02718nam a22001577a 4500999001700000100007700017245010100094260003000195300000900225500204900234700004202283856003202325942001102357952009002368952010202458  c65884d65881  aMallah, Noor Muhammad a15MPE14aSupervisor - Dr. Ghullam Mustafa Bhutto  aDigital Simulation of Two Level and Three Level DC to AC Converter and Their Harmonic Evaluation  aNawabshah:bQUEST,c2019.  a51p.  aABSTRACT

Direct current (0.C) power can be converted 10 Alternative current (A.C) power at the required frequency and voltage using semiconductor devices. In other words. a solid sate device called inverter alters D.C. power 10 A.C. power. Due to vast usage of power electronic equipment, the harmonics have emerged as a main problem of recent times. it leads to several problems like overheating of equipment, intervention with the nearly equipment through lines of communication, power factor. For the compensation of the harmonics, a device called shunt active filter is used. Inverter draws only essential component of current from the given supply. These fillers are designed by using multilevel inverters and these are better and efficient as compared to the classical inverters.Inverters are classified into two categories as 2-level inverter and multilevel inverter. Multilevel inverters have some advantages over 2- level inverts such as minimum distortion of harmonics. reduced generation of Electromagnetic interference (EMl) and they can be operated on several levels of voltage. Multilevel inverter has more applications. Such as, ii can be used as an active filter and it can also be used as a machine drive for trapezoidal and sinusoidal applications. It also has some disadvantages. For example, at each stage it needs an isolated power supplies, they are much complex to build, more expensive and their control is difficult.
The main focus of this research work includes study of single phase 2-level. single phase 3-level, 3-phase 2-Level and 3-phase multilevel inverters. Main subject of this work is 2-level and 3-level inverters. To study the waveform of the inverter in MATLAB software. First of all, single and three phase inverters are modeled by using inductive and resistive load and their resulting waveforms are noted. Secondly, for the elimination of harmonics a 2-Level  inverter is modeled  using the PWM
techniques and active shunt filter. Same process is repeated for 3-Level inverter as
for 2-Level inverter.
  aDepartment of Electrical Engineering   uhttp://tinyurl.com/2p9yasf6  cTHESIS  00104070aRESEARCHbRESEARCHd2019-10-17l0pMP/51-613r2019-10-17 00:00:00yTHESIS  00104070aRESEARCHbRESEARCHd2023-12-14l0pMP/46-530r2023-12-14 00:00:00w2023-12-14yTHESIS