Fundamental knowledge in field of measurements of electrical quantities in high voltage and power systems.
- distinguish measurement methods of electrical quantities in power systems
- define and measure characteristics of measuring transformers
- apply nonconventional methods in high current measurements
- produce reliable earth grounding systems
- identify breakdowns in power cables and lines
- identify the high voltage transformers and generators in laboratory and in service
- analyze the results of HV testing
- apply the data from lightning location systems
Forms of Teaching
The classes is organized in two teaching cycles. The first cycle consists of seven weeks of classes and exam, while second cycle includes six weeks of classes and a final exam. Teaching is carried out through a total 15 weeks with load of 2 hours.Experiments
Within the course, it will be shown a few demonstration exercises of the high voltages and current measurement.
|Type||Threshold||Percent of Grade||Threshold||Percent of Grade|
|Homeworks||0 %||20 %||0 %||20 %|
|Quizzes||0 %||20 %||0 %||20 %|
|Mid Term Exam: Written||0 %||30 %||0 %|
|Final Exam: Written||0 %||30 %|
|Exam: Written||0 %||30 %|
|Exam: Oral||30 %|
Week by Week Schedule
- Introduction Basic measurements of electrical quantities in power systems Measuring transformers
- Inductive voltage transformer, voltage and phase error Current transformer, current and phase error Types of measuring transformers
- Testing of magnetic properties of transformer core Measurement of power losses in transformer core and windings Partial discharge measurements
- Measurement of measuring transformer errors (compensatory and differential methods) Capacitance and loss factor measurements due to insulation characterisation
- DC Current transformer principle Transformers with compensated magnetic fluy (Hall sensor) Nonconventional current measurement transformer (Rogowski coil)
- Grounding systems Grounding resistance measurements methods (UI method, Behrend method, Nippold method) Soil resistivity measurements method
- Power cable fault diagnostic methods (Murray method, Varley method, Heinzelmann method) Fault location measurements (reflectometric method, induction method)
- Operation of the power system. High voltage transmission lines and isolation. Why high voltage (HV)? What is HV?
- Generation of HV AC? Generation of impulse voltages? Lightning location systems. Insulation coordination.
- Generation of HV AC in HV laboratory. Measurement of HV AC in switchgear. Measurement of HV AC in HV laboratory. Experiments in HV laboratory.
- Generation and measurement of impulse voltages. Impulse generator. Experiments in HV laboratory. Working principle of surge arresters.
- Testing with impulse currents. Impulse current generator. Shunts for impulse current measurements. Experiments in HV laboratory.
- HV DC. Generation. Measurement of HVDC. Experiments in HV laboratory.