A fast discrete method for voltage drop and current calculation for manufacturing facilities with intermittent loads

The author presents a numerical method of calculating voltage drops and thermal current ratings due to a large number of intermittent loads such as welders and robots. The welder and robot loads can have different currents and duty cycles and may connect at different points on a distribution network that is not necessarily radial. No lumping of welder loads is required. Regular loads such as motor loads and other process loads can also be represented simultaneously. The method can be easily extended to single-phase welders, i.e., for a three-phase distribution system analysis