Investigation and Comparison of Using SVC, STATCOM and DBR’s Impact on Wind Farm Integration

Year 2010, Volume: 2 Issue: 4, 38 - 54, 01.12.2010

M. Sedighizadeh M. M. Hosseini

Abstract

This research studies stability of wind farms based on Fixed Speed Induction Generators (FSIG). It also investigates the effects of using SVC, STATCOM or DBR (Dynamic Resistance Braking) on wind farms stability. Because of the asynchronous operation nature, system instability of wind farms based on FSIG is largely caused by the reactive power absorption by FSIG due to the large rotor slip during fault. In this paper, a model of wind farm based on FSIG, equipped with SVC, STATCOM or DBR is developed in MATLAB/SIMULINK and then results of system simulation with these devices are compared. Finally for additional investigations and comparisons about the impact of these devices on wind farm stability, some studies are conducted on the system in different conditions and with various variables like: nominal power of the used devices, the X/R ratio of transmission line, nominal power of wind farm, wind speed and short circuit power of the network. Results of the simulation illustrate that, these devices considerably improve wind farm stability. However after considering all aspects and simulation results, In comparison with SVC and DBR, due to its dynamic performance and better reactive power support, STATCOM is the best choice for increasing stability of network connected wind farms

Keywords

Stability, Wind Farms, DBR, STATCOM, SVC

References

• D. Richardson, "Wind Energy Systems", Proceedings of the IEEE, Vol. 81, Issue. 3, March 1993, PP: 378-389
• M. Sedighizadeh, A. Rezazadeh, M. Parayandeh, "Comparison of Impacts on Wind Farm Stability Connected to Power System", International Journal of Engineering and Applied Sciences (IJEAS), Vol.2, Issue. 2, 2010, PP: 13-22
• V. Akhmatov, H. Knudsen, A.H. Nielsen, J.K. Pedersen, and N.K. Poulsen, "A Dynamic Stability Limit of Grid-connected Induction Generators". Proc. International IASTED Conference on Power and Energy Systems, Marbella, Spain, September 2000.
• L. Holdsworth, N. Jenkins, and G. Strbac, "Electrical Stability of Large, Offshore Wind Farms", IEE Seventh International Conference on AC-DC Power Transmission, pp. 156161, 2001.
• X. G. Wu, A. Arulampalam, C. Zhan, and N. Jenkins, "Application of a Static Reactive Power Compensator (STATCOM) and a Dynamic Braking Resistor (DBR) for the Stability Enhancement of a Large Wind Farm", Wind Engineering Journal, Vol. 27, No. 2, PP. 93-106, March 2003.
• R. Griinbanm, P. Halvarsson, D. Larsson, P. R. Jones, "Conditioning of Power Grid Serving Offshore Wind Farms Based on Asynchronous Generators", ABB Power Technologies, Sweden, 2004
• D. Povh, "Use of HVDC and FACTS," Proceedings of the IEEE, Vol. 88, No. 2, pp. 235245, February 2000.
• D. D. Eronmon, "Distributed Energy Resources (DER) Using FACTS, STATCOM, SVC and Synchronous Condensers for Dynamic System Control of VAR", 2005 National Association of Industry Technology Convention, USA, Nov. 2005.
• N. G. Hingorani, L. Gyugyi, " Understanding FACTS: Concepts and Technology of Flexible AC Transmission Systems", Wiley-IEEE press, Dec. 1999.