Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : active filter

Effect of Non-Linear Load Harmonics on Single phase Transformer Losses and Design Active Filter

Zainab Nadhem Abbas Al-Mousaoy

Engineering and Technology Journal, 2011, Volume 29, Issue 11, Pages 2143-2155

As a result of the negative effects unshaped on some of the components in power systems such as the transformers, a great concern was shown to treatment this phenomenon so we rise in this search by designing a suitable active filter with two strategies for harmonic repression. To analysis and treatment this case, using a singlephase transformer with full-bridge rectifier, and a resistant load to generate some of
total harmonic current and voltage distortions (THDi and THDv). Finally, simulation results with psim software show that the designed active filter with two strategies is very effective in harmonic elimination and power factor correction of the single phase transformer.

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.