Weighted Short-Circuit Ratio¶

A metric that accounts for interactions between wind plants to better estimate system strength.

Definition in an Article¶

Source: ¹

To take into account the effect of interactions between wind plants and therefore to give a better estimate of the system strength, a more appropriate quantity is the weighted short circuit ratio (WSCR), defined by:

$ WSCR= \frac{\sum_{i}^{N} S_{SCMVA_i} \cdot P_{RMW_i}}{\left(\sum_{i}^{N} P_{RMW_i}\right)^2} $

Where $S_{SCMVA_i}$ is the short circuit capacity at bus $i$ before the connection of wind plant $i$ and $P_{RMW_i}$ is the MW rating of wind plant $i$ to be connected. $N$ is the number of wind plants fully interacting with each other and $i$ is the wind plant index.

Last modified: 2025-11-29

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Zhang, Yang and Huang, Shun-Hsien Fred and Schmall, John and Conto, José and Billo, Jeffrey and Rehman, Ehsan (2014). Evaluating system strength for large-scale wind plant integration. https://doi.org/10.1109/PESGM.2014.6939043 ↩