Article
A Modified Harmonics Reduction Technique for a ThreePhase Controlled Converter
King Saud Univ., Riyadh
IEEE Transactions on Industrial Electronics (Impact Factor: 6.5). 04/2008; DOI: 10.1109/TIE.2007.908542 Source: IEEE Xplore

Article: Novel Third Harmonic Current Injection Technique for Harmonic Reduction of Controlled Converters
[Show abstract] [Hide abstract]
ABSTRACT: Threephase controlled converters have many applications in the utility interfacing of renewable energy sources and adjustable speed drives as a rectifier or inverter. The utility line currents of these converters have a high harmonic distortion, which is more than the harmonic standards. This paper introduces a new technique for circulating the third harmonic currents from the dclink to the line currents to reduce their harmonic contents. The proposed system uses a singlephase PWM converter to control the angle and amplitude of the injection current for each of the firing angle of a threephase converter. A detailed analysis is introduced to achieve a relationship between the firing angle of the threephase controlled converter and the power angle of the PWM converter. In addition, a detailed design for the other injection path components is introduced. A simulation and experimental work is introduced to prove the mathematical derivations. Analysis, simulation and experimental results prove the superiority of the proposed technique. NOMENCLATURE I f The third harmonic injection current. v a , i a The voltage and current of phase a. α The firing angle of the threephase converter. θ on The angle of V on,3 referred to v a in the 180 Hz domain. Ψ The angle between V on,3 , and I f in the 180 Hz domain. Ψ opt The angle between V on,3 , and I f for the minimum THD in the line currents in the 180 Hz domain. Φ The angle between V a and I f in the 180 Hz domain. Φ opt The angle between V a , and I f for the minimum THD in the line currents in the 180 Hz domain. V m The peak value of the phase voltage. ω The angular velocity of the fundamental frequency. V LL The rms value of the line to line supply voltage. V dn The rms value of the voltage between points d and n. V fn The rms value of the voltage between points f and n. V on,3k The rms value of the (3k) harmonic of the voltage between points o and n. k =1, 2 , 3, 4, .……. a 0 , a h , b h Fourier coefficients. L dc , C dc Inductor and capacitor in the dclink. m a Modulation index of the singlephase PWM converter.Journal of power electronics 11/2012; 12(6):925934. · 0.78 Impact Factor 
Conference Paper: A Novel Harmonic Reduction Technique for Controlled Converter by Third Harmonic Current Injection
[Show abstract] [Hide abstract]
ABSTRACT: Threephase controlled converter has many applications in interfacing renewable energy sources and adjustable speed drives as a rectifier or inverter. The utility line currents of this converter have high harmonic distortion more than the harmonic standards. This research introduces a new technique of circulating third harmonic currents from dclink to the line currents to reduce its harmonic contents. The new proposed system uses singlephase controlled converter to control the angle of injection current for each firing angle of the threephase converter. A detailed analysis is introduced to achieve a relation between the firing angles of three and singlephase controlled converters. Also a detailed design for other injection path components is introduced. A simulation and experimental work is introduced to prove the mathematical derivations. Analysis, simulation and experimental results prove the superiority of the proposed technique.IEEE International Conference, on Control System, Computing and Engineering, (ICCSCE 2012); 11/2012 · 1.69 Impact Factor 
Conference Paper: PSCAD validation of deltawye transformer as a harmonic filter for THD mitigation of line currents in threephase bridge rectifier
[Show abstract] [Hide abstract]
ABSTRACT: The 3phase diode bridge rectifier has the least line current distortion among 6pulse rectifiers; however, its total harmonic distortion (THD) of 31.08% violates power quality standards. This paper reports distortion reduction by lowering magnitudes of harmonics in the line currents using a deltawye transformer between the 3phase utility and the diode bridge rectifier. The leakage inductances of the transformer windings provide a filtering effect on the line current harmonics thus providing THD mitigation of utility line currents. The efficacy of the technique is proved by Power Systems Computer Aided Design (PSCAD) simulations considering the bridge rectifier with and without the deltawye transformer of vector group Dyl. Experimental results without and with the Dyl transformer feeding the diode bridge rectifier are presented.Sustainable Energy Technologies (ICSET), 2012 IEEE Third International Conference on; 01/2012
Data provided are for informational purposes only. Although carefully collected, accuracy cannot be guaranteed. The impact factor represents a rough estimation of the journal's impact factor and does not reflect the actual current impact factor. Publisher conditions are provided by RoMEO. Differing provisions from the publisher's actual policy or licence agreement may be applicable.