Keywords: power flow tracing, transmission loss allocation, open access transmission, deregulation, loop flows
A new method for accommodating loop flows during transmission loss allocation
This paper presents a new method for accommodating loop flow in the process of transmission loss allocation including a generalised model for the transmission line. The developed line model is similar to the generalised circuit model based on the famous ABCD parameters. The proposed model enables unbundling the active power loss allocated to a node into two components; the first is the loss due to active power flow and the second is the loss due to reactive power flow. The same is done for the reactive power loss. Such separation of loss components makes loss allocation more transparent and explainable. In the presence of a loop flow, the power flow tracing algorithm gets faced with some nodes remaining in the system where no one of it is a pure sink node and hence gets stuck. The paper describes a method for loss allocation in the presence of loop flows based on signal flow graph manipulation techniques.