flow equation in the CPF process. It represents limits not only
on the firing angle α, but also on the current I, the control voltage V and the SVC voltage
Vi as well as the reactive power Q.