International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 11 Issue: 09 | Sep 2024
p-ISSN: 2395-0072
www.irjet.net
DESIGN AND IMPLEMENTATION OF H-BRIDGE MULTILEVEL INVERTER FOR GRID INTEGRATION R RAKSHITH1, Dr. HEMALATHA J N2, Dr. MADHU B R3 1Student, EEE Dept., RV College of Engineering, Bengaluru, India
2 Associate Professor, EEE Dept., RV College of Engineering, Bengaluru, India 3 Assistant Professor, EEE Dept., RV College of Engineering, Bengaluru, India ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - This paper work is aimed at design and
the PV panel and DC-DC converter in order to add electricity to the grid. When it comes to inverters, multilevel inverters (MLIs) and two level inverters are typically utilized [5]. Comparing MLI to two-level inverters, the former is more appealing due to lower switching stresses, lower operating frequency, and smaller filter requirements. There have been reports of several enhanced topologies with smaller filters, more stages, less Total Harmonic Distortion (THD), and fewer switches. In this operation, the DC-DC converter must run at its Maximum Power Point (MPP) in order to increase the generating efficiency. Therefore, tracking this point requires an algorithm. The MPPT algorithm is applied to find the maximum point that adjusts the duty cycle of the converter to increase the generation efficiency [8].
simulation analysis of two-stage grid connected photovoltaic(PV) system using SEPIC converter and modified H-Bridge multilevel inverter. The first stage has a Coupled Inductor based Single Ended Primary Inductor Converter(SEPIC) with Incremental Conductance Maximum Power Point Tracking(MPPT) algorithm that aid in tracking the Maximum Power Point of the PV system with high tracking speed and output efficiency. The second stage is a modified three phase H-Bridge Multilevel Inverter controlled by second order generalized integral (SOGI) technique for pumping the sinusoidal and less distorted power extracted from PV into the distribution grid. The modeling of proposed system was carried out on the PV module of total capacity of 2100W to obtain improved efficient power extraction.
Generally , the system that are connected to the grid are of two stages, the first stage is DC-to-DC converters that boosts the PV voltages and extract the Maximum Power by utilizing MPPT and the stage two is to invert this DC power to AC power. The Maximum Power Point Tracking (MPPT) algorithm is used to track the maximum power the solar array. The second order generalized integral (SOGI) technique is used to control the multilevel inverter. In the proposed system it reduces complexity, less weight, low cost, high efficiency, and sinusoidal current is injected into the grid [7].
Key Words: SEPIC Converter, DC-DC Converter, DC-AC Converter, H-Bridge Multilevel Inverter, Maximum Power Point Tracking, Total harmonic distortion, Photo Voltaic, Matlab, Simulink
1. INTRODUCTION In recent days the use of renewable energy is widely increasing day by day. Among them, Solar Energy is considered as one of the important energy sources since these are environmental friendly and produces electric power without causing pollution. Therefore, Solar Photo Voltaic (PV) panels are preferred that are readily available. The PV system is stationary, silent, free of mechanical parts, and has low running and manufacturing costs compared to other renewable resources. The use of photovoltaic as a source of electrical energy shows a growing trend both in the implementation of the global sector and in the performance of various industrial plants. This trend is motivated by many factors, such as decrease in the cost of producing photovoltaic electricity per kW and the rise in fossil fuel prices and the development of effective photovoltaic energy conversion technology [1-4].
2. CIRCUIT SCHEME Figure 1 depicts the methodology of the proposed system. It consists of dual-stage conversion: a DC-DC conversion stage and a DC-AC conversion stage. DC-DC converter ie., Single Input Multiple Output SEPIC Converter, consists of an active switch (𝑆m), two diodes (D1, D2), input inductor and capacitor (Cb, Lm) coupled to two split capacitors (𝐶1 𝑎𝑛𝑑 𝐶2), connected to a DC link. The input to the SIMO-SEPIC Converter is given from the PV panel that generates DC current from the sun’s rays. The SEPIC Converter regulates and boosts up the DC output voltage to suitable levels and feeds it to the proposed H-Bridge Multilevel Inverter. The SIMO-SEPIC Converter is controlled by Incremental Conductance MPPT Algorithm.
The photovoltaic cells generate electrical energy using the sunlight. A PV panel is formed of PV cells connected in series, parallel or series-parallel that is working commonly with a DC-DC converter and stores electrical energy in a battery array. In other situations, a DC-AC inverter is used to connect
© 2024, IRJET
|
Impact Factor value: 8.315
The modified H-Bridge multilevel inverter consists of 6 active switches (S1, S2, S3, S4, S5, S6), the input to the inverter is given from the SEPIC Converter, here the multilevel inverter converts DC to 5-Level AC. The switches of the
|
ISO 9001:2008 Certified Journal
|
Page 470