High Efficiency Solar Power Generation with Improved Discontinuous Pulse Width Modulation (DPWM) Overmodulation Algorithms
The efficiency of a photovoltaic (PV) system strongly depends on the transformation process from solar energy to electricity, where maximum power point tracking (MPPT) is widely regarded as a promising technology to harvest solar energy in the first step. Furthermore, inverters are an essential part...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2019-05-01
|
| Series: | Energies |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1073/12/9/1765 |
| _version_ | 1811306530037825536 |
|---|---|
| author | Lan Li Hao Wang Xiangping Chen Abid Ali Shah Bukhari Wenping Cao Lun Chai Bing Li |
| author_facet | Lan Li Hao Wang Xiangping Chen Abid Ali Shah Bukhari Wenping Cao Lun Chai Bing Li |
| author_sort | Lan Li |
| collection | DOAJ |
| description | The efficiency of a photovoltaic (PV) system strongly depends on the transformation process from solar energy to electricity, where maximum power point tracking (MPPT) is widely regarded as a promising technology to harvest solar energy in the first step. Furthermore, inverters are an essential part of solar power generation systems. Their performance dictates the power yield, system costs and reliable operation. This paper proposes a novel control technology combining discontinuous pulse width modulation (DPWM) and overmodulation technology to better utilize direct current (DC) electrical power and to reduce the switching losses in the electronic power devices in conversion. In order to optimize the performance of the PV inverter, the overmodulation region is refined from conventional two-level space vector pulse width modulation (SVPWM) control technology. Then, the turn-on and turn-off times of the switching devices in different modulation areas are deduced analytically. A new DPWM algorithm is proposed to achieve the full region control. An experimental platform based on a digital signal processing (DSP) controller is developed for validation purposes, after maximum power is achieved via a DC/DC converter under MPPT operation. Experimental results on a PV system show that the DPWM control algorithm lowers the harmonic distortion of the output voltage and current, as well as the switching losses. Moreover, better utilization of the DC-link voltage also improves the PV inverter performance. The developed algorithm may also be applied to other applications utilizing grid-tie power inverters. |
| first_indexed | 2024-04-13T08:47:10Z |
| format | Article |
| id | doaj.art-eda72fcec8af41ee99d24d671d915435 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-13T08:47:10Z |
| publishDate | 2019-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-eda72fcec8af41ee99d24d671d9154352022-12-22T02:53:39ZengMDPI AGEnergies1996-10732019-05-01129176510.3390/en12091765en12091765High Efficiency Solar Power Generation with Improved Discontinuous Pulse Width Modulation (DPWM) Overmodulation AlgorithmsLan Li0Hao Wang1Xiangping Chen2Abid Ali Shah Bukhari3Wenping Cao4Lun Chai5Bing Li6College of Electrical and Power Engineering, Taiyuan University of Technology, Shanxi 030024, ChinaCollege of Electrical and Power Engineering, Taiyuan University of Technology, Shanxi 030024, ChinaElectrical Engineering School, Guizhou University, Guiyang 550025, ChinaSchool of Engineering and Applied Science, Aston University, Birmingham B4 7ET, UKSchool of Engineering and Applied Science, Aston University, Birmingham B4 7ET, UKCollege of Electrical and Power Engineering, Taiyuan University of Technology, Shanxi 030024, ChinaCollege of Electrical and Power Engineering, Taiyuan University of Technology, Shanxi 030024, ChinaThe efficiency of a photovoltaic (PV) system strongly depends on the transformation process from solar energy to electricity, where maximum power point tracking (MPPT) is widely regarded as a promising technology to harvest solar energy in the first step. Furthermore, inverters are an essential part of solar power generation systems. Their performance dictates the power yield, system costs and reliable operation. This paper proposes a novel control technology combining discontinuous pulse width modulation (DPWM) and overmodulation technology to better utilize direct current (DC) electrical power and to reduce the switching losses in the electronic power devices in conversion. In order to optimize the performance of the PV inverter, the overmodulation region is refined from conventional two-level space vector pulse width modulation (SVPWM) control technology. Then, the turn-on and turn-off times of the switching devices in different modulation areas are deduced analytically. A new DPWM algorithm is proposed to achieve the full region control. An experimental platform based on a digital signal processing (DSP) controller is developed for validation purposes, after maximum power is achieved via a DC/DC converter under MPPT operation. Experimental results on a PV system show that the DPWM control algorithm lowers the harmonic distortion of the output voltage and current, as well as the switching losses. Moreover, better utilization of the DC-link voltage also improves the PV inverter performance. The developed algorithm may also be applied to other applications utilizing grid-tie power inverters.https://www.mdpi.com/1996-1073/12/9/1765DPWMMPPTphotovoltaic power system |
| spellingShingle | Lan Li Hao Wang Xiangping Chen Abid Ali Shah Bukhari Wenping Cao Lun Chai Bing Li High Efficiency Solar Power Generation with Improved Discontinuous Pulse Width Modulation (DPWM) Overmodulation Algorithms Energies DPWM MPPT photovoltaic power system |
| title | High Efficiency Solar Power Generation with Improved Discontinuous Pulse Width Modulation (DPWM) Overmodulation Algorithms |
| title_full | High Efficiency Solar Power Generation with Improved Discontinuous Pulse Width Modulation (DPWM) Overmodulation Algorithms |
| title_fullStr | High Efficiency Solar Power Generation with Improved Discontinuous Pulse Width Modulation (DPWM) Overmodulation Algorithms |
| title_full_unstemmed | High Efficiency Solar Power Generation with Improved Discontinuous Pulse Width Modulation (DPWM) Overmodulation Algorithms |
| title_short | High Efficiency Solar Power Generation with Improved Discontinuous Pulse Width Modulation (DPWM) Overmodulation Algorithms |
| title_sort | high efficiency solar power generation with improved discontinuous pulse width modulation dpwm overmodulation algorithms |
| topic | DPWM MPPT photovoltaic power system |
| url | https://www.mdpi.com/1996-1073/12/9/1765 |
| work_keys_str_mv | AT lanli highefficiencysolarpowergenerationwithimproveddiscontinuouspulsewidthmodulationdpwmovermodulationalgorithms AT haowang highefficiencysolarpowergenerationwithimproveddiscontinuouspulsewidthmodulationdpwmovermodulationalgorithms AT xiangpingchen highefficiencysolarpowergenerationwithimproveddiscontinuouspulsewidthmodulationdpwmovermodulationalgorithms AT abidalishahbukhari highefficiencysolarpowergenerationwithimproveddiscontinuouspulsewidthmodulationdpwmovermodulationalgorithms AT wenpingcao highefficiencysolarpowergenerationwithimproveddiscontinuouspulsewidthmodulationdpwmovermodulationalgorithms AT lunchai highefficiencysolarpowergenerationwithimproveddiscontinuouspulsewidthmodulationdpwmovermodulationalgorithms AT bingli highefficiencysolarpowergenerationwithimproveddiscontinuouspulsewidthmodulationdpwmovermodulationalgorithms |