PROTOTYPE DESIGN OF AC HIGH VOLTAGE GENERATOR 275 KV WITH A SERIES RESONANT CIRCUIT METHOD

• Main Author: Ibrahim Safruddin, Anhar
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/51169
• Institution: Institut Teknologi Bandung

This research is focused on the design of high voltage generator based on variable frequency series resonant circuit. The resonant circuit consists of the resistance, inductance and capacitance values. Reactors have a reactance value just like a capacitor.. If in a series of two reactance values are the same, it will cancel each other out and resonance occurs. When there is resonance, the voltage across the capacitor and inductor will be very high. The so-called Q factor (or voltage gain) is about 20-40 times the supply voltage. Thus this circuit can be used for testing the high voltage withstand of electrical equipment to check whether the insulation is working effectively or not. The capacitance value comes from the electrical equipment to be tested so that a reactor with a design that can resonate with the test load is needed for the frequency range 50-300 Hz. The reactor design in this study is for the test load with a nanofarad capacitance value (based on the capacitance data of the 150 kV equipment). The test circuit is planned to use seven reactors arranged in series that can produce voltages up to 275 kV (for testing 150 kV equipment). One modular reactor has been designed using analytical calculations and with the aid of FEA software so that the specifications are obtained, the inductance value of 143.39 H and the Q factor of 30.67. A prototype of the reactor design has been implemented but with a lower specification than the original design plan. The measurment using the LCR meter obtained an inductance of 9.898 H with a theoretical Q factor of 22.87. The series resonant circuit prototype has been implemented using the reactor that has been made and the output voltage gain (Q factor) is obtained of 2.