• Chindham Harish
• A.Narender rao

Modular multilevel converters (MMC) are presently the converter topology of choice for voltage-source converter high -voltage direct-current (VSC -HVDC) transmission schemes due to their very high efficiency. These converters are complex, yet fast and detailed electromagnetic transients simulation models are necessary for the research and development of these transmission schemes. Excellent work has been done in this area, though little objective comparison of the models proposed has yet been undertaken. This paper compares for the first time, the three leading techniques for producing detailed MMC VSC-HVDC models in terms of their accuracy and simulation speed for sev-eral typical simulation cases. In addition, an improved model is proposed which further improves the computational efficiency of one method. This paper concludes by presenting evidence-based recommendations for which detailed models are most suitable for which particular studies.

Accelerated model, electromagnetic-transient (EMT) simulation, HVDC transmission, modular multilevel con-verter (MMC), voltage-source converter (VSC).

"Comparison of Detailed Modeling Techniques for MMC Employed on VSC-HVDC Schemes", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.3, Issue 10, page no.44-57, October-2016, Available :http://www.jetir.org/papers/JETIR1610005.pdf

"Comparison of Detailed Modeling Techniques for MMC Employed on VSC-HVDC Schemes", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.3, Issue 10, page no. pp44-57, October-2016, Available at : http://www.jetir.org/papers/JETIR1610005.pdf