In this section, the relation between the pairs of parameters that can be utilized to define the Vsource element are presented. As previously mentioned, the pairs are: S¯sc1 and S¯sc3; I˙sc1 and I˙sc3; Z¯0 and Z¯1. Note that it is not possible to utilize the pair Z¯s and Z¯m to define this element. Equation 27 presents the relation between S¯sc1, I˙sc1 and Z¯s, where E˙AB corresponds to the line-to-line nominal voltage of the element and Z¯s relates to Z¯0 and Z¯1 through Equation 26.

Equation 28 presents the relation between S¯sc3, I˙sc3 and  Z¯1.