Three-phase four-wire dstatcom with H-bridge VSC and star/delta transformer for power quality improvement

A new topology of three-phase four-wire DSTATCOM consisting of a H-bridge VSC (voltage source converter) with a star/delta transformer is proposed for power quality improvement in the distribution systems. The proposed DSTATCOM (distribution static compensator) provides the voltage regulation or power factor correction by reactive power compensation along with harmonics elimination, load balancing and neutral current compensation in three-phase four-wire distribution system. The transformer has star connected primary and delta connected secondary and the load neutral point is connected to the neutral of star winding so that it provides a path to the zero sequence fundamental as well as harmonics neutral currents. This topology has the advantages of the use of two-leg, H-bridge VSC which reduces the size and cost of the DSTATCOM. The rating of the transformer is decided based on the compensating neutral current. The performance of the proposed DSTATCOM system is validated through simulations using MATLAB software with its simulink and power system blockset (PSB) toolboxes.

[1]  Mohammad A. S. Masoum,et al.  Power Quality in Power Systems and Electrical Machines , 2008 .

[2]  H. Fujita,et al.  Voltage-Regulation Performance of a Shunt Active Filter Intended for Installation on a Power Distribution System , 2007, IEEE Transactions on Power Electronics.

[3]  Arindam Ghosh,et al.  Power Quality Enhancement Using Custom Power Devices , 2002 .

[4]  Shahrokh Saadate,et al.  New control approach for four-wire active power filter based on the use of synchronous reference frame , 2005 .

[5]  Hirofumi Akagi,et al.  Instantaneous power theory and applications to power conditioning , 2007 .

[6]  M. Tavakoli Bina,et al.  Design and installation of a ±250 kVAr D-STATCOM for a distribution substation , 2005 .

[7]  D. Lauria,et al.  Two-Leg Three-Phase Inverter Control for STATCOM and SSSC Applications , 2008, IEEE Transactions on Power Delivery.

[8]  P.E. Mercado,et al.  Control Design and Simulation of DSTATCOM with Energy Storage for Power Quality Improvements , 2006, 2006 IEEE/PES Transmission & Distribution Conference and Exposition: Latin America.

[9]  Bor-Ren Lin,et al.  Active power filter based on three-phase two-leg switch-clamped inverter , 2004 .

[10]  Bor-Ren Lin,et al.  Three-Phase Two-Leg Inverter for Stand-Alone and Grid-Connected Renewable Energy Systems , 2006, TENCON 2006 - 2006 IEEE Region 10 Conference.

[11]  A. A. Halacsy,et al.  Transformer invented 75 years ago , 1961, Electrical Engineering.

[12]  Hurng-Liahng Jou,et al.  Novel power converter topology for threephase four-wire hybrid power filter , 2008 .

[13]  Kamal Al-Haddad,et al.  Design, simulation and implementation of three-pole/four-pole topologies for active filters , 2004 .

[14]  Antonio Moreno-Munoz,et al.  Power quality : mitigation technologies in a distributed environment , 2007 .

[15]  E.R. Cadaval,et al.  Comparison of Control Strategies for Shunt Active Power Filters in Three-Phase Four-Wire Systems , 2007, IEEE Transactions on Power Electronics.

[16]  Prasad Enjeti,et al.  Analysis and design of a new active power filter to cancel neutral current harmonics in three phase four wire electric distribution systems , 1993, Conference Record of the 1993 IEEE Industry Applications Conference Twenty-Eighth IAS Annual Meeting.

[17]  Hurng-Liahng Jou,et al.  A Three-Phase Four-Wire Power Filter Comprising a Three-Phase Three-Wire Active Power Filter and a Zig–Zag Transformer , 2008, IEEE Transactions on Power Electronics.

[18]  Sewan Choi,et al.  Analysis and Control of a Single-Phase-Inverter–Zigzag-Transformer Hybrid Neutral-Current Suppressor in Three-Phase Four-Wire Systems , 2007, IEEE Transactions on Industrial Electronics.