CONTRIBUTIONS OF INDIVIDUAL GENERATORS TO LOADS AND FLOWS

Because of the introduction of competition in the electricity supply i ndustry, it has become much more important to be able to determine whi ch generators are supplying a particular load, how much use each gener ator is making of a transmission line and what is each generator's con tribution to the system losses. This paper describes a technique for a nswering these questions which is not limited to incremental changes a nd which is applicable to both active and reactive power. Starting fro m a power flow solution, the technique first identifies the busses whi ch are reached by power produced by each generator. Then it determines the sets of busses supplied by the same generators. Using a proportio nality assumption, it is then possible to calculate the contribution o f each generator to the loads and flows. The applicability of the prop osed technique is demonstrated using a 30-bus example.