I want to use the MATPOWER for load flow analysis of the practical radial distribution system. In the system two voltage levels are there. First is 11 kV bus (Bus 1) which is slack bus. All other buses are of 440V bus. There is a transformer of 11kV/440V between bus 1 and 2. >From bus 2 onwards are load bus. At some buses load is present at some buses no load is present. I know the values of R and X of line in ohm. How to perform the load flow analysis of this system having two voltage levels with transformer? How to proceed.
I am able to perform the load flow analysis of the system from 440V and downstream buses i.e. with one voltage level. I am facing the problem when I make bus 1 as slack bus with 11 kV. When I have added the 11 kV line and performed the load flow total losses are less than that of load flow when only 440V line and downstream loads are present. I am not getting what is wrong. Please help. Thank you.
