Control strategy of bi-directional converter for PV-VRB energy storage system
Importance and interest for Photovoltaic installations have been increased in the recent times. But this brings new and many challenges to the electricity grid. The output power of the PV system is naturally intermittent and fluctuating due to the fluctuating sun irradiation and temperature...
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
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2015
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| Online Access: | http://hdl.handle.net/10356/64880 |
| _version_ | 1811686430352605184 |
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| author | John Mohamed Khalida Thasneem Fathima |
| author2 | Zhao Jiyun |
| author_facet | Zhao Jiyun John Mohamed Khalida Thasneem Fathima |
| author_sort | John Mohamed Khalida Thasneem Fathima |
| collection | NTU |
| description | Importance and interest for Photovoltaic installations have been increased in the
recent times. But this brings new and many challenges to the electricity grid. The
output power of the PV system is naturally intermittent and fluctuating due to the
fluctuating sun irradiation and temperature, in contrast to the conventional power
plants based on fossil fuels. Thus the reliability of the supply is challenged.
One of the potential solutions to overcome this challenge is to integrate an energy
storage system with the PV system. One of the good solutions is to use Battery
Energy Storage System along with the PV Installations as the reliability of the supply
system is increased.
The project aims in integrating Vanadium Redox Flow Battery (VRB) with the PV
system. Vanadium Redox Flow Battery has many advantages compared to
conventional batteries. It has relatively high number of cycles, rare self-discharging
rate and independent power and energy rating. Thus VRB has excellent
characteristics and thus suitable for large scale energy storage applications.
The PV-VRB integrated system can provide a reliable supply. When the PV system
supply is more than the required demand the excess power is used for charging the
VRB. When the output from the PV system is lower than the demand, the VRB
discharges and compensates for the power mismatch between PV system and the
grid.
The VRB is connected to the DC bus by a bidirectional converter which determines
and controls the mode of operation of the VRB (charging and discharging) in order
to maintain the PV output power. A control strategy for the bi-directional converter
is developed and the results have been simulated and analysed. |
| first_indexed | 2024-10-01T05:00:17Z |
| format | Thesis |
| id | ntu-10356/64880 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:00:17Z |
| publishDate | 2015 |
| record_format | dspace |
| spelling | ntu-10356/648802023-07-04T15:24:24Z Control strategy of bi-directional converter for PV-VRB energy storage system John Mohamed Khalida Thasneem Fathima Zhao Jiyun School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering::Electric power Importance and interest for Photovoltaic installations have been increased in the recent times. But this brings new and many challenges to the electricity grid. The output power of the PV system is naturally intermittent and fluctuating due to the fluctuating sun irradiation and temperature, in contrast to the conventional power plants based on fossil fuels. Thus the reliability of the supply is challenged. One of the potential solutions to overcome this challenge is to integrate an energy storage system with the PV system. One of the good solutions is to use Battery Energy Storage System along with the PV Installations as the reliability of the supply system is increased. The project aims in integrating Vanadium Redox Flow Battery (VRB) with the PV system. Vanadium Redox Flow Battery has many advantages compared to conventional batteries. It has relatively high number of cycles, rare self-discharging rate and independent power and energy rating. Thus VRB has excellent characteristics and thus suitable for large scale energy storage applications. The PV-VRB integrated system can provide a reliable supply. When the PV system supply is more than the required demand the excess power is used for charging the VRB. When the output from the PV system is lower than the demand, the VRB discharges and compensates for the power mismatch between PV system and the grid. The VRB is connected to the DC bus by a bidirectional converter which determines and controls the mode of operation of the VRB (charging and discharging) in order to maintain the PV output power. A control strategy for the bi-directional converter is developed and the results have been simulated and analysed. Master of Science (Power Engineering) 2015-06-09T02:53:41Z 2015-06-09T02:53:41Z 2014 2014 Thesis http://hdl.handle.net/10356/64880 en 64 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Electrical and electronic engineering::Electric power John Mohamed Khalida Thasneem Fathima Control strategy of bi-directional converter for PV-VRB energy storage system |
| title | Control strategy of bi-directional converter for PV-VRB energy storage system |
| title_full | Control strategy of bi-directional converter for PV-VRB energy storage system |
| title_fullStr | Control strategy of bi-directional converter for PV-VRB energy storage system |
| title_full_unstemmed | Control strategy of bi-directional converter for PV-VRB energy storage system |
| title_short | Control strategy of bi-directional converter for PV-VRB energy storage system |
| title_sort | control strategy of bi directional converter for pv vrb energy storage system |
| topic | DRNTU::Engineering::Electrical and electronic engineering::Electric power |
| url | http://hdl.handle.net/10356/64880 |
| work_keys_str_mv | AT johnmohamedkhalidathasneemfathima controlstrategyofbidirectionalconverterforpvvrbenergystoragesystem |