Abstract
Conventional discontinuous pulsewidth modulation (DPWM) strategies for cascaded H-bridge static compensators suffer from poor inter-phase capacitor voltage balance control during unbalanced grid voltage conditions. Specifically, the logic-based algorithm that calculates the zero-sequence voltage (ZSV) for discontinuous operation interacts with the closed-loop capacitor voltage control. This article proposes an optimal DPWM strategy based on a finite-set optimization that chooses the best ZSV candidate that minimizes the control interactions while clamping a converter voltage. Furthermore, the effect of the different ZSV candidates on the switching loss is also considered within the optimization. Extensive experimental study is provided to demonstrate the effectiveness of the proposed approach. © 1982-2012 IEEE.
| Original language | English |
|---|---|
| Pages (from-to) | 1801-1810 |
| Journal | IEEE Transactions on Industrial Electronics |
| Volume | 71 |
| Issue number | 2 |
| Online published | 20 Mar 2023 |
| DOIs | |
| Publication status | Published - Feb 2024 |
| Externally published | Yes |
Funding
This work was supported in part by the Republic of Singapore’s National Research Foundation (NRF) through “Distributed Energy Re- source Management System for Energy Grid 2.0” project at Energy Research Institute, Nanyang Technological University, Singapore, and in part by the Office of Naval Research Global under Grant N62909-19- 1-2081.
Research Keywords
- Cascaded H-Bridge (CHB)
- discontinuous pulsewidth modulation (DPWM)
- finite-set optimization
- static compensator (StatCom)