An improved electronic load controller for self-excited induction generator in micro-Hydel applications

This paper describes the mathematical modelling of self-excited induction generators (SEIGs) with are improved electronic load controller (IELC) for microhydel applications supplying variety of loads. In small hydro plants, governor unit of turbine can be eliminated using IELC, which is simple and cost effective. The improved electronic load controller is a combination of a three-phase insulated gate bipolar transistor (IGBT) based current controlled voltage source inverter (CC-VSI) and a high frequency DC chopper which keeps the generated voltage and frequency constant in spite of change of balanced/unbalanced loads. A dynamic model of the SEIG- IELC supplying different types of loads using stationary d-q axes reference frame is developed for predicting the behavior of the system under transient conditions. The simulation is carried out for compensation of balanced/unbalanced loading conditions. The simulated results show that generated frequency and voltage remain constant with change in load. The proposed IELC acts as reactive power compensator, harmonic eliminator, load balancer and load controller.

[1]  Hirofumi Akagi,et al.  Instantaneous Reactive Power Compensators Comprising Switching Devices without Energy Storage Components , 1984, IEEE Transactions on Industry Applications.

[2]  J. Santana,et al.  Induction generator excited by current source inverter used as a DC power supply-modelling and behaviour , 1996, Proceedings of IEEE International Symposium on Industrial Electronics.

[3]  P. G. Holmes,et al.  Transient and steady-state load performance of a stand-alone self-excited induction generator , 1996 .

[4]  P. Vas,et al.  The analysis of a saturated self-excited asynchronous generator , 1991 .

[5]  F.M.M. Bassiouny,et al.  New approach to determine the critical capacitance for self-excited induction generators , 1998 .

[6]  Saad Alghuwainem.  Steady-state analysis of an isolated self-excited induction generator driven by regulated and unregulated turbine , 1999 .

[7]  R. Bonert,et al.  A technique for the steady-state analysis of a self-excited induction generator with variable speed , 1993 .

[8]  T. F. Chan,et al.  Capacitance requirements of self-excited induction generators , 1993 .

[9]  Jose Antenor Pomilio,et al.  Self-excited induction generator controlled by a VS-PWM bi-directional converter for rural applications , 1998, APEC '98 Thirteenth Annual Applied Power Electronics Conference and Exposition.

[10]  Sanjay Kumar Jain,et al.  Transient performance of three-phase self-excited induction generator during balanced and unbalanced faults , 2002 .

[11]  Enes Gonçalves Marra,et al.  Induction-generator-based system providing regulated voltage with constant frequency , 2000, IEEE Trans. Ind. Electron..

[12]  R. Bonert,et al.  Self-excited induction generator with excellent voltage and frequency control , 1998 .

[13]  G. Bortolotto,et al.  Voltage-frequency control of a self-excited induction generator , 1999 .

[14]  Bhim Singh,et al.  Analysis of a novel solid state voltage regulator for a self-excited induction generator , 1998 .

[15]  S. S. Murthy,et al.  Experience in the development of microhydel grid independent power generation scheme using induction generators for Indian conditions , 1998, Proceedings of IEEE TENCON '98. IEEE Region 10 International Conference on Global Connectivity in Energy, Computer, Communication and Control (Cat. No.98CH36229).

[16]  M. S. Miranda,et al.  An alternative isolated wind electric pumping system using induction machines , 1999 .

[17]  Danny Sutanto,et al.  Steady-state and transient analysis of self-excited induction generators , 1989 .

[18]  Jose Antenor Pomilio,et al.  Self-excited induction generator controlled by a VS-PWM bidirectional converter for rural applications , 1999 .

[19]  D. Henderson,et al.  AN ADVANCED ELECTRONIC LOAD GOVERNOR FOR CONTROL OF MICRO HYDROELECTRIC GENERATION , 1996, Proceedings of International Conference on Power Electronics, Drives and Energy Systems for Industrial Growth.

[20]  Loi Lei Lai,et al.  Capacitance Requirements of a Three-Phase Induction Generator Self-Excited with a Single Capacitance and Supplying a Single Phase Load , 2002 .

[21]  S. L. Nilsson,et al.  Benefits of GTO-based compensation systems for electric utility applications , 1992 .