Challenges in distribution system analysis

Summary form only given. The author describes how, although distribution systems have relatively simpler radial structures, their modeling and analysis pose various challenges, due mainly to the following reasons: (1) system: distribution systems usually consist of line sections that are of different phases; the laterals, for example, can be single or two phase, while the main feeder is usually three phase; (2) load distribution: load distribution over a distribution feeder is inherently unbalanced, due mainly the predominant use of single-phase distribution transformers to supply the load; and (3) data: distribution systems are designed to operate without much monitoring and control