Aims & Learning Objectives:
Aims: To provide a detailed understanding, in terms of application and operating principles, of the main types of fundamental power system plant items.
Objectives:
After successfully completing this unit students will be able to: Describe the basic properties and design principles of transformers, identify the operation and interconnections involved in transformers, list special features of transformers, calculate basic characteristics of cables, calculate temperature rises in cables in steady state and transient conditions, describe the mechanical and electrical design of HV and EHV transmission lines, describe the operation of electrical insulation, describe and analyse different methods of power system earthing.
Content:
Tramsformers: Design principles, transformer operation, three-phase transformers, auto-transformers, tap-changing transformers, instrument transformers; Cables: Losses in power cables, temperature rise in power cables; Transmission lines: Transmission line design considerations, transmission line design principles, electrical properties of transmission lines, High Voltage Direct Current (HVDC) transmission; Electrical insulation: Controlling electrical fields, electrical breakdown in gases, electrical breakdown in solids; System earthing: Definitions and methods of earthing, earthing equipment, power system voltages and currents during system disturbances, special systems, unbalanced star load in distribution systems, summary of established practice in power system earthing.
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