are the current demands in the Park frame before the fault.

4

5 4 

(36)

the amplitude of the current flowing into the central point ( #) must be √3 times those in the healthy phases: ⎧ # = √2 #c + 2 <sup>3</sup> <sup>+</sup> 7 − #s + 2 <sup>3</sup> <sup>+</sup> 7 In Equation (36), *i* # *d* , *i* # *<sup>q</sup>* are the current demands in the Park frame before the fault. The subscripts *x f* , *y f* , and *w f* indicate the healthy and the isolated phases, while *m* is an integer number defined by the values in Table 1.

4

5 4 −

 # = 0

2

<sup>3</sup> <sup>−</sup>
