Development of equipment models for fast distribution three-phase unbalanced load flow calculation

This paper presents distribution system equipment models for fast distribution three-phase unbalanced load flow calculation. Recently, the number of distributed generators introduced into distribution systems has been increasing and detailed system analysis using load flow calculation has been eagerly awaited. Moreover, since many distribution system loads are composed of single phase loads, three-phase unbalanced load flow calculation is required for the distribution system analysis.,Although the fast distribution three-phase unbalanced load flow calculation has been developed, equipment models considering interconnection of distributed generators have not as yet been developed in Japan. This paper develops practical equipment models such as various distributed generators, voltage control equipment, and loads for fast three-phase unbalanced load flow calculation in distribution systems. The feasibility of the developed models is verified and demonstrated on practical distribution system models with promising results. (C) 2002 Wiley Periodicals, Inc.