Unbalance in power systems: Case study

Abstract

This paper presents a literature review about unbalance in power systems and a case study about unbalance measurements in the Main Interconnected Network (MIS) of Oman. A review of unbalance causes, negative impacts, mitigation techniques, quantification indices and limits are presented. Moreover, voltage and current unbalance measurements at three grid stations that supply the three main industrial areas located in the MIS of Oman are conducted. Measurement results are compared with limits specified by national and international standards.