A new method for power loss allocation by modified Y-Bus matrix

This paper proposes a new method to allocate the power loss for transmission systems. The approach method is developed based on the basic circuit theories, equivalent current injection and bus equivalent admittance. For a given power-flow solution, the relationship between the branch currents and the load/generator voltage is determined using a modified bus admittance matrix, which allows the power loss of each transmission line to be expressed in terms of load/generator voltage. An example, with a six-bus system illustrates the proposed allocation strategy. Test result show that the proposed method can satisfy the power flow equation and basic circuit theories. Comparisons with previous methods are also provided to demonstrate the contributions of the proposed method.