A System Approach to Inductive Coordination

Physical parallels of transmission lines with communication circuits and railroad signal circuits cause induced voltages which may interfere with normal operation. Due to the demand for more efficient uses of existing rights-of-way, and to the trend toward higher line currents and voltages, such parallel problems will become more frequent and more difficult. This paper recommends a system approach to the problem in which candid discussion, mutual understanding and a willingness to adopt new techniques can benefit both utilities. New limits are discussed, new computational techniques mentioned, and the general subject of inductive coordination is covered. Shielding, protection systems and substation problems are examined.