Article

Harmonic mitigation using 12-pulse AC-DC converter in vector-controlled induction motor drives

Dept. of Electr. Eng., Indian Inst. of Technol., New Delhi, India
IEEE Transactions on Power Delivery (Impact Factor: 1.66). 08/2006; 21(3):1483 - 1492. DOI: 10.1109/TPWRD.2005.860265
Source: IEEE Xplore

ABSTRACT In this paper, a novel autotransformer with a reduced kilovolt-ampere rating is presented for harmonic current reduction in twelve-pulse ac-dc converter-fed vector-controlled induction motor drives (VCIMDs). Different transformer arrangements for 12-pulse-based rectification are also studied and a novel harmonic mitigator capable of suppressing fifth, seventh, and 11th (most dominant harmonics) in the supply current is presented. The design procedure for the proposed autotransformer is presented to show the flexibility in the design for making it a cost-effective replacement suitable for retrofit applications, where presently a six-pulse diode bridge rectifier is being used. The effect of load variation on VCIMD is also studied to demonstrate the effectiveness of the proposed harmonic mitigator. A set of power-quality indices on input ac mains and on a dc bus for a VCIMD fed from different 12-pulse ac-dc converters is given to compare their performance.

15 Followers
 · 
1,503 Views
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: A 24-pulse rectifier has been designed for high voltage, low current applications. Four 3-phase systems are obtained from a single 3-phase source using novel interconnection of conventional single-and 3-phase transformers. From two 30º displaced 3-phase systems feeding two 6-pulse rectifiers that are series connected, a 12-pulse rectifier topology is obtained. Thus, from the four 3-phase systems that are displaced by 15º two 12-pulse rectifiers are obtained that are cascaded to realize a 24-pulse rectifier. Phase shifts of 15º and 30º are made using phasor addition of relevant line voltages with a combination of single-phase and three-phase transformers respectively. PSCAD based simulation and experimental results that confirm the design efficacy are presented.
  • [Show abstract] [Hide abstract]
    ABSTRACT: The load-commutated inverter (LCI)-based synchronous motor (SM) drive that is fed by a 12-pulse ac–dc converter results in harmonics mitigation. These drives have a further improved power quality at the ac mains if an appropriate passive filter is used at the ac mains for power factor (PF) correction and harmonics reduction. This paper deals with a simplified optimization algorithm based on a particle swarm optimization method for the selection of passive filter components. This algorithm is used to design passive filters for three types of loads on an LCI–SM drive, i.e., constant-torque–variable-speed loads, constant-speed–variable-torque loads, and variable-speed–variable-torque loads, to meet the requirements of a wide range of applications. The obtained results show reduction in the total harmonic distortion in the current and voltage at ac mains, reduced supply current, and improved PF.
    IEEE Transactions on Industry Applications 07/2014; 50(4):2681-2689. DOI:10.1109/TIA.2013.2292991 · 2.05 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: This paper presents the simulation and transient analysis of conventional and advanced aircraft electric power systems with harmonics mitigation. Complete modeling of aircraft electric power systems is proposed. The conventional aircraft electrical power system is analyzed considering equivalent passive AC and DC loads under transient and steady-state operating conditions. The electric power source is simulated to ensure constant frequency and voltage which meet the aircraft electrical standards for all loading cases. To mitigate the harmonics generated by the converters, passive input filters are designed to keep THD values within the standard limits. Furthermore, the advanced aircraft electrical system is simulated and analyzed under the same electric power source and loads. The results are compared to those of the conventional aircraft electric power system.
    Electric Power Systems Research 04/2009; DOI:10.1016/j.epsr.2008.10.001 · 1.60 Impact Factor