STATCOM based Control and Analysis of De-Icer with Functionality using the Modular Multilevel DC
نویسندگان
چکیده
Deicing of overhead transmission lines are necessary to prevent damage to the transmission system and outages. In this paper, a modular multilevel DC de-icer (M2D2) is introduced, based on the structure of modular multilevel converter (MMC) with full-bridge submodules. The M2D2 exhibits a lot of salient features: high modularity, scalability, compactness, high efficiency, wide DC voltage range, and no harmonic filter requirements, etc. Moreover, during good weather, the M2D2 can be configured as a static synchronous compensator (STATCOM), providing reactive power support to the grid and alleviating power quality problems. Operating principle of the M2D2 is explained, harmonic features under phase-shifted carrier (PSC) modulation are analyzed, and selections of the phase-shifted angle are derived to achieve best harmonic performance. Control schemes for M2D2 are also developed, including control of de-icing current, capacitor voltages, and reactive power. Finally, experimental results, utilizing a downscaled prototype, confirm the validity of this topology and effectiveness of the proposed control strategies.
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