Design of Full-Bridge Modular Multilevel Converter with Low Energy Storage Requirements for HVdc Transmission System with Fuzzy Inference System
Sheik Rasheed1, Ch.Pavan Kumar2, M.Mani Shankar3

1Mr.Sheik Rasheed*, Department of Electrical and Electronics Engineering, Pragati Engineering College, Surampalem, Peddapuram.
2Mr.Ch.Pavan Kumar, Department of Electrical and Electronics Engineering, Pragati Engineering College, Surampalem.
3Mr.M.Mani Shankar, Department of Electrical and Electronics Engineering, Pragati Engineering College, Surampalem, Peddapuram.

Manuscript received on December 02, 2020. | Revised Manuscript received on December 05, 2020. | Manuscript published on December 30, 2020. | PP: 132-140 | Volume-10 Issue-2, December 2020. | Retrieval Number: 100.1/ijeat.B20671210220 | DOI: 10.35940/ijeat.B2067.1210220
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Abstract: This paper proposes a hierarchical Fuzzy Interface System (FIS) Predicated control architecture designed for ian arbitrary high voltage multi terminal dc (MTDC) network. Modular multilevel converter (MMC)is a well-proved circuit topology in voltage-source converter-based high voltage direct current (VSC-HVdc) transmission isystems. iAs iis iknown, ithe iconventional ihalf-bridge submodule (HBSM)-based MMC-HVdc is not suitable for overhead line transmission applications. In addition, high energy storage requirements, i.e., large capacitance is inevitable. The conventional design of the full-bridge submodule (FBSM)-based MMC usually does not utilize the negative voltage state of FBSM in normal operation. Considering the same dc voltage as with the HBSM case and utilizing the negative voltage state of the FBSM, this paper presents the design method of the power transmission capability of a single FBSM. Meanwhile, an optimized energy storage capacitance design method of the FBSM is proposed. With this method, the capacitance of FBSM can be reduced significantly. The icorrectness and effectiveness of the proposed method is verified by the simulation of ia±160kVVSC-HVdc MMC and the comparison results of the dc short fault blocking and ride through capability are also provided.
Keywords: Fuzzy controller, HVdc system, modular multilevel converter (MMC), droop control systems, power quality.