Syllabus

Distributed Generation (DG) - Overview and technology trends. Introduction to distribution systems. Radial distribution system protection: Fuse, circuit breakers, reclosers, sectionalizers. Per-unit analysis, fault analysis, sequence component analysis, sequence models of distribution system components. [6 hrs]

Implications of DG on distribution system protection coordination. Distribution system loading, line drop model, series voltage regulators and on line tap changers. Loop and secondary network distribution grids and impact of DG operation. Relaying and protection, distributed generation interconnection relaying, sensing using CTs and PTs. Islanding of distribution systems. Passive and active detection of unintentional islands, non-detection zones. [7 hrs]

DG planning, cost implications of power quality, cost of energy and net present value calculations and implications on power converter design. Power converter topologies and model and specifications for DG applications. Capacitor selection, choice of DC bus voltage, current ripple, capacitor aging and lifetime calculations. Switching versus average model of the power converter and EMI considerations in DG applications. Semiconductor device selection, device aging due to thermal cycling, and lifetime calculations. [8 hrs]

Issues in output ac filter design, filter inductor selection. Insulation aging issues. Packaging issues in the power converter. Calculation of damage due to thermal cycles. Thermal impedance models. Control of DG inverters, phase locked loops, current control and DC voltage control for standalone and grid parallel operations. Protection of the converter. [6 hrs]

Complex transfer functions, VSI admittance model in DG applications. Power quality implication, acceptable ranges of voltage and frequency, flicker, reactive power compensation, and active filtering and low voltage ride through requirements. [5 hrs]

Knowledge of the power converters and its impact on distributed energy sources on voltage control, power factor, power quality.

Know-how of recent trends in power electronic DG interconnection.

1. Able to understand the various challenges behind introducing distributed generation.
2. Able to design power converters for distributed generation systems.
3. Able to analyze issues related to AC filter, Insulation aging, packaging of power converter, thermal cycle.
4. Able model control techniques for DG inverters for grid synchronization and power control.
5. Able analyze power quality implications, reactive power compensation and voltage ride through requirement in DG system.

Arthur R. Bergen, Vijay Vittal, Power Systems Analysis, Prentice Hall , 1999

G. M. Masters, Renewable and Efficient Electric Power Systems, Wiley , 2013

Ali Keyhani, Mohammad N. Marwali, Min Dai, Integration of Green and Renewable Energy in Electric Power Systems, Wiley , 2010

Ned Mohan, Tore M. Undeland, William P. Robbins, Power Electronics Circuits, Devices, and Applications, Wiley , 2002