Neural-Network-Based Integrated Electronic Load Controller for Isolated Asynchronous Generators in Small Hydro Generation

This paper deals with a neural-network (NN)-based integrated electronic load controller (IELC) for an isolated asynchronous generator (IAG) driven by a constant-power small hydro uncontrolled turbine feeding three-phase four-wire loads. The proposed IELC utilizes an NN based on the least mean-square algorithm known as adaptive linear element to extract the fundamental component of load currents to control the voltage and the frequency of an IAG with load balancing in an integrated manner. The IELC is realized using zigzag/three single-phase transformers and a six-leg insulated-gate bipolar-transistor-based current-controlled voltage-source converter, a chopper switch, and an auxiliary load on its dc bus. The proposed IELC, with the generating system, is modeled and simulated in MATLAB environment using Simulink and Simpower System toolboxes. The simulated results are validated with test results on a developed prototype to demonstrate the effectiveness of IELC for the control of an IAG feeding three-phase four-wire linear/nonlinear balanced/unbalanced loads with neutral-current compensation.

[1]  B. Singh,et al.  Load Compensation for Diesel Generator Based Isolated Generation System Employing DSTATCOM , 2006, 2006 International Conference on Power Electronic, Drives and Energy Systems.

[2]  Olof Samuelsson,et al.  Voltage and frequency control for island operated induction generators , 2007 .

[3]  C. Marinescu,et al.  Electronic Load Controller for Stand-Alone Generating Units with Renewable Energy Sources , 2006, IECON 2006 - 32nd Annual Conference on IEEE Industrial Electronics.

[4]  L.A.C. Lopes,et al.  Voltage and Frequency Regulation of a Stand-Alone Self-Excited Induction Generator , 2007, 2007 IEEE Canada Electrical Power Conference.

[5]  F. Mocci,et al.  A Frequency Controller for Induction Generators In Isolated Minihydro Power Plant , 1989 .

[6]  B. Singh,et al.  Decoupled Voltage and Frequency Controller for Isolated Asynchronous Generators Feeding Three-Phase Four-Wire Loads , 2008, IEEE Transactions on Power Delivery.

[7]  Avik Bhattacharya,et al.  Adaline controlled 3-phase 3-wire shunt active power filter with enhanced performance using the capacitor voltage feedback , 2009, 2009 IEEE International Conference on Industrial Technology.

[8]  B Saritha,et al.  Power Quality Improvement in Conventional Electronic Load Controller for an Isolated Power Generation , 2013 .

[9]  J. B. Ekanayake,et al.  Induction generators for small hydro schemes , 2002 .

[10]  J. L. Woodward,et al.  Self-excited induction machine as a small low-cost generator , 1984 .

[11]  Y. Zidani,et al.  A numerical analytical approach for the optimal capacitor used for the self excited induction generator , 2001, 2001 IEEE 32nd Annual Power Electronics Specialists Conference (IEEE Cat. No.01CH37230).

[12]  B. Singh,et al.  Reduced Rating VSC With a Zig-Zag Transformer for Current Compensation in a Three-Phase Four-Wire Distribution System , 2009, IEEE Transactions on Power Delivery.

[13]  Bhim Singh,et al.  An Implementation of an Adaptive Control Algorithm for a Three-Phase Shunt Active Filter , 2009, IEEE Transactions on Industrial Electronics.

[14]  H.A. Yousef,et al.  A new method for voltage and frequency control of stand-alone self-excited induction generator using PWM converter with variable DC link voltage , 2008, 2008 American Control Conference.

[15]  J.M. Ramirez,et al.  An Electronic Load Controller for the Self-Excited Induction Generator , 2007, IEEE Transactions on Energy Conversion.

[16]  S. Rajakaruna,et al.  Unregulated performance of an induction generator in an isolated micro hydro power plant , 2005, 2005 International Power Engineering Conference.

[17]  B. Singh,et al.  A Stand-Alone Generating System Using Self-Excited Induction Generators in the Extraction of Petroleum Products , 2010, IEEE Transactions on Industry Applications.

[18]  Wang Jun,et al.  A novel electronic load controller: theory and implementation , 2001, ICEMS'2001. Proceedings of the Fifth International Conference on Electrical Machines and Systems (IEEE Cat. No.01EX501).