Load Ratio to Line Flows to Estimate Congestion Costs for Customers in a Restructured Power Grid

Abstract

During the last decade of the 20^th century, there was a global trend to deregulate the power sector. However, with the deregulation of the power system, operations of the power system tend to become more complex. In a deregulated power system, due to the operation and thermal limits of the line, cheaper generators are not utilized to dispatch the load at all times. Hence there is an increase in the cost of the energy produced. This increased cost is identified as congestion cost. Determination of congestion cost and distribution among all the participants is a crucial issue in the deregulated power system. For proper allocation of congestion cost, it is required to evaluate the share of load to the line flows. Here in this paper load share to the line flow is determined by using Bialek’s algorithm. Using Bialek’s downstream algorithm a method is developed to identify load share to the line flows. Standard test systems are used to get the results of this method.