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NPTEL Syllabus

Power Electronics Applications to PowerSystems - Video course

COURSE OUTLINE 

Part I:Load Balancing: Introduction-brief discussions on Transmission l ine theory,use of Voltage source inverter (VSI) for reactive power support, mid-point seriesand shunt compensation and HVDC.

Discussion on voltage profile at the point of common coupling (PCC), need forload compensation, load balancing using passive elements.

Limitations of load balancing using passive elements, Use of VSI as a Vargenerator, Indirect current controlled synchronous link converter VarCompensator (SLCVC).

Var ious PWM techniques: Harmonic Elimination and space vector PWMtechniques - Theory and implementation issues.

Discussion on bi-directional power flow in VSI, Use of VSI as active filter cumVar generator, Current controlled SLCVC, Strategy-1: Sensing the compensatorcurrent, Strategy-2: Sensing the source current, Use of two VSIs, one as Vargenerator and another as active fil ter.

Limitations of 2-level VSI, Discussion on the need for the change in power circuitconfiguration of 2-level VSI for high power application, introduction to multi-levelinverters. Principle of operation of 3-level and 4-level diode clamped multi-levelinverters. Space vector representation of 3-level VSI, voltage control of 3-levelinverter.

Instantaneous reactive power theory, expression for active and reactive powersin terms of d-q components. Reactive power compensator using instantaneousreactive power theory, stationary to rotating frame transformation. Reference  wave generation (hardware method), harmonic oscillator, Phase locked loop(PLL) Introduction on one cycle control, discussion on one cycle controlled Vargenerator and active filter.

Part II:Shunt Compensation: Introduction, methods of Var generation: Thyristorcontrolled reactor (TCR), Thyristor switched capacitor (TSC), Fixed capacitor-Thyristor controlled reactor (FC-TCR), STATCOM.

Part III:

Series Compensation: Introduction, comparison between series and shuntcompensation. Various Equipment: GTO Controlled Series Capacitor (GCSC),Comparison of TCR and GCSC, Thyristor Switched Series Capacitor (TSSC),Thyristor Controlled Series Capacitor (TCSC). Static Synchronous SeriesCompensator (SSSC), modes of operation, Voltage regulator and Phase AngleRegulator (PAR).

Mu l ti functional FACTS controller: Unified Power Flow Controller (UPFC),control capabilities of UPFC, 2-port representation of UPFC.

Part IV:HVDC: Introduction, various possible HVDC configurations, unipolar and bipolarlinks, components of HVDC system: Converter, transformer, smoothing reactor,harmonic filter. Reactive power support, operation of 6-pulse controlled rectifier

in inverting mode of operation. Effect of source inductance, equivalent circuitrepresentation of 6-pulse converter considering effect of source inductance.Operation of 12- pulse converter.

Control of HVDC system, Rectifier and inverter characteristics, modestabilization, current control, voltage dependent current order limit, combined

NPTELhttp://nptel.iitm.ac.in

ElectricalEngineering

 

Pre-requisites:

1. Course on Power Electronics(including operation of 3 phaseAC-DC conversion, limitationsof line commutated converter,DC-AC converter, Voltage controlof VSI).

2. Basic course on Control theory.

3. First course on Power Systems (

Transmission line theory).

Coordinators:

Prof. B.G. FernandesDepartment of ElectricalEngineeringIIT Bombay

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rectifier-inverter characteristics, valve blocking and by-passing, limitationsHVDC system using line commutated converters, modern HVDC system -HVDC light. 

References:

1. T. J. E. Miller “Reactive power control in Electrical system,” John Wiley &

Sons, New York, 1982.

2. K. R. Padiyar “FACTS CONTROLLERS in Power Transmission &Distribution,” New Age International (P) Ltd.,” 2007.

3. K. R. Padiyar “HVDC POWER TRANSMISSION SYSTEMS Technologyand System Interactions,” New Age International (P) Ltd.,” 1990.

4. Hingorani N. G “Understanding FACTS Concepts & Technology ofFACTS Systems,” IEEE PRESS, 2000.

A joint venture by IISc and IITs, funded by MHRD, Govt of India http://nptel.iitm.ac.in