Modellprädiktive Steuerung für Konverter mit Filterzellen basierend auf Offline-Computerisierten Pulsmustern und Online-Zellenausgleich
Anmelder: ABB SCHWEIZ AG 🇨🇭
Details
- Veröffentlichungs-Nr.
- EP4304073
- Aktenzeichen
- EP22183835
- Anmeldetag
- 8. Juli 2022
- Veröffentlichung
- 10. Januar 2024
- Rechtsraum
- EP
- IPC
- H02M7/487H02M1/00H02M7/483
Abstract
An electrical converter (10) comprises a main stage (12) adapted for converting a DC voltage into an intermediate voltage comprising at least two voltage levels and a filter cell stage (14) with a filter cell (30) for each phase of the main stage (12), each filter cell (30) being adapted for adding or subtracting a cell voltage of the filter cell (30) to the intermediate voltage. A method for controlling an electrical converter (10) comprises a pattern determination part (44) comprising the steps of: selecting and reading an offline-computed optimized pulse pattern (OPP<sub>base</sub>) from a database, wherein the selected optimized pulse pattern (OPP<sub>base</sub>) comprises switching instants for the main stage (12) and the filter cells (30) over a next computation window (α<sub>win</sub>) of a predetermined width (α<sub>w</sub>); adjusting the optimized pulse pattern (OPP<sub>base</sub>) by moving its switching instants such that average output voltages generated in the filter cells (30) are shifted towards an average output voltage reference (U<sub>bal,abc</sub>) of the filter cells (30), which is determined from measurements in the filter cells (30), and compensating these adjustments by corresponding modifications of switching instants of the main stage (12). The method comprises further a model predictive control part (46) comprising the following steps, which are performed several times during the next computation window (α<sub>win</sub>): modifying the adjusted optimized pulse patterns (66) by moving at least one transition time of a switching instant, such that a flux error determined from a difference between an estimated flux (74) of the electrical converter (10) and a reference flux trajectory (Ψ<sub>ref</sub>) is minimized; and applying at least a next switching instant from the modified adjusted pulse pattern to the electrical converter (10).
Anmelder
- Firma
- ABB SCHWEIZ AG
- Land
- 🇨🇭 Schweiz
Schweizerisch-schwedischer Technologiekonzern mit Sitz in Zürich. Fokussiert auf Elektrifizierung, Robotik, industrielle Automatisierung sowie Antriebstechnik für Industrie- und Energiekunden.
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