/** partial derivative of to-side reactive power w.r.t to-side voltage angle */
public float getdTQdTVa() {
return _list.getdTQdTVa(_ndx);
}
/** partial derivative of to-side reactive power w.r.t to-side voltage angle */
public float getdTQdTVa() {
return _list.getdTQdTVa(_ndx);
}