High Voltage Engineering

Objective & Out come of learning.

To review the breakdown phenomena in insulating materials and to impart advanced knowledge regarding the Generation of High Voltage & Currents for the equipment testing and corresponding measurements. It also includes the problem of insulation coordination. At the end of the course a student may be ready to handle the testing in HV Labs.

1. Breakdown Phenomena :

Basic processes of breakdown, breakdown phenomena in gaseous, liquid, solid composite dielectrics, Breakdown in vacuum insulation.

2. Generation of Test High Voltages :

Generation of high d.c. voltage by voltage multiplier circuit and electrostatic generators, generation of high a.c. voltage by cascaded transformers and resonant transformers, generation of impulse voltage, triggering and synchronization of impulse generator, generation of high impulse current.

3. Measurement of High Voltage and Current :

Resistance, capacitance and R-C potential dividers, sphere gap, electrostatic voltmeter, generating voltmeter, impulse voltage measurement, measurement of high d.c. a.c. and impulse currents.

4. High Voltage Testing :

Requirement of high voltage test circuit I.S. specifications, impulse and power frequency tests of transformers, lighting arresters, bushings, Power cables, circuit breakers and isolators ; measurement of resistivity, dielectric constant and loss factor ; partial discharge measurement.

5. Over Voltage Phenomenon and Insulation Coordination :

Lightning and switching phenomena as causes of over voltages, protection of transmission line and substation against overvoltage, insulation coordination.

References

1. E. Kuffel W.S. Zaongol, High Voltage Engineering Pergaman Press