International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 11 Issue: 02 | Feb 2024
p-ISSN: 2395-0072
www.irjet.net
Power Loss Evaluation of 5 Level Multilevel Inverters connected to Solar Sourced Stand alone Micro Grid System Mallikarjuna G D1, Dr. Sheshadri G.S2, 1Assitant Professor,
2Professor,
Department of Electrical & Electronics Engineering, Department of Electrical & Electronics Engineering, Tontadarya College of Engineering, Sri Siddhartha Institute of Technology, SSAHE, Gadag, Karnataka, India. Tumukuru, Karnataka, India. ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract
laminators, pumps, conveyors, compressors, fans, blowers, and mills Uninterruptable Power Supply (UPS), DC power source utilization, induction heating, high voltage direct current power transmission, variable frequency drive, etc. One clear disadvantage of multilevel power conversion is the great number of power semiconductor switches needed. Another disadvantage of multilevel power converters is that the small voltage steps are typically produced by isolated voltage sources or a bank of series capacitors. Isolated voltage sources may not always be readily available and series capacitors require voltage balance. Multilevel inverters are more popular than conventional two-level inverters [6-7]. This is due to twolevel limitation when handling high voltage and power. Transformerless multi-level inverter topologies replace power losses and act as voltage source inverters. The output of the multilayer inverter simulation will be compared in order to see an improvement in power quality, with a focus on losses, efficiency and total harmonic distortion (THD).
Power electronic converters were developed to integrate solar panels to the electric grid. Inverters are required to convert the direct current power of the PV array into the alternating current required for loads. Multilevel inverters are now frequently used in solar systems. Multilevel inverters have various advantages over conventional inverters to use in high power applications. The performance of the Active Neutral Clamped Inverter (ANPC) multilevel inverter (MLI) is evaluated in order to improve power quality. The simulation results presented show that the comparison with the Diode Clamped Multilevel Inverter (DCMLI), Capacitor Clamped Multilevel Inverter (CCMLI) and the proposed ANPC Multilevel inverter which generates less harmonics, less losses and better efficiency in the micro grid system. A simulation is performed on the MATLAB 2018b version system. Key Words: CCMLI, DCMLI, Losses, Multi level inverter, SPWM, Power losses, THD.
2. Overview of Multilevel Voltage source Inverter Topologies
1. INTRODUCTION
2.1 Multilevel Voltage-Source Inverters
The usage of renewable energy resources (RES) has increased rapidly compared to non renewable sources [12]. When compared to other options utilized in power applications, photovoltaic generation is becoming a more significant renewable resource [3] because it produces no noise, pollution, fuel costs, or maintenance requirements.
Multilevel voltage-source inverters (VSIs) are power electronic converters used in many different applications, including as motor drives, renewable energy systems, and high-voltage direct current (HVDC) transmission. These inverters create stepped or layered waveforms by synthesizing an output voltage waveform from a variety of DC voltage sources. Multilevel inverters [8-9] have an advantage over traditional two-level inverters in that they can produce an output voltage that is almost sinusoidal, with less harmonic content and less voltage stress on the switching components. As a result, they work particularly effectively in situations that call for high voltage levels and excellent voltage waveforms. The different multilevel inverters are
In heavy duty industries and high voltage applications, the use of multilevel inverters are becoming common since many of the machinery uses electrical drives. The advantages of multilevel converters is their smaller output voltage step, which results in high voltage capability, lower harmonic components, lower switching losses, better electromagnetic compatibility, and high power quality [4]. Also it can operate at both fundamental switching frequency and high switching frequency Pulse Width Modulation. It must be noted that lower switching frequency usually means lower switching loss and higher efficiency [5]. Today, multilevel inverters are extensively used in medium voltage levels with high-power applications. The field of applications includes use in
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Diode-Clamped Multilevel Inverter (Neutral-Point Clamped Inverter): Firstly in his kind of multilayer inverter connects many DC voltage sources in series using clamping diodes and diodes. The number of voltage sources employed and the clamping diode [10] design control the voltage levels at the output. Inverters with two, three, and five levels are common configurations. They
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