Abstract—This paper endeavors to present a comprehensive
summary of the causes and effects of voltage unbalance and to
discuss related standards, definitions and mitigation techniques.
Several causes of voltage unbalance on the power system and
in industrial facilities are presented as well as the resulting
adverse effects on the system and on equipment such as induction
motors and power electronic converters and drives. Standards
addressing voltage unbalance are discussed and clarified, and
several mitigation techniques are suggested to correct voltage
unbalance problems. This paper makes apparent the importance
of identifying potential unbalance problems for the benefit of both
the utility and customer.