Virtual Vector-Based FCS-MPC for NPC Three-Level Grid-Tied Inverter Without Weighting Factor of Neutral-Point Voltage Balancing
The neutral-point clamped (NPC) inverter is widely used in energy conversion, but the unbalance of neutral-point voltage (NPV) will lead to imprecise control and the decline of power quality. Conventional finite control set model predictive control (FCS-MPC) uses an extra NPV weighing factor to bala...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IEEE
2022-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/9813700/ |
| _version_ | 1818198203900624896 |
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| author | Nan Jin Dongren Dai Huan Xie Jie Wu Leilei Guo |
| author_facet | Nan Jin Dongren Dai Huan Xie Jie Wu Leilei Guo |
| author_sort | Nan Jin |
| collection | DOAJ |
| description | The neutral-point clamped (NPC) inverter is widely used in energy conversion, but the unbalance of neutral-point voltage (NPV) will lead to imprecise control and the decline of power quality. Conventional finite control set model predictive control (FCS-MPC) uses an extra NPV weighing factor to balance the NPV. But the weighting factor should tune frequently to match the best value. To cope with this problem, this paper proposes a virtual vector-based control strategy without the NPV weighting factor for NPC inverters. The paper analyses the relationship between neutral-point current and neutral-point voltage. An NPV vector is designed to inject a compensatory neutral-point current to balance the capacitor voltage. The duration time of each NPV vector is calculated from the real-time unbalance of the NPV. Because each NPV balancing virtual vector contains one NPV vector, the proposed method can balance the NPV without an extra NPV weighting factor in the cost function. Besides, a cost function without the NPV weighting factor is designed for the proposed method. Finally, experiments are carried out to verify the validity of the proposed method. |
| first_indexed | 2024-12-12T02:02:09Z |
| format | Article |
| id | doaj.art-f7dafdc691dd48d39158d5df3a38a54d |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-12T02:02:09Z |
| publishDate | 2022-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-f7dafdc691dd48d39158d5df3a38a54d2022-12-22T00:42:08ZengIEEEIEEE Access2169-35362022-01-0110728067281410.1109/ACCESS.2022.31879949813700Virtual Vector-Based FCS-MPC for NPC Three-Level Grid-Tied Inverter Without Weighting Factor of Neutral-Point Voltage BalancingNan Jin0https://orcid.org/0000-0001-9763-711XDongren Dai1Huan Xie2Jie Wu3https://orcid.org/0000-0002-7023-7375Leilei Guo4https://orcid.org/0000-0002-7747-8657College of Electrical and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou, ChinaCollege of Electrical and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou, ChinaCollege of Electrical and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou, ChinaCollege of Electrical and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou, ChinaCollege of Electrical and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou, ChinaThe neutral-point clamped (NPC) inverter is widely used in energy conversion, but the unbalance of neutral-point voltage (NPV) will lead to imprecise control and the decline of power quality. Conventional finite control set model predictive control (FCS-MPC) uses an extra NPV weighing factor to balance the NPV. But the weighting factor should tune frequently to match the best value. To cope with this problem, this paper proposes a virtual vector-based control strategy without the NPV weighting factor for NPC inverters. The paper analyses the relationship between neutral-point current and neutral-point voltage. An NPV vector is designed to inject a compensatory neutral-point current to balance the capacitor voltage. The duration time of each NPV vector is calculated from the real-time unbalance of the NPV. Because each NPV balancing virtual vector contains one NPV vector, the proposed method can balance the NPV without an extra NPV weighting factor in the cost function. Besides, a cost function without the NPV weighting factor is designed for the proposed method. Finally, experiments are carried out to verify the validity of the proposed method.https://ieeexplore.ieee.org/document/9813700/Model predictive controlvirtual vectorsneutral-point voltageNPC invertersweighting factor |
| spellingShingle | Nan Jin Dongren Dai Huan Xie Jie Wu Leilei Guo Virtual Vector-Based FCS-MPC for NPC Three-Level Grid-Tied Inverter Without Weighting Factor of Neutral-Point Voltage Balancing IEEE Access Model predictive control virtual vectors neutral-point voltage NPC inverters weighting factor |
| title | Virtual Vector-Based FCS-MPC for NPC Three-Level Grid-Tied Inverter Without Weighting Factor of Neutral-Point Voltage Balancing |
| title_full | Virtual Vector-Based FCS-MPC for NPC Three-Level Grid-Tied Inverter Without Weighting Factor of Neutral-Point Voltage Balancing |
| title_fullStr | Virtual Vector-Based FCS-MPC for NPC Three-Level Grid-Tied Inverter Without Weighting Factor of Neutral-Point Voltage Balancing |
| title_full_unstemmed | Virtual Vector-Based FCS-MPC for NPC Three-Level Grid-Tied Inverter Without Weighting Factor of Neutral-Point Voltage Balancing |
| title_short | Virtual Vector-Based FCS-MPC for NPC Three-Level Grid-Tied Inverter Without Weighting Factor of Neutral-Point Voltage Balancing |
| title_sort | virtual vector based fcs mpc for npc three level grid tied inverter without weighting factor of neutral point voltage balancing |
| topic | Model predictive control virtual vectors neutral-point voltage NPC inverters weighting factor |
| url | https://ieeexplore.ieee.org/document/9813700/ |
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