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Voltage and frequency control of parallel operated synchronous generator and induction generator with STATCOM in micro hydro scheme

Voltage and frequency control of parallel operated synchronous generator and induction generator with STATCOM in micro hydro scheme

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  • Author(s): I. Tamrakar 1 ; L.B. Shilpakar 2 ; B.G. Fernandes 3 ; R. Nilsen 4
    • View affiliations
    • Affiliations: 1: Department of Electrical Engineering, Institute of Engineering, TU, Nepal
      2: Nepal Electricity Authority, Institute of Engineering, TU, Nepal
      3: Department of Electrical Engineering, Indian Institute of Technology Bombay, Mumbai, India
      4: Department of Electrical Power Engineering, NTNU, Norway
  • Source: Volume 1, Issue 5, September 2007, p. 743 – 750
    DOI:  10.1049/iet-gtd:20060385 , Print ISSN 1751-8687, Online ISSN 1751-8695
© The Institution of Engineering and Technology
Published

Parallel operation of synchronous and induction generators in micro hydro scheme is presented. The synchronous generator has an exciter, which provides a fixed excitation to produce normal rated terminal voltage at full resistive load. On the other hand, the induction generator has neither exciter nor speed controller. Static compensator (STATCOM) is connected to the common bus for terminal voltage and frequency control. A resistive dump load is connected across the DC link capacitor of STATCOM through a chopper to control active power. Simulink model is developed to perform transient analysis of the proposed scheme. Experimental results are presented to compare with the simulation results. It is found that connection of an induction generator in parallel with the synchronous is much simpler than connecting two synchronous generators in parallel.

Inspec keywords: asynchronous generators; power control; power capacitors; hydroelectric power stations; voltage control; static VAr compensators; machine control; frequency control; synchronous generators; transient analysis; power generation control

Other keywords: chopper; STATCOM; resistive dump load; transient analysis; exciter; parallel operated synchronous generator; frequency control; parallel operated induction generator; Simulink model; voltage control; static compensator; micro hydro scheme; active power control; DC link capacitor

Subjects: Synchronous machines; Other power apparatus and electric machines; Voltage control; Frequency control; Power and energy control; Hydroelectric power stations and plants; Control of electric power systems; Power system control; Asynchronous machines

References

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      • Freitas, W., Asada, E., Morelato, A., Xu, W.: `Dynamic improvement of induction generator connected to distribution system using a DSTATCOM', Proc. Power Con. 2002, Int. Conf., 13–17 October 2002, 1, p. 173–177, Power System Technology, 2202.
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      • Chakraborty, C., Das, S.P., Bhadra, S.N.: `Some studies on the parallel operation of self excited induction generators', Proc. of the Int. Conf. on Energy Conversion, 1993, p. 361–366.
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      • Jayaramaiah, G.V., Fernandes, B.G.: `Analysis of voltage regulator for a 3-phase self-excited induction generator using current controlled voltage source inverter', Proc. on First Int. Conf. on Power Electronics System and Application 2004, 9–11 November 2004, p. 102–106.
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