Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : inverter

Harmonics Study of 3-Phase Space Vector PWM Inverter

Ahamed Assad Hadi; Majid K. Al-Khatat

Engineering and Technology Journal, 2011, Volume 29, Issue 12, Pages 2439-2455

This paper proposes the modeling ,implementation and simulation of three phase induction motor driver, using voltage- fed space vector pulse width modulation technique (SVPWM).The sources of total harmonics (i.e. total effective harmonics,inter-harmonics,and sub-harmonics) and how it affects on drive system and their affects on the supply power network are studied. A developed formula of total harmonics distortion factor (THD) including ,inter -harmonic, and sub- harmonic has been introduced while in the previous studies are neglected. The effect of inter-harmonics and sub-harmonics on the performance parameter of total harmonics distortion factor , switching losses factor (SLF) and quality factor (QF) has been deduced. Modeling , and simulation of the system using PSIM software are also presented. All results are obtained by studying the waveforms of voltage and current at the source and load sides with different speeds of motor drive. The simulation and experimental result are consistent with theoretical studies and excellent , they indicate that the model is accurate and practicable.

Analysis and Simulation of Shunt Active Power Filter For Harmonic Cancellation of Non Linear Loads

Ahmed M. Mohammed

Engineering and Technology Journal, 2010, Volume 28, Issue 16, Pages 5188-5199

Use of nonlinear loads, such as power converters, power sources,
uninterruptible power supply (UPS) units, and arc devices like electric furnaces and fluorescent lamps and large adjustable speed motor drives, is expected to grow rapidly. All of these loads inject harmonic currents and reactive power into the power system. This paper presents a study and simulation of a three phase active power filter. A multilevel PWM inverter is used with current control technique. The proposed control system is very simple and therefore practical
implementation of active power filters is available. The presented system is able to compensating current harmonics, reactive power and unbalance current of non linear loads. The total harmonic distortion is calculated for deferent load before and after filtering with deferent type of filter. A comparison is made between passive filter and active.
The results have been obtained using software called PSIM, which has
demonstrated its reliability for almost 10 years of simulations, which have been approved with real experimental results.