Analysis of losses in interconnected systems [includes discussion]

The advantages of the method to be described in this paper are the following: 1. In the preparation of transmission loss tables for future transactions between interconnected companies, only the total interchange from one company to another usually is known while the amount of power flowing over each individual tie line generally is unknown. The method to be described requires only a knowledge of the total interchange of power from one company to another and the generation in each company and does not require that the power flowing over each individual tie line be known. 2. It is sometimes found that the representation of a group of interconnected companies may require more units than are available on a given analyzer. In the method to be described, each company may be studied individually, and transmission loss formulas for each individual company determined as described by G. Kron' and by L.K. Kirchmayer and G.W. Stagg. Transmission loss formulas for any desired radial interconnection of these individual companies are determined by operating on the loss formulas of the individual companies as described. 3. In the method to be presented, the loads in the individual companies may vary independently of each other. 4. The calculations and network analyzer measurements involved in determining a total loss formula for a group of interconnected companies are decreased by application of the methods described in this paper. A detailed theoretical development of these methods is given in the companion paper by G. Kron.