Energy Balance Control of a Cascaded Multilevel Inverter for Standalone Solar Photovoltaic Applications
This paper presents a clock phase-shifting (CPS) energy balance control (EBC) method for cascaded half-bridge multilevel inverters in standalone solar photovoltaic (PV) systems. It is based on the conservation of energy in each cascaded unit. By shifting the phase of the clock pulse of each cascaded...
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doaj-8f750366b17e43f3be7bb954ca459b522020-11-25T01:41:36ZengMDPI AGEnergies1996-10732017-11-011011180510.3390/en10111805en10111805Energy Balance Control of a Cascaded Multilevel Inverter for Standalone Solar Photovoltaic ApplicationsLei Wang0Qinghua Wu1Wenhu Tang2School of Electric Power Engineering, South China University of Technology, Guangzhou 510641, ChinaSchool of Electric Power Engineering, South China University of Technology, Guangzhou 510641, ChinaSchool of Electric Power Engineering, South China University of Technology, Guangzhou 510641, ChinaThis paper presents a clock phase-shifting (CPS) energy balance control (EBC) method for cascaded half-bridge multilevel inverters in standalone solar photovoltaic (PV) systems. It is based on the conservation of energy in each cascaded unit. By shifting the phase of the clock pulse of each cascaded unit, a staircase-like output voltage is obtained. The CPS EBC not only regulates the staircase-like output voltage of the cascaded multilevel inverters accurately under static conditions, but also suppresses the fluctuations of DC sources and improves its dynamic responses to load steps. Thus, the problems existing in solar PV systems using the cascaded multilevel inverters are avoided. Results obtained from simulations and experiments are presented to verify the feasibility and advantages of the proposed control method.https://www.mdpi.com/1996-1073/10/11/1805solar photovoltaic systemscascaded multilevel inverterenergy balance control |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Lei Wang Qinghua Wu Wenhu Tang |
spellingShingle |
Lei Wang Qinghua Wu Wenhu Tang Energy Balance Control of a Cascaded Multilevel Inverter for Standalone Solar Photovoltaic Applications Energies solar photovoltaic systems cascaded multilevel inverter energy balance control |
author_facet |
Lei Wang Qinghua Wu Wenhu Tang |
author_sort |
Lei Wang |
title |
Energy Balance Control of a Cascaded Multilevel Inverter for Standalone Solar Photovoltaic Applications |
title_short |
Energy Balance Control of a Cascaded Multilevel Inverter for Standalone Solar Photovoltaic Applications |
title_full |
Energy Balance Control of a Cascaded Multilevel Inverter for Standalone Solar Photovoltaic Applications |
title_fullStr |
Energy Balance Control of a Cascaded Multilevel Inverter for Standalone Solar Photovoltaic Applications |
title_full_unstemmed |
Energy Balance Control of a Cascaded Multilevel Inverter for Standalone Solar Photovoltaic Applications |
title_sort |
energy balance control of a cascaded multilevel inverter for standalone solar photovoltaic applications |
publisher |
MDPI AG |
series |
Energies |
issn |
1996-1073 |
publishDate |
2017-11-01 |
description |
This paper presents a clock phase-shifting (CPS) energy balance control (EBC) method for cascaded half-bridge multilevel inverters in standalone solar photovoltaic (PV) systems. It is based on the conservation of energy in each cascaded unit. By shifting the phase of the clock pulse of each cascaded unit, a staircase-like output voltage is obtained. The CPS EBC not only regulates the staircase-like output voltage of the cascaded multilevel inverters accurately under static conditions, but also suppresses the fluctuations of DC sources and improves its dynamic responses to load steps. Thus, the problems existing in solar PV systems using the cascaded multilevel inverters are avoided. Results obtained from simulations and experiments are presented to verify the feasibility and advantages of the proposed control method. |
topic |
solar photovoltaic systems cascaded multilevel inverter energy balance control |
url |
https://www.mdpi.com/1996-1073/10/11/1805 |
work_keys_str_mv |
AT leiwang energybalancecontrolofacascadedmultilevelinverterforstandalonesolarphotovoltaicapplications AT qinghuawu energybalancecontrolofacascadedmultilevelinverterforstandalonesolarphotovoltaicapplications AT wenhutang energybalancecontrolofacascadedmultilevelinverterforstandalonesolarphotovoltaicapplications |
_version_ |
1725040817105534976 |