HVDC Transmission with Modular Multilevel Converters (MMC.pptx

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1. NAME: Manjeet Pal HVDC Transmission with Modular Multilevel Converters (MMC) HVDC Transmission with Modular Multilevel Converters (MMC) 1

2. HVDC Transmission with Modular Multilevel Converters (MMC) 2 Need for MMC High Voltage Capability – Enables efficient HVDC transmission over long distances. Low Harmonics – Produces near-sinusoidal waveforms, reducing the need for filters. Modular Design – Allows fault tolerance and ease of maintenance. Improved Efficiency – Reduces switching losses and enhances power quality Introduction to Modular Multilevel Converters (MMC) Modular Multilevel Converters (MMC) are advanced power electronic converters widely used in high-voltage direct current (HVDC) transmission systems. They offer a scalable and efficient solution for converting AC to DC and vice versa, enabling reliable long-distance power transmission.

3. HVDC Transmission with Modular Multilevel Converters (MMC) 3 Modular Multilevel Converter Working Principle The MMC consists of multiple submodules arranged in a cascaded configuration. It synthesizes output voltage through controlled switching sequences, minimizing harmonics and improving efficiency. Key Features MMC's key advantages include scalability, reduced harmonic distortion, efficient fault handling, and improved power quality. These make it an ideal choice for modern HVDC applications.

4. Simulation Setup HVDC Transmission with Modular Multilevel Converters (MMC) 4 Inverter Design The simulation focuses on a three-phase inverter that interfaces with the load. A 5-level MMC inverter represents each phase, demonstrating flexibility in power flow. MMC Configuration Employing a 5-level MMC with Level Shifted PWM (LSPWM) enhances voltage waveform quality. This configuration assists in minimizing harmonics during simulation. Analysis Techniques FFT analysis is conducted to measure Total Harmonic Distortion (THD). The scope tool captures output waveforms for thorough evaluation of performance metrics.

5. ANALYSIS ASPECT DESCRIPTION RESULT Overall Simulation Complete model of MLI system Verified output performance THD Measurement FFT analysis on waveforms THD measured at 17.36% LSPWM Impact 5-level inverter with LSPWM Improved output quality Waveform Verification Three-phase output waveform Reduced ripple observed Simulation Results The simulation results provide a comprehensive assessment of HVDC performance using MMC technology. THD levels indicate effective waveform management and efficiency. 5

6. Advantages of MMC HVDC Transmission with Modular Multilevel Converters (MMC) 6 Power Loss Reduction MMC’s soft-switching significantly decreases conduction and switching losses, improving efficiency across various load conditions. Harmonic Improvement By generating near-sinusoidal output waveforms, MMC minimizes external filter requirements, contributing to compact system designs. Enhanced Reliability The modular architecture of MMC fosters inherent redundancy, promoting improved fault tolerance and reduced downtime during operation.

7. Challenges and Conclusion HVDC Transmission with Modular Multilevel Converters (MMC) 7 Discussion of Challenges Despite its advantages, MMC faces challenges such as complex control algorithms, increased component counts, voltage balancing issues, and protection difficulties. Overall, its potential in HVDC systems is substantial, targeting future improvements in control and fault management.

8. THANK YOU HVDC Transmission with Modular Multilevel Converters (MMC) 8