Journal
2022 24TH EUROPEAN CONFERENCE ON POWER ELECTRONICS AND APPLICATIONS (EPE'22 ECCE EUROPE)
Volume -, Issue -, Pages -Publisher
IEEE
Keywords
Modular Multilevel Converters (MMC); Multi-Busbar Submodule; Mixed Modulation; Static Synchronous Compensator (STATCOM); Partially Rated Energy Storage
Funding
- China Scholarship Council (CSC)
- University of Edinburgh
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This paper presents a modular multilevel STATCOM with partially rated energy storage, which is configured based on a full bridge multi busbar Sub-module (SM). The performance of the proposed topology is compared with a conventional single-busbar full bridge STATCOM. The results show that the proposed MBSM STATCOM reduces power losses and SM voltage deviation, while improving power factor.
This paper presents a modular multilevel STATCOM with partially rated energy storage configured in sub-stacks based on full bridge multi busbar Sub-module (SM). The soft-paralleling mechanism and doubled paths increase the current limit. The lower level controller of the proposed topology is detailed introduced and the performances are compared with a conventional single-busbar full bridge STATCOM controlled by classic SM sorting based low level controller. When providing reactive power compensation, power losses is reduced by 14.9%, and the maximum SM voltage deviation is reduced by 35.2%, while active power capability is further improved from power factor = 0.5 to power factor = 0.7 with the proposed control framework of the MBSM STATCOM.
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