Comparison between selective harmonic elimination and nearest level control for transistor clamped H-bridge inverter

Total harmonic distortion <span style="font-size: 9pt; font-family: 'Times New Roman', serif;" lang="EN-US">(THD) is</span><span 10.0pt; Roman',serif; mso-fareast-font-family: Roman'; mso-ansi-language: EN-US; mso-fareast-language: mso-bidi-language: AR-SA;" lang="EN-US"> a key index used to measure the quality of output waveforms in multilevel inverters. In this paper </span><span lang="EN-US">the THD is investigated and compared between two modulation methods; selective elimination nearest level control, for 13-level transistor clamped H-bridge (TCHB) inverter. The selected TCHB topology employs reduced number DC sources switches with other conventional inverters, which helps reduce size cost performance both methods has been validated through simulations using MATLAB/Simulink. results show that elimination, exists narrow range index,</span> <em>M</em> (0.687≤M≤0.694),<span lang="EN-US">while control method, wider of</span> (M≥0.917), lang="EN-US">which means different ranges </span><!--[if gte msEquation 12]><m:oMath><i
 style='mso-bidi-font-style:normal'><span lang=EN-US style='font-size:9.0pt;
 font-family:"Cambria Math",serif;mso-fareast-font-family:"Times Roman";
 mso-bidi-font-family:"Times Roman";color:black;mso-ansi-language:EN-US;
 mso-fareast-language:EN-US;mso-bidi-language:AR-SA'><m:r>M</m:r></span></i></m:oMath><![endif]--><!--[if !msEquation]--><!--[endif]--><span methods. obtained from fulfills IEEE Std 519-2014 standard harmonics. Nearest method conceptually simple produces better method.</span><span lang="EN-US">distortion (THD) index, lang="MS">(</span><!--[if lang=MS Roman";color:black;mso-ansi-language:MS;
 mso-fareast-language:EN-US;mso-bidi-language:AR-SA'><m:r>0.687≤</m:r><m:r>M</m:r><m:r>≤0.694</m:r></span></i></m:oMath><![endif]--><!--[if lang="MS">)</span><span lang="EN-US">, while (</span><!--[if mso-fareast-language:EN-US;mso-bidi-language:AR-SA'><m:r>M</m:r><m:r>≥0.917</m:r></span></i></m:oMath><![endif]--><!--[if lang="EN-US">), method</span>