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POWER CONVERSION FOR UHVDC TO UHVAC BASED ON USING MODULAR MULTILEVEL CONVERTER

Gebreel, Abd Almula G. M.
http://orcid.org/0000-0002-6767-833X
http://rave.ohiolink.edu/etdc/view?acc_num=osu1429358686

Abstract Details

2015, Doctor of Philosophy, Ohio State University, Electrical and Computer Engineering.
This dissertation deals with the analysis and control of the modular multilevel converter (MMC) in order to develop a new control method to be used a wide range of submodules per arm. Ultra-high voltage DC (UHVDC) transmission systems are among the most promising systems to transmit power for distances up to 3000 km and ultra-voltage up to 2200 KVDC. One of the most challenging issues associated with UHVDC is the conversion of power at the receiving end of UHVDC transmission systems. This dissertation focuses on a development on Modular Multilevel Converter (MMC) control strategies. Two control methods are proposed, a direct pulse-width modulation (PWM) algorithm and an approximated arm energy control algorithm, MMCs to be used with a large scale of submodules per arm that can convert UHVDC 2200 KV and more to UHVAC, reducing total harmonics distortion (THD) for UHVAC less than 1%. Generating insertion indices for number of submodule per arm (N) in each control method is derived first. Second, flooring switching PWM is explained to generate number of inserted and bypassed submodules per arm. Third, analysis of the balancing of the submodules voltages and submodules selection, the key technique to achieve insertion and equalization between arm submodules, is proposed and verified by simulation and experiment. Fourth, a set of simulation results for DC bus 2200 KV and 481- level for the output voltage conducted in MATLAB/Simulink environment verify the proposed algorithm. Finally, the prototype’s hardware design and software design verify the proposed PWM algorithm experimentally. This presentation shows the experimental results.
Longya Xu, Prof. (Advisor)
Jin Wang, Prof. (Committee Member)
Mahesh Illindala, Prof. (Committee Member)
Junmin Wang, Prof. (Committee Member)
110 p.
Electrical Engineering
Modular Multilevel Converter, Direct PWM for MMC, Large number of level for MMC output voltage, Arm Energy Approximation Control, Arm Inductance Calculation, Smooth Reactor Value for MMC

Recommended Citations

Citations

  • Gebreel, A. A. G. M. (2015). POWER CONVERSION FOR UHVDC TO UHVAC BASED ON USING MODULAR MULTILEVEL CONVERTER [Doctoral dissertation, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1429358686

    APA Style (7th edition)

  • Gebreel, Abd Almula. POWER CONVERSION FOR UHVDC TO UHVAC BASED ON USING MODULAR MULTILEVEL CONVERTER. 2015. Ohio State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1429358686.

    MLA Style (8th edition)

  • Gebreel, Abd Almula. "POWER CONVERSION FOR UHVDC TO UHVAC BASED ON USING MODULAR MULTILEVEL CONVERTER." Doctoral dissertation, Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1429358686

    Chicago Manual of Style (17th edition)

osu1429358686
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© 2015, some rights reserved.Creative Commons License POWER CONVERSION FOR UHVDC TO UHVAC BASED ON USING MODULAR MULTILEVEL CONVERTER by Abd Almula G. M. Gebreel is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by The Ohio State University and OhioLINK.