Optimal placement and sizing of multiple STATCOM in distribution system to improve voltage profile

Power quality is an important issue when integrating renewable distributed generations and power electronic devices in distribution systems. Possible issues are unacceptable voltage fluctuation and harmonic current injections that may result in unstable and unreliable power networks. Voltage profile can be improved by compensating reactive power using flexible AC transmission systems (FACTSs) such as the static synchronous compensator (STATCOM) which has gained wide attention due to its prodigious performance. The main objectives of this paper are placement and sizing of STATCOM units as well as evaluating their performances using particle swarm optimization (PSO) to improve voltage profiles of highly distorted distribution systems. The 15-bus unbalanced test system is used for the analyses and simulations. A five level neutral-point clamped (FL-NPC) inverter with an adaptive hysteresis current controller (AHCC) is used to model the STATCOM in Matlab/Simulink.

[1]  Hirofumi Akagi,et al.  A New Neutral-Point-Clamped PWM Inverter , 1981, IEEE Transactions on Industry Applications.

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

[3]  Hisham M. Soliman,et al.  Voltage control by tap-changing transformers for a radial distribution network , 1997 .

[4]  A. E. Hammad,et al.  Comparing the voltage control capabilities of present and future VAr compensating techniques in transmission systems , 1996 .

[5]  Juan C. Vasquez,et al.  Voltage Support Provided by a Droop-Controlled Multifunctional Inverter , 2009, IEEE Transactions on Industrial Electronics.

[6]  Claudio A. Canizares,et al.  Point of collapse and continuation methods for large AC/DC systems , 1993 .

[7]  H. Wayne Beaty,et al.  Electrical Power Systems Quality , 1995 .

[8]  M. D. Stump,et al.  The role of custom power products in enhancing power quality at industrial facilities , 1998, Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137).

[9]  A. C. Zambroni de Souza.  Discussion on some voltage collapse indices , 2000 .

[10]  C.A. Canizares,et al.  Power flow and transient stability models of FACTS controllers for voltage and angle stability studies , 2000, 2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077).

[11]  D. Das,et al.  Simple and efficient method for load flow solution of radial distribution networks , 1995 .

[12]  E. Acha,et al.  Modeling and Analysis of Custom Power Systems by PSCAD/EMTDC , 2001, IEEE Power Engineering Review.

[13]  A. Sannino,et al.  Voltage control with inverter-based distributed generation , 2005, IEEE Transactions on Power Delivery.

[14]  Salman Mohagheghi,et al.  Particle Swarm Optimization: Basic Concepts, Variants and Applications in Power Systems , 2008, IEEE Transactions on Evolutionary Computation.

[15]  J.J. Shea,et al.  Understanding FACTS-concepts and technology of flexible AC transmission systems [Book Review] , 2002, IEEE Electrical Insulation Magazine.

[16]  T.G. Hazel,et al.  Voltage Regulation at Sites With Distributed Generation , 2008, IEEE Transactions on Industry Applications.

[17]  C. L. Masters.  Voltage rise: the big issue when connecting embedded generation to long 11 kV overhead lines , 2002 .