A Survey on Modeling Line Commutated Converter HVDC Transmission Systems

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Vaibhav Varma, Dr. K T Chaturvedi

Abstract

This paper review about the dynamic phasor model of a line-commutated converter (LCC) high-voltage direct current (HVDC) transmission system. The mathematical definition and properties of dynamic phasors are utilized to model both the dc-side and the ac-side of a LCC-HVDC transmission system as well as 6-pulse Graetz Bridge, which is the building block of such a system. The developed model includes low-frequency dynamics of the systems, i.e., fundamental frequency component (50 Hz) at the ac-side and dc component at the dc-side, and removes high-frequency transients. The developed model, however, is capable of accommodating higher harmonics if necessary. The model is also able to simulate the system during abnormal modes of operations such as unbalanced operation and commutation failure. In order to develop the dynamic phasor model of a line-commutated converter, the concept of switching functions is utilized. The developed model is capable of capturing large-signal transients of the system as well as steady state operating conditions. The model can be used in order to decrease the computational intensity of LCC-HVDC simulations.

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How to Cite
, V. V. D. K. T. C. “A Survey on Modeling Line Commutated Converter HVDC Transmission Systems”. International Journal on Recent and Innovation Trends in Computing and Communication, vol. 6, no. 5, May 2018, pp. 144-8, doi:10.17762/ijritcc.v6i5.1593.
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