Study of Power Quality Problems for Improving the Quality of Electricity in Java: Case Study of East Java Regional Industry Customers with Power Greater Than 30 MVA

The reduction of electricity growth, especially in Java, has prompted PLN to improve its electricity sales business process toward power quality improvement by providing additional services to industrial customers. Improving the quality of the electric power supply will increase customer engagement and electricity consumption, especially for industrial segment (I-Class). This study used the recorded data from Power Quality Meter (PQM) in the Java Bali System to evaluate the power quality supplied by PLN based on the type of industrial cluster and customer location. The Information Technology Industry Council (ITIC) standard curve was used as a reference for evaluating PQM data. According to the year 2020 recorded data plot to the ITIC curve from 22 sample industry customer in East Java, it was found that 193 from the total of 1550 incidents were classified as failed condition. About 116 of them were classified as under or over voltage and interruption (long duration class), while the rest were classified as transient, sag, and swell (short duration class). Power quality problem for short duration class based on industrial type and location were dominated by instantaneous sag.