Eq 4 represents the zero-sequence current of the capacitor which consists of two terms the first is a steady-state term and the second is the transient pulse zero-sequence current term Eq 3 describes

Together, Eqs. (3) and (4) provide a complete description of the zero-sequence current behavior in the system. The steady-state term in Eq. (4) represents the current that flows through the capacitor due to the presence of a neutral-to-ground voltage, while the transient pulse term represents the current that flows through the capacitor in response to a sudden change in the system.

Eq. (3) provides information about the distribution of the zero-sequence current in the system, and can be used to identify any branches that have a high zero-sequence current. This information is useful for identifying potential problems in the system, such as ground faults or other issues that can cause excessive zero-sequence currents.

Overall, understanding the behavior of zero-sequence currents in power systems is important for ensuring the safe and efficient operation of the system. By analyzing the distribution and characteristics of zero-sequence currents, engineers can identify potential problems and take steps to mitigate them, improving the reliability and stability of the power system.