White Paper
Power Conversion introduced the MMC technology as the product MM7 in 2020 for different applications. In 2021 MM7 for pumped hydro storage plants has been introduced.
Conclusions The MMC with an embedded energy storage system technology aims to combine the advantages of energy storage systems with MMC-based DC transmission systems to provide power support and auxiliary services for power grids incorporating large-scale renewable energy.
Abstract: Modular multilevel converter with battery energy storage system (MMC-BESS) is an excellent interfacing converter to integrate large-scale energy storage batteries and realize the interconnection between AC and DC grids.
The energy storage power station uses various battery technologies (such as lithium-ion battery, sodium sulfur battery, lead-acid battery, etc.) or other energy storage methods (such as hydraulic energy storage, thermal energy storage, compressed air energy storage, etc.) to store and release electric energy (Wang et al., 2021).
The system's multi-control dimensions offer significant benefits in both enhancing grid stability and reducing the cost of power transmission. On this basis, the ES-MMC with integrated energy storage further emphasizes the improvement of power quality, making it especially suitable for large-scale renewable energy generation scenarios.
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