ABSTRACT

Fanny Jouke Doringin, An Automatic Load Balancing System for the Three-Phase Electrical Power Distribution System (supervised by Zahir Zainuddin and Rhiza S. Sadjad)

This is a design project to develop an automatic load balancing system for the low voltage (380/220 V) electrical power distribution system.  It is a well known fact that balancing a three-phase utility system can optimize the power flow and reduce the power losses (Ploss), so at the end can increase the electrical power company's profit margin and efficiency.

A micro controller-based control system is proposed in this research project to redistribute the unbalanced current of each phase automatically to other two phases in such a way so that at the end the current of all three phases are distributed as equally as possible. A simple binary logic is applied to the control algorithm.

The system has been implemented successfully in a simulation of a three phase low voltage 380/220 V distribution system and in an actual case of eight-story hotel building. In the actual case of eight-story hotel building, at every floor the electricity power is distributed equally to all rooms, so that if more rooms supplied by one phase are occupied, then the system automatically re-distributes the power to the other two phases. The unbalanced distribution of phase R = ….... Ampere, S = …... Ampere and T = …..... Ampere at the third floor, for instance, is re-distributed by the system automatically into phase R = …..... Ampere, S = …..... Ampere and T = …....... Ampere.