Events

Introduction Characterisation of Electric Power Quality: Transients, short duration and long duration voltage variations, Voltage imbalance, waveform distortion, Voltage fluctuations, Power frequency variation, Power acceptability curves power quality problems: poor load power factor, Non linear and unbalanced loads, DC offset in loads, Notching in load voltage, Disturbance in supply voltage Power quality standards. Non-Linear Loads Single phase static and rotating AC/DC converters, Three phase static AC/DC converters, Battery chargers, Arc furnaces, Fluorescent lighting, pulse modulated devices, Adjustable speed drives. Measurement and analysis methods, Voltage, Current, Power and Energy measurements, power factor measurements and definitions, event recorders, Measurement Error Analysis: Analysis in the periodic steady state, Time domain methods, Frequency domain methods: Laplace, Fourier and Hartley transform The Walsh Transform Wavelet Transform. Analysis of power outages, Analysis of unbalance: Symmetrical components of phasor quantities, Instantaneous symmetrical components, Instantaneous real and reactive powers, Analysis of distortion: Online extraction of fundamental sequence components from measured samples Harmonic indices Analysis of voltage sag: Detorit Edison sag score, Voltage sag energy, Voltage Sag Lost Energy Index (VSLEI)- Analysis of voltage flicker, Reduced duration and customer impact of outages, Classical load balancing problem: Open loop balancing, Closed loop balancing, current balancing, Harmonic reduction, Voltage sag reduction. Power quality improvement Utility-Customer interface Harmonic filters: passive, Active and hybrid filters Custom power devices: Network reconfiguring Devices, Load compensation using DSTATCOM, Voltage regulation using DSTATCOM, protecting sensitive loads using DVR, UPQC control strategies: P-Q theory, Synchronous detection method Custom power park Status of application of custom power devices.