<article_id>JCIR_V4_N3_RP3</article_id>
<title>Comparative Study of Modelling Techniques for Transformerless Three Phase NPC Inverter to Eliminate Harmonic in PV System</title>
<author>Romi Choudhary</author>
<author>A.N. Tiwari</author>
<journal>Journal on Circuits And Systems</journal>
<issn>2322–035X</issn>
<volume>4</volume>
<issue>3</issue>
<first_page>15</first_page>
<last_page>23</last_page>
<keywords>Neutral Point Clamped Inverter, Photovoltaic System, LC Filter, PWM Modulation, Space Vector Modulation</keywords>
<abstract>The main objective of this paper is the proposal of new modulation techniques for three phase transformerless neutral point clamped inverters to eliminate harmonics in photovoltaic systems without requiring any modification on the multilevel inverter or any additional hardware. The modulation techniques are capable of reducing the harmonics in photovoltaic systems by applying PWM (Pulse Width Modulation) and SVPWM (Space Vector Pulse Width Modulation) or
converter. A multilevel power conversion concept is based on the combination of Neutral-Point -Clamped (NPC) and floating capacitor converters. In the proposed scheme, the voltage balancing across the floating capacitors is achieved by using a proper selection of redundant switching states, the input source is PV System. The output voltage waveforms in neutral point clamped inverters can be generated at low switching frequency losses with high efficiency and low distortions. This paper presents the switching pattern to generate symmetrical gating signal to control NPCVSI (Neutral Point Clamp Voltage Source Inverter) using matlab/simulink.</abstract>
<date>June - August 2016</date>
<copyright>Copyright &copy; 2016 i-manager publications. All rights reserved.</copyright>
<publisher>i-manager Publications</publisher>
<article_url>http://www.imanagerpublications.com/Article.aspx?ArticleId=8220</article_url>