Congestion management allocation in multiple transaction networks

We present a physical-flow-based congestion management allocation mechanism for multiple transaction networks. We use the multiple transaction network framework we constructed in earlier (see IEEE Trans. Power Syst., vol.15, no.2, p.631-7, 2000) to characterize transmission congestion and then determine the contribution to congestion attributable to each transaction on a physical-flow basis. We present an adjustment auction-based congestion relief mechanism that enables the Independent Grid Operator (IGO) to acquire relief services to remove the overload congestion attributed to each transaction from the network in the most economic manner. This congestion relief scheme determines the nondiscriminatory transmission charges for each transaction´s usage of the network. We illustrate the workings of the proposed scheme using the IEEE 57-bus system and discuss the policy implications of the congestion relief and allocation solution.