Impact of distributed generation and series compensation on distribution network

In this paper, the voltage profile and power quality issues of a distribution network with distributed generator (DG) and series compensation are investigated. A doubly-fed induction generator (DFIG)-based DG unit and a series capacitor (SC) and a thyristor-controlled series capacitor (TCSC) are considered for the analysis. Series compensation is implemented to reduce voltage drops in the line and feeder, and to minimize the reactive power mismatch caused by integrating DFIG units. The converter of the DFIG is modeled as an unbalanced harmonic-generating source and the load is modeled according in IEC standard 61000. The impacts of DG and series compensation on voltage profile, stability margin, dynamic stability and harmonic distortion of a distribution network are investigated in detail. Case studies are conducted on a widely used 15-bus distribution network in the DIgSILENT PowerFactory environment. The simulation results demonstrate that series compensation can enhance the collapse margin, reduce bus voltage sensitivity to reactive power and also improve both dynamic and transient voltage stabilities.

[1]  N.C. de Jesus,et al.  AES Sul's experiences using series compensation on medium-voltage distribution system , 2002, IEEE/PES Transmission and Distribution Conference and Exhibition.

[2]  B. Badrzadeh,et al.  Harmonics and resonance issues in wind power plants , 2012, 2011 IEEE Power and Energy Society General Meeting.

[3]  Hemanshu R Pota,et al.  Simultaneous STATCOM and Pitch Angle Control for Improved LVRT Capability of Fixed-Speed Wind Turbines , 2010, IEEE Transactions on Sustainable Energy.

[4]  Johan Morren,et al.  Maximum penetration level of Distributed Generation without violating voltage limits , 2009 .

[5]  M. J. Hossain,et al.  Stability improvement of wind farms using shunt and series compensation , 2012, 2012 22nd Australasian Universities Power Engineering Conference (AUPEC).

[6]  Tapan K. Saha,et al.  Impact of widespread penetrations of renewable generation on distribution system stability , 2010, International Conference on Electrical & Computer Engineering (ICECE 2010).

[7]  Claudio A. Canizares,et al.  Analysis of SVC and TCSC controllers in voltage collapse , 1999 .

[8]  W. Freitas,et al.  Small-disturbance voltage stability of distribution systems with induction generators , 2005, IEEE Transactions on Power Systems.

[9]  Robert A Barr.  Series compensation of distribution and subtransmission lines , 1997 .

[10]  S. Afsharnia,et al.  Improvement of Voltage Stability in Wind Farm Connection to distribution Network Using FACTS Devices , 2006, IECON 2006 - 32nd Annual Conference on IEEE Industrial Electronics.

[11]  M. J. Hossain,et al.  Voltage profile improvement for distributed wind generation using D-STATCOM , 2011, 2011 IEEE Power and Energy Society General Meeting.

[12]  G. Joos,et al.  Voltage stability in weak connection wind farms , 2005, IEEE Power Engineering Society General Meeting, 2005.

[13]  Laszlo Gyugyi,et al.  Understanding FACTS: Concepts and Technology of Flexible AC Transmission Systems , 1999 .

[14]  Tong Zhu,et al.  TCSC as a transient voltage stabilizing controller , 2001, 2001 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.01CH37194).

[15]  Nguyen Tung Linh.  Voltage stability analysis of grids connected wind generators , 2009, 2009 4th IEEE Conference on Industrial Electronics and Applications.

[16]  Narayana Prasad Padhy,et al.  MATLAB/SIMULINK Based Model of Single- Machine Infinite-Bus with TCSC for Stability Studies and Tuning Employing GA , 2007 .

[17]  H. R. Pota,et al.  Small-signal stability assessment of active distribution networks with dynamic loads , 2012, 2012 22nd Australasian Universities Power Engineering Conference (AUPEC).

[18]  Ali Abbaspour,et al.  Optimal DG Placement in Distribution systems Using Cost/Worth Analysis , 2009 .

[19]  Thomas Ackermann,et al.  Wind Power in Power Systems , 2005 .

[20]  Y. Hsiao.  Design of Filters for Reducing Harmonic Distortion and Correcting Power Factor in Industrial Distribution Systems , 2001 .

[21]  P. Rodriguez,et al.  Overview of FACTS devices for wind power plants directly connected to the transmission network , 2010, 2010 IEEE International Symposium on Industrial Electronics.

[22]  Lennart Söder,et al.  Distributed generation : a definition , 2001 .

[23]  E. Spooner,et al.  Grid Power Quality with Variable-Speed Wind Turbines , 2001, IEEE Power Engineering Review.

[24]  Damian Giaouris,et al.  Distributed Static Series Compensation for distribution network line voltage profile improvement , 2011, 2011 2nd IEEE PES International Conference and Exhibition on Innovative Smart Grid Technologies.

[25]  Laszlo Gyugyi,et al.  Static Synchronous Series Compensator: A Solid-State Approach to the Series Compensation of Transmission Lines , 1997 .

[26]  S. Ihara,et al.  Distribution series capacitor with high-energy varistor protection , 1993 .