Source google image: https://www.researchgate.net/profile/Sebastien_Olaya/publication/311306065/figure/fig14/AS:434782933917699@1480671737113/a-Schema-electrique-equivalent-du-SRPA-b-Modele-de-Thevenin-equivalent.png
Schema electrique it
Source google image: https://www.researchgate.net/profile/Sebastien_Olaya/publication/311306065/figure/fig14/AS:434782933917699@1480671737113/a-Schema-electrique-equivalent-du-SRPA-b-Modele-de-Thevenin-equivalent.png