Analysis and Simulation of Overmodulation Modes of a Three-Inverter Block of the Photovoltaic Installation
The purpose of this work is to modernize the control scheme of a transformer-based photovoltaic system with three inverters controlled by the modified algorithms of synchronous space-vector PWM in order to ensure linear regulation of the system in the overmodulation zone of the inverter block in the...
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| Format: | Article |
| Language: | English |
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Academy of Sciences of Moldova
2022-08-01
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| Series: | Problems of the Regional Energetics |
| Subjects: | |
| Online Access: | https://journal.ie.asm.md/assets/files/02_03_55_2022.pdf |
| _version_ | 1811283047264288768 |
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| author | Oleschuk V. |
| author_facet | Oleschuk V. |
| author_sort | Oleschuk V. |
| collection | DOAJ |
| description | The purpose of this work is to modernize the control scheme of a transformer-based photovoltaic system with three inverters controlled by the modified algorithms of synchronous space-vector PWM in order to ensure linear regulation of the system in the overmodulation zone of the inverter block in the process of forming a symmetrical and synchronized (with the operating frequency of the system) voltage on the inverter-side windings of a power transformer. This goal is achieved by the fact that the process of two-stage control of the system in the zone of overmodulation of inverters is carried out on the basis of synchronized phase shifts between the control signals of inverters (a constant phase shift, as well as an additional adjustable phase shift between the inverter signals as a function of the duration of clock subintervals), with an appropriate modification of the algorithms of synchronous PWM of inverters due to the inclusion of two specialized correction factors in the basic functional dependencies. The most significant results of the work include the fact that in a system with a modified control scheme and modulation of the inverter block in the overmodulation zone, the resulting voltage on the inverter-side windings of the power transformer is characterized by quarter-wave symmetry, and its spectrum contains no even-order harmonics, as well as subharmonics, including regimes of fluctuations in the operating frequency of the system connected to a three-phase network, thereby helping to reduce losses in the transformer windings and improve the efficiency of photovoltaic systems. |
| first_indexed | 2024-04-13T02:03:30Z |
| format | Article |
| id | doaj.art-25369bc638fa472eaf244785bb7c83fa |
| institution | Directory Open Access Journal |
| issn | 1857-0070 |
| language | English |
| last_indexed | 2024-04-13T02:03:30Z |
| publishDate | 2022-08-01 |
| publisher | Academy of Sciences of Moldova |
| record_format | Article |
| series | Problems of the Regional Energetics |
| spelling | doaj.art-25369bc638fa472eaf244785bb7c83fa2022-12-22T03:07:31ZengAcademy of Sciences of MoldovaProblems of the Regional Energetics1857-00702022-08-01553172610.52254/1857-0070.2022.3-55.02Analysis and Simulation of Overmodulation Modes of a Three-Inverter Block of the Photovoltaic InstallationOleschuk V. 0Institute of Power Engineering Kishinau, Republic of MoldovaThe purpose of this work is to modernize the control scheme of a transformer-based photovoltaic system with three inverters controlled by the modified algorithms of synchronous space-vector PWM in order to ensure linear regulation of the system in the overmodulation zone of the inverter block in the process of forming a symmetrical and synchronized (with the operating frequency of the system) voltage on the inverter-side windings of a power transformer. This goal is achieved by the fact that the process of two-stage control of the system in the zone of overmodulation of inverters is carried out on the basis of synchronized phase shifts between the control signals of inverters (a constant phase shift, as well as an additional adjustable phase shift between the inverter signals as a function of the duration of clock subintervals), with an appropriate modification of the algorithms of synchronous PWM of inverters due to the inclusion of two specialized correction factors in the basic functional dependencies. The most significant results of the work include the fact that in a system with a modified control scheme and modulation of the inverter block in the overmodulation zone, the resulting voltage on the inverter-side windings of the power transformer is characterized by quarter-wave symmetry, and its spectrum contains no even-order harmonics, as well as subharmonics, including regimes of fluctuations in the operating frequency of the system connected to a three-phase network, thereby helping to reduce losses in the transformer windings and improve the efficiency of photovoltaic systems. https://journal.ie.asm.md/assets/files/02_03_55_2022.pdfvoltage source inverterphotovoltaic system |
| spellingShingle | Oleschuk V. Analysis and Simulation of Overmodulation Modes of a Three-Inverter Block of the Photovoltaic Installation Problems of the Regional Energetics voltage source inverter photovoltaic system |
| title | Analysis and Simulation of Overmodulation Modes of a Three-Inverter Block of the Photovoltaic Installation |
| title_full | Analysis and Simulation of Overmodulation Modes of a Three-Inverter Block of the Photovoltaic Installation |
| title_fullStr | Analysis and Simulation of Overmodulation Modes of a Three-Inverter Block of the Photovoltaic Installation |
| title_full_unstemmed | Analysis and Simulation of Overmodulation Modes of a Three-Inverter Block of the Photovoltaic Installation |
| title_short | Analysis and Simulation of Overmodulation Modes of a Three-Inverter Block of the Photovoltaic Installation |
| title_sort | analysis and simulation of overmodulation modes of a three inverter block of the photovoltaic installation |
| topic | voltage source inverter photovoltaic system |
| url | https://journal.ie.asm.md/assets/files/02_03_55_2022.pdf |
| work_keys_str_mv | AT oleschukv analysisandsimulationofovermodulationmodesofathreeinverterblockofthephotovoltaicinstallation |