Design selection research on LCC-MMC multiterminal Hybrid HVDC Dry-type Air-core reactors

LCC-MMC Hybrid HVDC is an essential technology for building a new type of power grid and for solving the problem of multiple DC feeds which Combining the advantages of LCC and MMC. Reasonable combination design of large capacity dry-type air-core AC- DC composite reactors for LCC-MMC Hybrid HVDC system such as smoothing reactor, bridge arm reactor and blocking filter reactor are the basis of improving transmission reliability, filtering out harmonics, restraining fault current and limiting bridge arm circulating current. This paper propose a design selection of dry-type air-core reactors for long-distance large capacity three terminal LCC-MMC Hybrid HVDC system. The main design factors of the reactors are analyzed.