The application of transportation techniques in modelling power pools

Abstract

The paper presents the application of transportation techniques to produce a topological network model for the transmission system of a power pool. The result, in turn, is used to create a transmission line flow model for use in generation dispatch, energy costing and various power system security functions. To produce the topological model, it is necessary to define all loops and electrical paths in a network. The use of transportation technique replaces the tedious and impractical hand calculation of such loops and paths and the total application results in a completely automatic network modelling package ideal for use in support of real time energy control systems. The networks of neighboring pools as well as pool members are each represented as unique areas. The topological model defines the interconnections between the network areas and requires: 1. (1) All paths of circulating current flowing between network areas. A matrix technique is used to determine circulation paths. 2. (2) All paths of sneak current flowing through the various network areas. A transportation technique is used to determine sneak paths. 3. (3) All paths of interchange current flowing between network areas. A transportation technique is used to determine interchange paths. The sneak current flows follow a loop pattern which are determined and accommodated by allocating such loops on a transportation matrix simulating the various areas as sources and destinations. The interchange current flows follow arbitrary open paths which are determined by selecting the shortest paths between one area as a source and another area as a destination. The final network modelling package, which includes the above application, is presently employed by the New York Power Pool in a real time environment for modelling the Pool's transmission network.