Abstract
Modular multilevel converter (MMC) topology has emerged as an attractive solution for Photovoltaic (PV) applications. Such a structure due to its inherent modularity allows distributed architecture of utility scale PV plant. Moreover, converters scalability allows for direct connection to the medium voltage grid by avoiding the need for the step-up transformer. The isolation is provided at the interface between the PV array and the MMC by using an isolated DC-DC converter. In this work the MMC performance is evaluated and compared with the main central inverter configurations in terms of annual energy yield, efficiency and levelized cost of energy. Efficiency curve from no load to full load is obtained for the MMC through simulations using standard IGBT half-bridge modules. It is seen that the efficiency curve is flat for a wide range of loads resulting in a higher annual energy yield and lower Levelized Cost of Energy (LCOE).
| Original language | English |
|---|---|
| Article number | 8771241 |
| Journal | IEEE Transactions on Energy Conversion |
| Volume | 34 |
| Issue number | 4 |
| Pages (from-to) | 1731-1740 |
| Number of pages | 10 |
| ISSN | 0885-8969 |
| DOIs | |
| Publication status | Published - Dec 2019 |
Keywords
- Modular Multilevel Converter
- Utility Scale PV Plant
- Medium voltage
- Annual Energy Yield
- Central Inverter
- Levelized Cost of Energy
- utility scale PV plant
- central inverter
- Modular multilevel converter
- medium voltage
- annual energy yield
- levelized cost of energy