Gutha, RK and Paul, S and Basak, S and Ghotgalkar, S and Basu, K (2023) A Two-Loop Feedback Control Strategy For Neutral Point Voltage Balancing Of Vienna Rectifier With A Carrier-Based Implementation. In: 11th National Power Electronics Conference, 14 December 2023 to 16 December 2023, Guwahati.
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Abstract
Neutral point voltage unbalancing is one of the key issues faced by Vienna rectifier, which causes line current distortion, higher device stress, and eventual failure. This unbalancing is caused by the neutral point current which is a function of modulation strategy. The distribution of the dwell time of a space-vector between its redundant switching states impacts this neutral point current. But the model between the neutral point voltage and the distribution factor is non-linear. Therefore, the existing control strategy based on the small-signal linearized plant is not effective to mitigate the unbalance. This paper proposes an alternative control strategy where the plant becomes linear under large-signal variation. Hence, a simple controller can balance the neutral point voltage on a cycle-by-cycle basis. It also nullifies the DC offset across the capacitors during start or transient. A carrier comparison based implementation of the proposed control is also proposed. The proposed strategy is verified through simulation and experiment on a 1 kW hardware prototype. © 2023 IEEE.
| Item Type: | Conference Paper |
|---|---|
| Publication: | 2023 11th National Power Electronics Conference, NPEC 2023 |
| Publisher: | Institute of Electrical and Electronics Engineers Inc. |
| Additional Information: | The copyright for this article belongs to Institute of Electrical and Electronics Engineers Inc. |
| Keywords: | Electric rectifiers; Feedback; Power quality; Pulse width modulation; Rectifying circuits, Carrier-based implementation; Control strategies; Feedback control strategies; Loop feedback; Near three space-vector PWM; Neutral points; Neutral-point voltages; Point currents; Space vector PWM; Vienna rectifiers, Vector spaces |
| Department/Centre: | Division of Electrical Sciences > Electrical Engineering |
| Date Deposited: | 04 Mar 2024 09:11 |
| Last Modified: | 04 Mar 2024 09:11 |
| URI: | https://eprints.iisc.ac.in/id/eprint/84225 |
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