This is an simple Radial system Newton Raphson load flow Analysis.
In this propgram, three test systems are considered, one is 5-bus system (from stagg book), 33-bus radial distribution system and 69-bus radial bus distribution system.
All details regarding, how to obtain the solution for various test systems are described in Instruction.doc file.
Please have a look over it. Queries / Corrections are always welcome.