Rajendrasinh JADEJA, Akash FALDU, Tapankumar TRIVEDI, Vinod PATEL, Siddharthsingh CHAUHAN

Compensation of Harmonics in Neutral Current Using Active Power Filter for Three Phase Four Wire System

Increased penetration of nonlinear loads like power electronic converter based systems haveaggravated issue of harmonic injection in the power system. Neutral current harmonics is anissue of concern for three phase four wire system. This paper is focused on the elimination ofneutral current harmonics with the help of shunt active power filter based on the star-deltatransformer and single phase half bridge inverter. The presented active power filter eliminatesharmonics present in neutral current which in turn helps in mitigating third harmonics from thesupply mains. The topology has the advantage of reduced number of semiconducting devicesand switching losses as compared to conventional three phase active filter. Simulation studiesfor the proposed active filter are presented and compared with the behavior of conventionalthree phase active filter. Experimental results for DSP based laboratory prototype of theproposed filter are shown to substantiate performance of system. Both simulations, as well asexperimental results, demonstrate effective compensation provided by single phase half bridgeinverter based active filter.

PDF

___

Dugan R. C., McGranaghan M. F., Wayne B.H., "Electrical power systems quality", TATA Mc-Graw Hill India, (1996).
Gruzs T. M., "A survey of neutral currents in three-phase computer power systems", IEEE Transactions on Industry Applications, 26(4), 719-725, (1990).
Gruzs T. M., "Effects of Nonlinear Loads on Electrical Circuits and Equipment: Summary of a Symposium", National Academy Press, (1991).
Pitel I. J., Enjeti P., "Active harmonic power filter apparatus and method," 1996.
Singh B., Al-Haddad K., Chandra A., "A review of active filters for power quality improvement", IEEE Transactions on Industrial Electronics, 46(5), 960-971, (1999).
Akagi H., "Instantaneous power theory and application to power conditioning", John Wiley & Sons, (2004).
Trivedi T. A., Jadeja R., Bhatt P., "A Review on Direct Power Control for Applications to Grid Connected PWM Converters", Engineering, Technology & Applied Science Research, 5(4), 841- 849, (2015).
Sreenivasarao D., Agarwal P., Das B., "Neutral current compensation in three-phase, four-wire systems: A review", Electric Power Systems Research, 86, 170-180, (2012).
Saribulut L., Ahmet T., Meral M. E., Tumay M., "Active power filter: review of converter topologies and control strategies", Gazi university journal of science, 24(2), 283-289, (2011).
RodrÍguez P., Candela J. I., Luna A., Asiminoaei L., Teodorescu R., Blaabjerg F., "Current Harmonics Cancellation in Three-Phase Four-Wire Systems by Using a Four-Branch Star Filtering Topology", IEEE Transactions on Power Electronics, 24(8), 1939-1950, (2009).
Bouzelata Y., Kurt E., Chenni R., Altın N., "Design and simulation of a unified power quality conditioner fed by solar energy", International Journal of Hydrogen Energy, 40(44), 15267-15277, (2015).
Ucar M., Ozdemir E., "Control of a 3-phase 4-leg active power filter under non-ideal mains voltage condition", Electric Power Systems Research, 78(1), 58-73, (2008).
Kale M., Ozdemir E., "Harmonic and reactive power compensation with shunt active power filter under non-ideal mains voltage", Electric Power Systems Research, 74(3), 363-370, (2005).
Izhar M., Hadzer C. M., Syafrudin M., Taib S., Idris S., "An analysis and design of a star delta transformer in series with active power filter for current harmonics reduction", PECon 2004. Proceedings. National Power and Energy Conference, 94-98, (2004).
Singh B., Jayaprakash P., Kothari D. P., "Magnetics for neutral current compensation in three-phase four-wire distribution system", Joint International Conference on Power Electronics, Drives and Energy Systems Power India, 1-7, (2010 ).
Jayaprakash P., Singh B., Kothari D. P., "Digital Signal Processor Implementation of Isolated Reduced-rating Voltage Source Converter Using a Zig-zag Transformer for Three-phase Four-wire Distribution Static Compensator", Electric Power Components and Systems, 39(1), 15-30, (2011).
Singh B., Jayaprakash P., Kothari D. P., "A T-Connected Transformer and Three-leg VSC Based DSTATCOM for Power Quality Improvement", IEEE Transactions on Power Electronics, 23(6), 2710-2718, (2008).
Quinn C. A., Mohan N., "Active filtering of harmonic currents in three-phase, four-wire systems with three-phase and single-phase nonlinear loads", Applied Power Electronics Conference and Exposition , Seventh Annual, 829-836, (1992).