Temperature Monitoring Operation for Medium Voltage Switchgear by Using Thermal Sensor and Partial Discharge Aler by using Radio Frequency at CPP Gundih Pertamina EP Cepu Field

Abstract

CPP Gundih is one of the Central Processing Plant which operated in Pertamina EP Asset 4 – Field Cepu. Electrical power supplied by Gas Turbine Generator (GTG) which distribute by using Medium Voltage Switchgear. During operation, operator or technician cannot measure temperature operation inside switchgear. Temperature inside switchgear should be known for analyze, is there any abnormal for each installation which have potency for failure operation.

If we use Temperature Gun, we cannot measure data of temperature because thickness of panel is thick. By using Temperature Sensor directly on the circuit breaker arms, cable connection bus bar, we can measure temperature operation during Medium Voltage operation with real time condition and directly.

Other side, if there are abnormal condition especially about Partial Discharge condition. Partial Discharge is an electrical  ischarge or spark that bridges a small portion of the insulation between two conducting electrodes. Partial Discharge can happen at any point in the insulation system, where the electric field strength exceeds the breakdown strength of that portion of the insulating material. Partial Discharge can occur across the surface of insulating material (mainly due to contaminants or irregularities), within gas bubbles in liquid insulation, in voids within solid insulation or around an electrode in gas (corona activity). By using Ultra High Frequency (UHF) antennas, we can measure the wave of Partial Discharge effect and monitor by graphic chart for real time condition. After get the data, we can analyze and can prevent un-planned shut down by Partial Discharge Effect. So, we can do Predictive Maintenance and eliminate failure potency at CPP Gundih.