Analysis of three-phase parallel distribution feeders fed from different substations

The paper addresses the issues regarding paralleling distribution feeders in the environment of automated distribution operations coordinated with transmission operations. The presented methodology for solving operational problems related to feeder paralleling is based on the method of compensation technique applied for solving three-phase weakly meshed distribution systems with multiple sources. This method provides reliable and fast convergence of load flow calculations and can be used for different tasks in both weakly meshed transmission and distribution systems. The method best fits for modeling three-phase unbalanced distribution systems. The paper describes how the method can be applied for analysis of parallel distribution feeders fed from different substations. The paper presents an effective algorithm for analysis of critical operational parameters of parallel feeders. Based on numerical examples of a real distribution system, the paper illustrates the relationships between operational parameters relevant to feeder paralleling.