Modeling, estimation, and self-tuning control of AC/DC systems

TL;DRAbstract

Currently, most of the design and planning studies of HVDC systems are performed on analog and scaled-down simulators in industrial laboratories. In this research, we developed a modular digital simulation of the DC terminal and interfaced it with the efficient Bergeron's technique for network simulation. This combination is much easier to setup than the TACS in the Electromagnetic Transient Program, and has the same capability to represent, in detail, a large piece of the AC network. Other additions to the program include the representation of static var compensator, nonlinear transformers and zinc oxide arresters. Another aspect of simulation dealt with in this research is the establishment of a linear model for determining suitable parameters and for stability studies. A key component in such modeling is the discrete nature of the converter. Based on the model proposed by Sucena Paiva, a discrete linear model of a complete AC/DC link was developed. This model was then tested and the

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