function a = dynidx(a)global DAE Sssc Statcom Svc Tcsc Upfcif ~a.n, return, endm = 4;k = [0:m:m*(a.n-1)]';a.v1 = DAE.n + 1 + k;a.v2 = DAE.n + 2 + k;a.v3 = DAE.n + 3 + k;a.Vs = DAE.n + 4 + k;DAE.n = DAE.n + m*a.n;type = a.con(:,4);a1 = find(type == 1);a2 = find(type == 2);a3 = find(type == 3);a4 = find(type == 4);a5 = find(type == 5);a.svc = Svc.vref(a.con(a1,2));a.tcsc = Tcsc.x0(a.con(a2,2));a.statcom = Statcom.vref(a.con(a3,2));a.sssc = Sssc.v0(a.con(a4,2));[a.upfc,a.z] = getidx(Upfc,a.con(a5,2));a.kr = getkr(Tcsc,a.con(a2,2));% disconnect Pod is the FACTS is off-lineif a.svc,     a.u(a1) = a.u(a1).*Svc.u(a.con(a1,2));     endif a.tcsc,    a.u(a2) = a.u(a2).*Tcsc.u(a.con(a2,2));    endif a.statcom, a.u(a3) = a.u(a3).*Statcom.u(a.con(a3,2)); endif a.sssc,    a.u(a4) = a.u(a4).*Sssc.u(a.con(a4,2));    endif a.upfc,    a.u(a5) = a.u(a5).*Upfc.u(a.con(a5,2));    end