DESIGN OF TRANSIENT SENSOR OF EARTH VOLTAGE FOR PARTIAL DISCHARGE MEASUREMENT

• Main Author: TRI LAKSONO , DEDI
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/26457
• Institution: Institut Teknologi Bandung

This thesis research discusses the measurement of Partial Discharge (PD) on metal-enclosed electrical equipment. The use of a 50x50x50 cm3 metal box from aluminum as a modeling of electrical equipment. The intended electrical equipment such as power switchgear, Gas Insulated Switchgear (GIS). The purpose of selecting research on electrical equipment is the important role of power switchgear in the flow of electricity supply. The initial symptoms of failure of high voltage electrical insulation one of which is marked by the Partial Discharge (PD) event. Therefore, an early detection method for PD is needed. In this study using a Transient Earth Voltage sensor (TEV) which has the advantage of being able to detect on-line conditions or without the need to turn off the system. Additional sensors namely the RC detector as a comparison. The purpose of this study was to determine the differences in PD characteristics on TEV handmade 3x3 cm sensors, TEV handmade 4x4 cm. In addition, to determine the effect of TEV sensor placement. The reference for placing the TEV sensor is at the midpoint of the bushing. This is because the bushing is the biggest gap or hole in the metal box. The TEV sensor placement in this study was determined in three points, namely the distance of 15 cm, 30 cm, and 45 cm from the bushing. <br /> <br /> <br /> PD characteristic measurements in the form of background noise (BGN) measurements, PD Inseption Voltage, PD waveforms, and phase patterns. The next calculation is to find out the frequency range of the sensor. The PD source is the air isolation medium, the plate needle electrode. The PD source is placed in a metal box with a gap or needle distance with a plate that is 1.5 cm. All measurements are carried out in the High-Flow High Voltage Laboratory - ITB. <br /> <br /> <br /> The results of PD measurements on metal boxes indicate that the 4x4 cm and 3x3 cm TEV handmade sensors are capable of measuring PD in the frequency range 1 - 125 MHz. TEV handmade 4x4 cm sensor is better than TEV hanmade 3x3 cm. Seen from the measurement results show PDIV value, PD wave, or frequency range is better. Although the value range is not large. TEV China has the best measurement quality. Even so, the range of measurement values is not too large with TE4 handmade 4x4 cm or handmade TEV 3x3 cm. <br />