Power Quality Improvement in Distribution System using Active Filter Technology
Praveen Kumar Joshi1, R. P Singh2, Chava Sunil Kumar3

1Praveen Kumar Joshi, Research Scholar, Department of Electrical Engineering, SSSUTMS Sehore (M.P.), India.
2Dr. R. P. Singh, Vice-Chancellor, Professor, Department of Electronics and Communication Engineering, SSSUTMS, Sehore (M.P.), India.
3Dr. Chava Sunil Kumar, Professor & HOD, Department of EEE, BVRIT College of Engineering for Women, Hyderabad, India.
Manuscript received on 05 May 2019 | Revised Manuscript received on 12 May 2019 | Manuscript published on 30 May 2019 | PP: 619-625 | Volume-8 Issue-7, May 2019 | Retrieval Number: G5468058719/19©BEIESP
Open Access | Ethics and Policies | Cite | Mendeley | Indexing and Abstracting
© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: Power distribution systems are crucial for growth of industries and pave way for economic growth as well. In such systems, flaws in distribution leads to deteriorated quality distribution. Active Power Filter (APF) is the device which is capable of eliminating both lower order and higher order harmonics in distribution systems. Distribution networks bestow a great job in supplying power to different kinds of non-linear loads. For instance, it can supply power to high power industrial electrolysis and three phase rectifier fed motor drives. In the rectifiers and inverter stations converter transformers are used. Converter transformer plays an important role in distribution systems. Traditional converter transformers in the presence of non-linear loads harmonic components can cause affect winding of the transformer. This in turn reduces the life time of transformer besides brining many power quality problems to the distribution networks. To overcome these drawbacks, this paper proposes a converter transformer with APF to leverage benefits of APF and improve power quality improvement in distribution systems. The filter circuit is associated with the secondary common winding and secondary prolonged winding provided a tap at the connecting point of these two. When secondary prolonged winding encounters harmonic current, common winding associated with the new converter transformer is able to cause contrasting harmonic current in order to balance it. This is made possible with the secondary common winding with zero impendence design. Thus in the new converter transformer, the primary winding does not have any induced harmonic current. The proposed APF is evaluated with simulation study that showed power quality enhancement in distribution when compared with state of the art shunt active power filtering. 
Keyword: Distribution Systems, Converter Transformer, Novel Active Power Filter, Current Control 
Scope of the Article: Quality Control