Redistribution of transmission loss based on Z-bus method

This paper presents a procedure for redistributing the Z-bus loss allocation in the open access transmission system. The proposed improvement not only identifies the contribution/attribution of the current flow between generation and load, but also figures out the responsibility of loss for each generator-load pair. The redistribution of the transmission loss based on Z-bus method can both closely reflect the relationship between generation and load and flexibly assign the loss to the selected bus. Moreover, the merits of the Z-bus loss allocation, depending on the network topology and the current injection, are all preserved. Finally, a 6-bus system is given to demonstrate the proposed method.