**4. Conclusions**

This article proposes and presents a novel approach of modelling WPP reactive power capability using an aggregated WPP collection system parameters for Type 4 based WPPs. The inclusion of a WPP collection system in aggregated form reduces the number of parameters required for simulations, thereby substantially reducing the computational time. Additionally, the accuracy of the proposed model to estimate WPP reactive power capability is much better compared to the scaled WT model predominantly used in literature. WPP reactive power capability depends on the WPP collection system length. For large WPPs with a large collection system, the reactive power capability obtained using the proposed method is close to the actual representation of reactive power generation and absorption limits of WPP. Furthermore, using the reactive power capability of the proposed model in the power system study has shown to be a better estimate of system voltages. Based on the studies and results presented in this article, the proposed model is recommended for power system analysis studies (mainly voltage stability analysis) with large share of converter based generation.

**Author Contributions:** Conceptualization, M.S. and P.E.S.; Data curation, M.S.; Formal analysis, M.S.; Funding acquisition, P.E.S.; Investigation, M.S.; Methodology, M.S., M.A. and P.E.S.; Project administration, P.E.S.; Resources, M.S. and P.E.S.; Software, M.S.; Supervision, M.A., P.E.S. and A.D.H.; Validation, M.S.; Visualization, M.S.; Writing—original draft, M.S.; Writing—review & editing, M.A., P.E.S. and A.D.H.

**Funding:** This research was funded by the SARP project, which is funded by Energinet under the Public Service Obligation scheme (Forskel 12427).

**Conflicts of Interest:** The authors declare no conflict of interest.
