Coordinate Control of Grid Power, Battery SoC and LVRT Protection in Single VSC Tied DFIG

  • Ravulakari Kalyan Department of Electrical and Electronics Engineering, National Institute of Technology, Tiruchirapalli, Tamil Nadu, India
  • Venkatakirthiga Murali Department of Electrical and Electronics Engineering, National Institute of Technology, Tiruchirapalli, Tamil Nadu, India
  • Raja Pitchaimuthu Department of Electrical and Electronics Engineering, National Institute of Technology, Tiruchirapalli, Tamil Nadu, India
Keywords: Sensor less rotor position computation (SLRPC), state of charge (SoC), voltage source converter (VSC)

Abstract

This paper proposes a coordinate control scheme for the single VSC tied doubly-fed induction generator (DFIG). In this control scheme, both the grid power and battery SoC (State of Charge) are maintained to provide an un-interrupted power supply. During the continuous operation of DFIG in the sub synchronous region, there is scope for complete battery discharge. Hence to overcome this drawback, the coordinated control scheme maintains the battery SoC level within the limits. If the SoC falls below the specified lower limit, then the proposed scheme curtails the grid power. Instead of discharging the battery, the control shifts the battery to charging mode until the safe limit of SoC is attained. During the continuous operation of DFIG in the super synchronous region, if the SoC reaches its upper limit, the proposed scheme discharges the extra power to the dump load. Further, this control scheme also introduces the low voltage ride through (LVRT) aspect according to IEGC (Indian electricity grid code) of 15% of nominal voltage and also an enhanced rotor position computation is implemented for the effective estimation of rotor position for single VSC tied DFIG. This control makes the topology more robust and improves the reliability of the system. The proposed scheme is validated for a test system of 3.7 kW Wound Rotor Induction Machine based DG unit and investigations are done in MATLAB simulation.

Downloads

Download data is not yet available.

Author Biographies

Ravulakari Kalyan, Department of Electrical and Electronics Engineering, National Institute of Technology, Tiruchirapalli, Tamil Nadu, India

Ravulakari Kalyan received the bachelor’s degree in Electrical and Electronics Engineering from BVRIT affiliated to JNTUH in 2010, and the master’s degree in Power engineering from SICET affiliated to JNTUH in 2014 respectively. He is currently pursuing as Ph.D. Scholar (2016) at the Department of Electrical and Electronics Engineering, National Institute of Technology, Tiruchirapalli. His research areas include renewable energy sources, power converters and battery storage systems.

Venkatakirthiga Murali, Department of Electrical and Electronics Engineering, National Institute of Technology, Tiruchirapalli, Tamil Nadu, India

Venkatakirthiga Murali completed her B.E. in Electrical and Electronics Engineering and M.Tech. in Power Systems in 2000 and 2004 respectively. She is currently working as an Associate Professor at the EEE department of the National Institute of Technology Tiruchirappalli India and has a total of eighteen years of teaching experience. She is with NITT since 2006 and has published 45 – international journal and conference publications of IEEE and Springer. She is a reviewer for many reputed journals. She has guided many UG and PG projects. She has also guided 3 Ph.D.s and 1 M.S. (by research). She is senior IEEE member and Fellow of Institution of Engineers India. Her areas of interest are Power Systems, Distributed Generation and Micro-grids and High Voltage DC Transmission.

Raja Pitchaimuthu, Department of Electrical and Electronics Engineering, National Institute of Technology, Tiruchirapalli, Tamil Nadu, India

Raja Pitchaimuthu obtained his M.Tech degree in Energy Systems from Indian Institute of Technology Madras, Chennai in 2002 and PhD degree from National Institute of Technology, Tiruchirappalli in 2013. He is presently an Associate Professor in the Department of Electrical and Electronics Engineering at National Institute of Technology, Tiruchirappalli at India where he has been since 2006. His field of interest is design and development of controllers for power converters used in solar and wind energy conversion systems. He also does research in the development of protection schemes for transmission and distribution systems. He is a Senior Member in IEEE, life member of ISTE and Institution of Engineers (India).

References

R. Datta, and V.T. Ranganathan. ‘Variable-speed wind power generation using doubly fed wound rotor induction machine-a comparison with alternative schemes’. IEEE Trans. On Energy Conversion 17, 414–421, 2002.

L. Holdsworth, X. G. Wu, J. B. Ekanayake and N. Jenkins. ‘Comparison of fixed speed and doubly-fed induction wind turbines during power system disturbances’. IEE Proc., Gener. Transm. Distrib. 150, 343, 2003.

S.S. Murthy, B. Singh, P.K. Goel, and S.K. Tiwari. ‘A Comparative Study of Fixed Speed and Variable Speed Wind Energy Conversion Systems Feeding the Grid’. in 2007 7th International Conference on Power Electronics and Drive Systems (Bangkok, Thailand: IEEE), 736–743.

R. Pena, J.C. Clare, and G. M. Asher. ‘Doubly fed induction generator using back-to-back PWM converters and its application to variable-speed wind-energy generation’. IEE Proc., Elect. Power Appl., 143, 231–241, 1996.

S. Muller, M. Deicke, and R.W. De Doncker. ‘Doubly fed induction generator systems for wind turbines’. IEEE Ind. Appl. Mag. 8, 26–33, 2002.

A. Tapia, G. Tapia, J.X. Ostolaza, and J.R. Saenz. ‘Modelling and control of a wind turbine driven doubly fed induction generator’. IEEE Trans. On Energy Conversion 18, 194–204, 2003.

E. Bogalecka. ‘Power control of a double fed induction generator without speed or position sensor’. in Conf. Rec. EPE, 377, 224–228, 1993.

L. Xu, and P. Cartwright. ‘Direct Active and Reactive Power Control of DFIG for Wind Energy Generation’. IEEE Trans. On Energy Conversion 21, 750–758, 2003.

D. Zhi, and L. Xu. ‘Direct Power Control of DFIG with Constant Switching Frequency and Improved Transient Performance’. IEEE Trans. On Energy Conversion 22, 110–118, 2007.

J. Mohammadi, S. Vaez-Zadeh, S. Afsharnia, and E. Daryabeigi. ‘A Combined Vector and Direct Power Control for DFIG-Based Wind Turbines’. IEEE Trans. Sustain. Energy 5, 767–775, 2014.

R. Datta, and V.T. Ranganathan. ‘Direct power control of grid-connected wound rotor induction machine without rotor position sensors. IEEE Trans. Power Electron. 16, 390–399, 2001(b).

R. Datta, and V.T. Ranganathan. ‘A simple position-sensor less algorithm for rotor-side field-oriented control of wound-rotor induction machine’. IEEE Trans. Ind. Electron. 48, 786–793, 2001(a).

A. Karthikeyan, C. Nagamani, and G.S. Ilango. ‘A Versatile Rotor Position Computation Algorithm for the Power Control of a Grid-Connected Doubly Fed Induction Generator’. IEEE Trans. Energy Convers. 27, 697–706, 2012.

K. Vijayakumar, S.B. Tennakoon, N. Kumaresan, and N.G. Ammasai Gounden. ‘Real and reactive power control of hybrid excited wind-driven grid-connected doubly fed induction generators’. IET Power Electronics 6, 1197–1208, 2013.

B. Singh, and N. K. Swami Naidu. ‘Direct Power Control of Single VSC-Based DFIG Without Rotor Position Sensor’. IEEE Trans. on Ind. Appl. 50, 4152–4163, 2014.

N.K. Swami Naidu, and B. Singh. ‘Sensorless control of single voltage source converter-based doubly fed induction generator for variable speed wind energy conversion system’. IET Power Electronics 7, 2996–3006, 2014.

R.M. Prasad, and M.A. Mulla. ‘A Novel Position-Sensorless Algorithm for Field-Oriented Control of DFIG With Reduced Current Sensors. IEEE Trans. Sustain. Energy 10, 1098–1108, 2019.

G. Abad, J. Lopez, M.A. Rodriguez, M. Luis. ‘Doubly Fed Induction Machine’. Hoboken, NJ, USA: John Wiley & Sons, Inc, 2011.

M.A. Asha Rani, C. Nagamani, G. Saravana Ilango, A. Karthikeyan. ‘An Effective Reference Generation Scheme for DFIG With Unbalanced Grid Voltage’. IEEE Trans. Sustain. Energy 5, 1010–1018, 2014.

http://niwe.res.in/NIWE_OLD/Hindi/Docu/Wind_grid_code_for_Ind

http://www.cercind.gov.in/2016/orders/420_mp_2014.pdf

W. Leonhard. ‘Control of electrical drives’. Third edition. Berlin Heidelberg: Springer, 2001.

Published
2022-02-22
Section
SPECIAL ISSUE: Energy Access & Off-Grid Systems for Residential Microgrids/Nanog