To perform and analyze the DC (Linear) power flow method on a given power system network and study the angle and power flows under given loading conditions.
Introduction
Previous power flow (PF) model was alternating current power flow (ACPF). We can also formulate the PF equations using a DC power flow (DCPF). It is used in many types of power system studies as it is a good approximation to the ACPF and is much faster, easier to set up and solve.
Click here for the detailed theory explanation