document: A comparison of high-power converter topologies for the implementation of FACTS controllers This paper compares four power converter topologies for the implementation of flexible AC transmission system -LRB- FACTS -RRB- controllers : three multilevel topologies -LRB- multipoint clamped -LRB- MPC -RRB- , chain , and nested cell -RRB- and the well-established multipulse topology . In keeping with the need to implement very-high-power inverters , switching frequency is restricted to line frequency . The study addresses device count , DC filter ratings , restrictions on voltage control , active power transfer through the DC link , and balancing of DC-link voltages . Emphasis is placed on capacitor sizing because of its impact on the cost and size of the FACTS controller . A method for the dimensioning the DC capacitor filter is presented . It is found that the chain converter is attractive for the implementation of a static compensator or a static synchronous series compensator . The MPC converter is attractive for the implementation of a unified power flow controller or an interline power flow controller , but a special arrangement is required to overcome the limitations on voltage control
doc_bio_tags: O O O O O O O O O O B I O O O O O O O O O O O O O O O O O O O O O B I O O O O O O O O O O O O O O O O B I O O O O O O O O O B O B I O O O O O O O O O B I O B I I O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B I O O B I I I O O O O O O O O O O O B I I I O O O O O O O O O O O O O O O O O O O O
extractive_keyphrases: facts controllers multilevel topologies multipulse topology inverters switching frequency device count dc filter ratings unified power flow controller static compensator static synchronous series compensator
abstractive_keyphrases: high-power converter topologies comparison multipoint clamped topology statcom upfc