A Novel Cascaded Multilevel Inverter for High Power UPS Application

Senthilkumar, R.; Jerome, Jovitha
September 2011
European Journal of Scientific Research;9/21/2011, Vol. 60 Issue 2, p207
Academic Journal
This paper presents a novel cascaded multilevel inverter topology for high power Uninterruptible Power Supply (UPS) systems. Traditional systems consists of PWM inverters with high switching frequency which leads to increased switching stress and low value of voltage gain. Cascaded Multilevel Inverters (CMLI) have higher voltage gain, less switching stress and low Total Harmonic Distortion (THD) and more efficient and suitable for utility applications due to its improved harmonic profile and increased power ratings. It also requires fewer switching devices for producing the same number of voltage levels thus reducing the control circuit and cost. The proposed scheme offers less weighted THD and higher output voltage levels. The proposed inverter is modelled using PSIM and various parameters like THD, power quality, dynamic response and efficiency are analysed. A prototype experimental setup of a 1KVA CMLI is developed to validate the simulation results.


Related Articles

  • Performance Analysis of Three Phase Multilevel Inverters Using Sinusoidal Pulse Width Modulation with Zero Sequence Signal. Palanivel, P.; Dash, S. S.; Chellammal, N.; Zobaa, A. F. // International Review of Electrical Engineering;Mar/Apr2011 Part A, Vol. 6 Issue 2, p566 

    In this paper, various pulse width modulation techniques are proposed, which can minimize total harmonic distortion and enhance the output voltages in five-level inverters. Multilevel inverters are important for power electronics applications, such as flexible AC transmission systems, renewable...

  • Line Voltage THD Calculation of Cascaded Multilevel Inverter's Stepped Waveform with Equal DC Sources. Farokhnia, Naeem; Vadizadeh, Hadi; Anvariasl, Fariba // International Review of Electrical Engineering;May/Jun2011 Part A, Vol. 6 Issue 3, p1094 

    Multilevel Inverters can produce a stepped voltage that has less harmonic content rather than H-bridge inverters. THD is normally used as a benchmark to evaluate the harmonic content. In literature, the THD formula of phase voltage of the multilevel inverter has been presented. But, for...

  • Total Harmonic Distortion Minimization of Multilevel Converters Using Genetic Algorithms. Salami, A.; Bayat, B. // Applied Mathematics;Jul2013, Vol. 4 Issue 7, p1023 

    This paper presents a genetic algorithm (GA) optimization technique to find the optimum switching angles of 11-level inverter with minimum number of dc sources and switches in comparison with the cascade multilevel inverter in order to minimize the total harmonic distortion (THD) of their output...

  • OPTIMUM SPACE VECTOR PWM ALGORITHM FOR THREE-LEVEL INVERTER. Urmila, B.; Rayudu, D. Subba // Journal of Engineering & Applied Sciences;2011, Vol. 6 Issue 9, p24 

    A Three-Level Voltage Source Inverter is used increasingly to supply a variable frequency and variable voltage for variable speed applications. A suitable pulse width modulation technique is employed to obtain the required output voltage at the line side of the inverter. This paper studies...

  • Asymmetrical Multilevel Inverter Topology with Reduced Number of Switches. Ahmed, Rokan Ali; Mekhilef, Saad; Ping, Hew Wooi // International Review of Electrical Engineering;Jul/Aug2012, Vol. 7 Issue 4, p4761 

    A new asymmetrical multilevel inverter topology with reduced number of power switches is introduced in this paper. The installation area, voltage standing on each switch, converter cost and losses are also taken into consideration in this design. Further, operating principles and switching...

  • Simulation Model of Single-Phase Simplified Eleven-Level Inverter. Christopher, I. William; Ramesh, R. // International Journal of Computer Applications;Nov2013, Vol. 81, p18 

    This paper presents simulation model of a single phase simplified eleven-level inverter (SELI). Multilevel inverter offers high power capability. Its performance is highly superior to that of conventional two-level inverter due to reduced harmonic distortion, lower electromagnetic interference...

  • Research of Circulating Current Restrain in Parallel Inverter Systems Based on Fuzzy Control. Xuejun Li; Hao Long; Kuanfang He; Jinglong Huang // Journal of Convergence Information Technology;Apr2013, Vol. 8 Issue 8, p777 

    In order to realize the inverters operate in parallel, the output of each inverter must be synchronized. The traditional method of adjusting is the power adjustment method which exist the problems that the system reaches the steady state takes a long time, the parameters is difficult to...

  • Microcontroller-Based HEPWM Cascaded H-Bridge Multilevel Inverter System for Renewable Energy Application. Azli, Naziha Ahmad; Nayan, Norkharziana Mohd; Ayob, Shahrin Md; Abdullah, Ami Nurul Nazifah; Mazalan, Siti Khodijah // Applied Mechanics & Materials;2015, Vol. 793, p297 

    This paper presents the implementation of a microcontroller-based Harmonic Elimination PWM (HEPWM) switching scheme of a Cascaded H-Bridge Multilevel Inverter (CHMI) for renewable energy system. This technique applies Particle Swarm Optimization (PSO) technique to allow computation of HEPWM...

  • Adaptive fuzzy-sliding control with fuzzy-sliding switching for three-phase active power filter. Fei, Juntao; Hou, Shixi // Transactions of the Institute of Measurement & Control;Dec2013, Vol. 35 Issue 8, p1094 

    In this paper, an adaptive fuzzy-sliding control system is proposed to improve the dynamic performance of a three-phase active power filter (APF). Adaptive fuzzy controllers are employed to approximate both the equivalent control term and the switching control term in the sliding mode...


Read the Article


Sign out of this library

Other Topics