Generic modeling of a self-commutated multilevel VSC HVDC system for power system stability studies

Abstract

This paper provides a generic stability model of a self-commutated multilevel VSC (Voltage Source Converter) HVDC (High Voltage Direct Current) and its appropriate control. At first the approach of modeling depicts the independence of the AC and DC quantities and therefore two separate models -one for the AC and one for the DC side -can be figured out. The AC side model is developed in the dq frame out of the according differential equations. For the DC side no further transformation is required. Regarding the fact of balanced energy terms the two models can be merged.The consolidation of both models reveals a comprehensive large signal model of a multilevel based HVDC system which can be used for detailed analyses in power system stability studies. Due to the comparison of the generic stability model with an EMT (Electro-Magnetic Transient) HVDC model the consistence of the dynamic behavior is shown.

Optimal gain scheduling of VSC‐HVDC system sliding mode control via artificial bee colony and mine blast algorithms

“…The developed mathematical model has been compared with an EMT model using controlled voltage sources. Adequate agreement of the results of the both models has been demonstrated [5]. Amin and Molinas [6] have presented the stability analysis of VSC-HVDC system considering the effects of grid impedance.…”

“…Since 2015, abundant researches have emphasised the environmental, technical, economical importance of the integration of non-linear VSC-HVDC transmission. Hahn et al [5] have shown the development process of a large signal stability model of a self-commutated multilevel VSC-HVDC system by merging AC side model with the DC side model. The developed mathematical model has been compared with an EMT model using controlled voltage sources.…”