Abstract
With an increasing application of power electronics converters and direct-current loads in distribution systems, the dynamic behavior of the system with nonlinearities is becoming of a particular interest. In this context, a discrete-time modeling approach is presented in this paper in order to study the stability of VSC-based AC/DC systems. The investigated system is defined through discrete-time modeling approach in this paper, and the eigenvalues of the discrete state space matrix are used to describe the dynamic characteristics. According to the proposed method, the stable boundaries can be predicted, and this method can also be effectively applied to the parameters adaptive optimization. The accuracy of the proposed method and the theoretical analyses are validated through time-domain simulations.
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