1. The document analyzes unsymmetrical faults using the bus impedance matrix method. It describes connecting sequence networks for positive, negative, and zero sequences for line-to-ground faults. 2. Current is injected into the faulted bus in each sequence network. Voltages are then calculated based on the impedances in the bus impedance matrices. 3. Post-fault voltages and currents can be determined for all buses to analyze the effects of unsymmetrical faults on the system.