A review of different multi-level inverter topologies for grid integration of solar photovoltaic system. (December 2022)

• Record Type: Journal Article
• Authors: Mehta, Shivinder; Puri, Vinod
• Is Part Of: Renewable energy focus. Volume 43(2022)
• Page Start: 263
• Page End: 276
• Publication Date: 2022-12
• Subjects: Photovoltaic systems -- Cascaded H-Bridge (CHB) -- Inverter topologies -- Multilevel Inverter (MLI) -- Harmonic Distortion; MLIs Multilevel inverters -- FACTS Flexible alternating current transmission system -- RE Renewable energy -- EVs Electrical Vehicles -- THD Total harmonic distortion -- DC Direct current -- RES Renewable Energy Sources -- SPV Solar Photovoltaic -- CHBMLIs Cascaded H-Bridge Multilevel Inverters -- AC Alternating current -- MV Medium voltage -- IGCT Insulated Gate Commutated thyristor -- IGBT Insulated Gate Bipolar Transistor -- PWM Pulse width modulation -- DCMLIs Diode clamped MLIs -- FCMLIs Flying capacitors MLIs -- CMLIs Cascaded MLIs -- UDPS Unidirectional power switches -- BV Blocking voltage -- CD Clamping diodes -- MTDC Multi Terminal DC System -- PIV Peak inverse voltage; Renewable energy sources -- Periodicals; Solar energy -- Periodicals; 333.79405
• DOI: 10.1016/j.ref.2022.10.002
• Languages: English
• ISSNs: 1755-0084

Abstract

Highlights: MLIs have high output voltage capability without step-up circuit. They minimize power losses and have high efficiencies. They minimize the THD due to its multiple steps in the output waveforms. They have low electromagnetic interface (EMI). They have higher system reliability with minimum voltage stress on the switching devices, They have low level of harmonics content that reduces the overall cost and size of the equipments. Abstract: A Solar PV Grid integrated network has different challenges such as efficiency enhancement, costs minimization, and overall system's resilience. PV strings should function at their Maximum Power Point Tracker (MPPT) in all weather situations to ensure the system's reliability. Along with the PV string, the inverter is a critical component of a grid-connected PV framework. While two-level inverters are often utilized in practice, MLIs, particularly Cascaded H-Bridge (CHB) inverters, are one of the finest alternative options available for large-scale PV network in terms of cost and efficiency. A higher resultant voltage is obtained using CHB inverters by connecting lower voltage H-bridge cells in series with higher flexibility in their construction. In a CHB-based system, an enhanced input current and output voltage rating may be achieved using lower-rated components. While CHB inverters have been successfully utilized in medium voltage with higher power drives, STATCOM, and active filters, DC voltage balancing, active and reactive power management, and active filtering present significant difficulties for CHB-based photovoltaic systems. The main focus of this study is to analyze the potential of Multilevel Inverter (MLI) topologies. This paper reviews different reduced switch MLI configurations classified as symmetric, asymmetric and hybrid configurations. The different performance parameters are analyzed based on their properties to understand the potential of discussed topologies.