Abstract
This paper presents a design-oriented analysis on the voltage stability and the transient fault current limitation of voltage-controlled modular multilevel converter (MMC) with L-filters. First, a dual-loop voltage control based on the L-filter plant is systematically designed, where the upper limits of controller parameters for ensuring the small-signal stability are identified. Then, considering the transient fault current limitation during faults, the lower boundaries of the inner current controller parameters are derived. Within the region of allowed controller parameters, the optimization is further made to minimize the closed-loop output impedance of MMC, which enhances the robustness of MMC output voltage against the load current disturbance. Lastly, the time-domain simulations corroborate the theoretical analysis.
Original language | English |
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Title of host publication | 2019 4th IEEE Workshop on the Electronic Grid, eGRID 2019 |
Publisher | IEEE |
Publication date | Nov 2019 |
Article number | 9092721 |
ISBN (Print) | 978-1-7281-5705-4 |
ISBN (Electronic) | 9781728157047 |
DOIs | |
Publication status | Published - Nov 2019 |
Event | 4th IEEE Workshop on the Electronic Grid, eGRID 2019 - Xiamen, China Duration: 11 Nov 2019 → 14 Nov 2019 |
Conference
Conference | 4th IEEE Workshop on the Electronic Grid, eGRID 2019 |
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Country/Territory | China |
City | Xiamen |
Period | 11/11/2019 → 14/11/2019 |
Keywords
- Controller design
- Fault current
- Modular Multilevel Converter (MMC)
- Voltage control