Assessment of AC network modeling impact on small-signal stability of AC systems with VSC HVDC converters

Investigating small-disturbance stability in power systems with grid-following and grid-forming VSCs using hybrid modelling approaches

“…When modeling the small-signal (dynamic) part of the network, the transmission line is implemented with the common PI model. This model is appropriate for the system studied and is also deemed appropriate for representing dynamics of the frequency of interest considering the prospective converter controller interactions [7]. The equations that represent the dynamics of the network lines are shown in (2) and (3).…”

“…This paper establishes how stability assessment accuracy changes as the network region modelled using ODEs is varied. The investigation performed follows a similar procedure to [7] which investigates the impact of GFL VSCs on the hybrid modelling. However, the damping error used in [7] for determining the difference between models, may result in potentially misleading conclusions.…”

“…The investigation performed follows a similar procedure to [7] which investigates the impact of GFL VSCs on the hybrid modelling. However, the damping error used in [7] for determining the difference between models, may result in potentially misleading conclusions. Additionally, the work in [7] did excellent work in highlighting the need of hybrid modelling with GFL control but the procedure performed is very network specific and a thorough and detailed comparison procedure between models is not provided for practitioners.…”

“…However, the damping error used in [7] for determining the difference between models, may result in potentially misleading conclusions. Additionally, the work in [7] did excellent work in highlighting the need of hybrid modelling with GFL control but the procedure performed is very network specific and a thorough and detailed comparison procedure between models is not provided for practitioners. Hence, this paper develops a quantitative comparison methodology between different network models using a correlation based analysis of participation factors to assess the small signal stability assessment accuracy.…”

Energy Transfer from an Electrical Network-Connected Synchronous Machine

“…To this end, the representation of the electromagnetic coupling of the two axes d and q by equivalent diagrams of inductors and resistances is of great interest for the analysis of the operation of the machine [4][5][6] and for the identification parameters [7,8]. Important studies have been done recently in the scope of improving stability in different modalities [9][10][11][12][13][14][15][16][17][18][19][20] as shown in Table 1.…”