Dynamic power control of three-phase multiport active bridge DC-DC converters for interconnection of future DC-grids
| Autor: | Rik W. De Doncker, Jan Gottschlich, Stefan P. Engel, Markus Neubert |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Interconnection
Computer science business.industry 020209 energy 020208 electrical & electronic engineering Electrical engineering 02 engineering and technology Converters Grid Power (physics) Three-phase Electromagnetic coil Dynamic demand 0202 electrical engineering electronic engineering information engineering business Voltage |
| Zdroj: | 2017 IEEE 12th International Conference on Power Electronics and Drive Systems (PEDS). |
| DOI: | 10.1109/peds.2017.8289213 |
| Popis: | Dc grid technology is currently expanding from the high-voltage to the medium-voltage range and is expected to penetrate also low-voltage grids. For interconnection of these grids, dc-dc converters that enable a flexible and highly dynamic control of the power flow between different voltage levels are required. In the scope of this paper a highly dynamic power and current control of three-phase multiport-active bridge (3ph-MAB) converters is presented. The investigations are exemplified for a three-phase triple-active bridge (3ph-TAB) converter, i.e., a 3ph-MAB converter with three ports, which connects a medium-voltage dc grid to two separate low-voltage dc grids. Firstly, the complex relation between the power at the ports and the load angles is investigated and algorithms for on-line determination of the according load angles are derived. Secondly, the instantaneous current control (ICC), which is known from the dual-active bridge converter, is adopted for the triple-active bridge converter. Thereby, a highly dynamic current control with settling times of half a switching period is achieved. Based on these considerations, a closed-loop control structure is proposed which fully utilizes the highly dynamic behavior of the ICC. The theoretic analysis is verified by simulation for a 150 kW SiC MOSFET converter prototype with three ports and nominal port voltages of 5 kV, 380 V and 760 V. |
| Databáze: | OpenAIRE |
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