NPC photovoltaic grid-connected inverter with ride-through capability under grid faults
Fault ride through (FRT) capability is one of the challenges faced in the medium to high voltage grid-tied large-scale photovoltaic (PV) power plants. This paper proposes a novel control strategy to enhance the FRT capability of a two-stage multi-string PV plant which consists of DC/DC converters an...
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| Format: | Conference Paper |
| Language: | English |
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2015
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| Online Access: | https://hdl.handle.net/10356/97934 http://hdl.handle.net/10220/38522 |
| _version_ | 1811693515873189888 |
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| author | Dehghani Tafti, Hossein Maswood, Ali Iftekhar Lim, Ziyou Ooi, Gabriel Heo Peng Raj, Pinkymol Harikrishna |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Dehghani Tafti, Hossein Maswood, Ali Iftekhar Lim, Ziyou Ooi, Gabriel Heo Peng Raj, Pinkymol Harikrishna |
| author_sort | Dehghani Tafti, Hossein |
| collection | NTU |
| description | Fault ride through (FRT) capability is one of the challenges faced in the medium to high voltage grid-tied large-scale photovoltaic (PV) power plants. This paper proposes a novel control strategy to enhance the FRT capability of a two-stage multi-string PV plant which consists of DC/DC converters and NPC inverter. The proposed control is implemented to the DC/DC converter to maintain the DC-link voltage under any grid fault conditions by adjusting the extracted PV power to the inverter output power. This is achieved by changing the PV string reference voltage from its maximum power point voltage to a new voltage point with less power. On top of that, a novel voltage-oriented control (VOC) control structure using proportional-resonant (PR) controller is proposed for the NPC inverter. Additionally, the DC-link capacitor voltages are remained balanced at all times due to the adaptive space vector modulation (ASVM) scheme. The evaluation results have verified the feasibility and the FRT capability of a 14kW PV plant using the proposed control scheme under different grid fault conditions. |
| first_indexed | 2024-10-01T06:52:55Z |
| format | Conference Paper |
| id | ntu-10356/97934 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:52:55Z |
| publishDate | 2015 |
| record_format | dspace |
| spelling | ntu-10356/979342021-01-13T04:59:36Z NPC photovoltaic grid-connected inverter with ride-through capability under grid faults Dehghani Tafti, Hossein Maswood, Ali Iftekhar Lim, Ziyou Ooi, Gabriel Heo Peng Raj, Pinkymol Harikrishna School of Electrical and Electronic Engineering IEEE International Conference on Power Electronics and Drive Systems (11th:2015) Energy Research Institute @ NTU (ERI@N) DRNTU::Engineering::Electrical and electronic engineering::Power electronics Fault ride through (FRT) capability is one of the challenges faced in the medium to high voltage grid-tied large-scale photovoltaic (PV) power plants. This paper proposes a novel control strategy to enhance the FRT capability of a two-stage multi-string PV plant which consists of DC/DC converters and NPC inverter. The proposed control is implemented to the DC/DC converter to maintain the DC-link voltage under any grid fault conditions by adjusting the extracted PV power to the inverter output power. This is achieved by changing the PV string reference voltage from its maximum power point voltage to a new voltage point with less power. On top of that, a novel voltage-oriented control (VOC) control structure using proportional-resonant (PR) controller is proposed for the NPC inverter. Additionally, the DC-link capacitor voltages are remained balanced at all times due to the adaptive space vector modulation (ASVM) scheme. The evaluation results have verified the feasibility and the FRT capability of a 14kW PV plant using the proposed control scheme under different grid fault conditions. ASTAR (Agency for Sci., Tech. and Research, S’pore) Accepted version 2015-08-26T01:06:53Z 2019-12-06T19:48:29Z 2015-08-26T01:06:53Z 2019-12-06T19:48:29Z 2015 2015 Conference Paper Dehghani Tafti, H., Maswood, A. I., Lim, Z., Ooi, G. H. P., & Raj, P. H. (2015). NPC photovoltaic grid-connected inverter with ride-through capability under grid faults. 2015 IEEE 11th International Conference on Power Electronics and Drive Systems. https://hdl.handle.net/10356/97934 http://hdl.handle.net/10220/38522 10.1109/PEDS.2015.7203401 en © 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The published version is available at: [http://dx.doi.org/10.1109/PEDS.2015.7203401]. 6 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Electrical and electronic engineering::Power electronics Dehghani Tafti, Hossein Maswood, Ali Iftekhar Lim, Ziyou Ooi, Gabriel Heo Peng Raj, Pinkymol Harikrishna NPC photovoltaic grid-connected inverter with ride-through capability under grid faults |
| title | NPC photovoltaic grid-connected inverter with ride-through capability under grid faults |
| title_full | NPC photovoltaic grid-connected inverter with ride-through capability under grid faults |
| title_fullStr | NPC photovoltaic grid-connected inverter with ride-through capability under grid faults |
| title_full_unstemmed | NPC photovoltaic grid-connected inverter with ride-through capability under grid faults |
| title_short | NPC photovoltaic grid-connected inverter with ride-through capability under grid faults |
| title_sort | npc photovoltaic grid connected inverter with ride through capability under grid faults |
| topic | DRNTU::Engineering::Electrical and electronic engineering::Power electronics |
| url | https://hdl.handle.net/10356/97934 http://hdl.handle.net/10220/38522 |
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