A Strategy for Neutral Voltage Modulation Ensuring Fault Tolerance in CHB Multilevel Inverters With Reduced CMV and Unbalanced DC Sources
This paper introduces a fault-tolerant control method for Cascaded H-Bridge Multilevel Inverters (CHB MLI) using Neutral Voltage Modulation (NVM), enabling reliable operation even when DC source modules are damaged or operating at reduced voltage. The method calculates the inverter’s modu...
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IEEE
2024-01-01
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| Online Access: | https://ieeexplore.ieee.org/document/10729267/ |
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| author | Thawat Sornsadaeng Peerapon Chanhom Damrong Amorndechaphon Siriroj Sirisukprasert |
| author_facet | Thawat Sornsadaeng Peerapon Chanhom Damrong Amorndechaphon Siriroj Sirisukprasert |
| author_sort | Thawat Sornsadaeng |
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| description | This paper introduces a fault-tolerant control method for Cascaded H-Bridge Multilevel Inverters (CHB MLI) using Neutral Voltage Modulation (NVM), enabling reliable operation even when DC source modules are damaged or operating at reduced voltage. The method calculates the inverter’s modulating signals based on the lowest and middle DC source voltages of each phase, followed by the calculation and injection of a common-mode voltage (CMV) modulating signal, which is minimized or nullified. This approach effectively reduces CMV and prevents overmodulation by regulating the control signal to remain within the available module voltage, ensuring balanced three-phase output with low Total Harmonic Distortion (THD). Moreover, the method adapts to unbalanced DC source conditions by dynamically adjusting the inverter’s modulating signals in response to voltage changes, offering a more comprehensive solution compared to traditional NVM techniques. The proposed method is validated through simulations and experiments with an asymmetrical three-phase CHB MLI using Resistive-Inductive (RL) loads. Results confirm its robustness and efficiency across various fault scenarios and operating conditions, demonstrating its potential to significantly enhance system reliability, stability, and performance in industrial applications. |
| format | Article |
| id | doaj-art-0316fded8fec467caec1883e8dac4e22 |
| institution | OA Journals |
| issn | 2169-3536 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj-art-0316fded8fec467caec1883e8dac4e222025-08-20T02:12:02ZengIEEEIEEE Access2169-35362024-01-011215413815415910.1109/ACCESS.2024.348458710729267A Strategy for Neutral Voltage Modulation Ensuring Fault Tolerance in CHB Multilevel Inverters With Reduced CMV and Unbalanced DC SourcesThawat Sornsadaeng0https://orcid.org/0009-0007-3942-1792Peerapon Chanhom1Damrong Amorndechaphon2Siriroj Sirisukprasert3Department of Electrical Engineering, Faculty of Engineering, Kasetsart University, Bangkok, ThailandDepartment of Electrical Engineering, Faculty of Industrial Education, Rajamangkala University of Technology Suvarnabhumi, Nonthaburi, ThailandAutomotive and Transportation Technology Development Center (ATDC), School of Engineering, University of Phayao, Phayao, ThailandDepartment of Electrical Engineering, Faculty of Engineering, Kasetsart University, Bangkok, ThailandThis paper introduces a fault-tolerant control method for Cascaded H-Bridge Multilevel Inverters (CHB MLI) using Neutral Voltage Modulation (NVM), enabling reliable operation even when DC source modules are damaged or operating at reduced voltage. The method calculates the inverter’s modulating signals based on the lowest and middle DC source voltages of each phase, followed by the calculation and injection of a common-mode voltage (CMV) modulating signal, which is minimized or nullified. This approach effectively reduces CMV and prevents overmodulation by regulating the control signal to remain within the available module voltage, ensuring balanced three-phase output with low Total Harmonic Distortion (THD). Moreover, the method adapts to unbalanced DC source conditions by dynamically adjusting the inverter’s modulating signals in response to voltage changes, offering a more comprehensive solution compared to traditional NVM techniques. The proposed method is validated through simulations and experiments with an asymmetrical three-phase CHB MLI using Resistive-Inductive (RL) loads. Results confirm its robustness and efficiency across various fault scenarios and operating conditions, demonstrating its potential to significantly enhance system reliability, stability, and performance in industrial applications.https://ieeexplore.ieee.org/document/10729267/Cascaded H-bridge multilevel inverterscommon-mode voltagefault tolerantneutral voltage modulationspace vector pulse width modulationunbalanced DC source voltage control |
| spellingShingle | Thawat Sornsadaeng Peerapon Chanhom Damrong Amorndechaphon Siriroj Sirisukprasert A Strategy for Neutral Voltage Modulation Ensuring Fault Tolerance in CHB Multilevel Inverters With Reduced CMV and Unbalanced DC Sources IEEE Access Cascaded H-bridge multilevel inverters common-mode voltage fault tolerant neutral voltage modulation space vector pulse width modulation unbalanced DC source voltage control |
| title | A Strategy for Neutral Voltage Modulation Ensuring Fault Tolerance in CHB Multilevel Inverters With Reduced CMV and Unbalanced DC Sources |
| title_full | A Strategy for Neutral Voltage Modulation Ensuring Fault Tolerance in CHB Multilevel Inverters With Reduced CMV and Unbalanced DC Sources |
| title_fullStr | A Strategy for Neutral Voltage Modulation Ensuring Fault Tolerance in CHB Multilevel Inverters With Reduced CMV and Unbalanced DC Sources |
| title_full_unstemmed | A Strategy for Neutral Voltage Modulation Ensuring Fault Tolerance in CHB Multilevel Inverters With Reduced CMV and Unbalanced DC Sources |
| title_short | A Strategy for Neutral Voltage Modulation Ensuring Fault Tolerance in CHB Multilevel Inverters With Reduced CMV and Unbalanced DC Sources |
| title_sort | strategy for neutral voltage modulation ensuring fault tolerance in chb multilevel inverters with reduced cmv and unbalanced dc sources |
| topic | Cascaded H-bridge multilevel inverters common-mode voltage fault tolerant neutral voltage modulation space vector pulse width modulation unbalanced DC source voltage control |
| url | https://ieeexplore.ieee.org/document/10729267/ |
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