Fig. 4
From: Interconnected multi-machine power system stabilizer design using whale optimization algorithm
![Fig. 4](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs41601-019-0116-6/MediaObjects/41601_2019_116_Fig4_HTML.png)
Heffron - Philips model for multi-machine system
From: Interconnected multi-machine power system stabilizer design using whale optimization algorithm
Heffron - Philips model for multi-machine system