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Generalized Dynamic VSC MTDC Model for Power System Stability Studies

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3 Author(s)
Cole, S. ; Dept. of Electr. Eng., K.U. Leuven, Leuven, Belgium ; Beerten, J. ; Belmans, R.

In this paper, a new general voltage source converter high voltage direct current (VSC MTDC) model is derived mathematically. The full system model consists of the converter and its controllers, DC circuit equations, and coupling equations. The main contribution of the new model is its valid for every possible topology of the DC circuit. Practical implementation of the model in power system stability software is discussed in detail. The generalized DC equations can all be expressed in terms of matrices that are byproducts of the construction of the DC bus admittance matrix. Initialization, switching actions resulting in different topologies and simulation of the loss of DC lines amount to a simple calculation or recalculation of the DC bus admittance matrix. The model is implemented in Matlab. Examples on a two- and six-terminal system show that the new model is indeed capable of accurately simulating VSC MTDC systems with arbitrary topology.

Published in:

Power Systems, IEEE Transactions on  (Volume:25 ,  Issue: 3 )