8) Essential Knowledge and Associated Skills (EKAS): This describes the essential skills and knowledge and their level, required for this unit. Evidence shall show that knowledge has been acquired of maintaining network protection and control systems (complex). All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies. KS01-TTS35A Complex network protection and control systems Evidence shall show an understanding of complex network protection and control systems to an extent indicated by the following aspects: T1 Principles of power transformer construction and operations encompassing: Applications of static reactive plant in high voltage networks, including voltage control, VAR control, transient response capacity Types of static reactive plant including high voltage capacitors, high voltage reactors, static VAR compensators and combinations of these Operating characteristics and operational constraints including point on wave switching issues Ratings, cooling systems and control systems and ancillary equipment used Configurations and system layout including single star, double star, bridge type Typical protection systems used including neutral unbalance current, neutral unbalance voltage Techniques used when balancing elements within static reactive plant Safety precautions when testing and maintaining high voltage static reactive plant - safe working practices and procedures, identification of hazards, assessment and control of OHS risks, types, selection, maintenance and use of personal protective equipment. T2 Detailed operation of complex protection systems encompassing: Distance - characteristics, electromechanical, electronic, impedance, mho, offset mho, switched schemes, non-switched schemes, blocking schemes, bus zone Differential, transformer differential, bus overcurrent - principles, feeder protection, transformer protection, bias systems, harmonic restraint, CT connections, bus protection, low impedance schemes, high impedance schemes, bus overcurrent schemes, generator protection, CT connections, special considerations, digital systems Types of revenue metering Applications of SCADA Complex protection systems for communications Harmonic control Point on wave switching. |