Voltage sag ride-through performance of Virtual Synchronous Generator

Virtual Synchronous Generator (VSG) is an inverter control structure that supports power system stability by imitating a synchronous machine. Because of the limitation in inverter power and current, their operation under disturbances should be evaluated and enhanced. In this paper, the VSG unit response to different types of faults at grid side is assessed. Besides, a theoretical analysis that traces the trajectory of state variable of the system during voltage sag is represented to justify the effect of the characteristics of symmetrical and unsymmetrical voltage sags. Knowing the critical characteristics (duration and initial point-on-wave) of each type of voltage sag created by fault, proper measures can be embedded to eliminate the hazardous consequences of voltage sags. Furthermore, three additional controllers for voltage sag ride-through enhancement are implemented and tested by experiments.

[1]  Math Bollen.  Characterisation of voltage sags experienced by three-phase adjustable-speed drives , 1997 .

[2]  M. H. J. Bollen.  Voltage Recovery after Unbalanced and Balanced Voltage Dip in Three-Phase Systems , 2002, IEEE Power Engineering Review.

[3]  M.H.J. Bollen,et al.  Mitigation of voltage dips through distributed generation systems , 2003, IEEE Transactions on Industry Applications.

[4]  J. Driesen,et al.  Virtual synchronous generators , 2008, 2008 IEEE Power and Energy Society General Meeting - Conversion and Delivery of Electrical Energy in the 21st Century.

[5]  Lieven Vandevelde,et al.  Improving the voltage dip immunity of converter-connected distributed generation units , 2008 .

[6]  K. De Gusseme,et al.  Distributed Generation for Mitigating Voltage Dips in Low-Voltage Distribution Grids , 2008, IEEE Transactions on Power Delivery.

[7]  K. Visscher,et al.  Grid tied converter with virtual kinetic storage , 2009, 2009 IEEE Bucharest PowerTech.

[8]  Ralf Hesse,et al.  Micro grid stabilization using the virtual synchronous machine (VISMA) , 2009 .

[9]  Johan Driesen,et al.  Layout and performance of the power electronic converter platform for the VSYNC project , 2009, 2009 IEEE Bucharest PowerTech.

[10]  Luiz A. C. Lopes,et al.  Virtual synchronous generator control in autonomous wind-diesel power systems , 2009, 2009 IEEE Electrical Power & Energy Conference (EPEC).

[11]  T. Ise,et al.  Stabilization of a power system with a distributed generator by a Virtual Synchronous Generator function , 2011, 8th International Conference on Power Electronics - ECCE Asia.

[12]  Qing-Chang Zhong,et al.  Synchronverters: Inverters That Mimic Synchronous Generators , 2011, IEEE Transactions on Industrial Electronics.

[13]  Sjoerd de Haan,et al.  Real time simulation of a power system with VSG hardware in the loop , 2011, IECON 2011 - 37th Annual Conference of the IEEE Industrial Electronics Society.

[14]  Ding Ming,et al.  Control strategy for virtual synchronous generator in microgrid , 2011, 2011 4th International Conference on Electric Utility Deregulation and Restructuring and Power Technologies (DRPT).

[15]  Toshifumi Ise,et al.  Reactive power control for load sharing with virtual synchronous generator control , 2012, Proceedings of The 7th International Power Electronics and Motion Control Conference.

[16]  Yushi Miura,et al.  Evaluation of Virtual Synchronous Generator (VSG) Operation under Different Voltage Sag Conditions , 2012 .

[17]  Yushi Miura,et al.  Distributed generation grid integration using virtual synchronous generator with adoptive virtual inertia , 2013, 2013 IEEE Energy Conversion Congress and Exposition.