In multiterminal hvdc load flows , mesh connected type is concerned for a 3 converter terminals (two rectifiers (R1,R2)and one inverter(I)) connections are R1-I and R2-I and R1-R2)
R1-I and R2-I links are similar to 2-terminal hvdc link modelling where as the third link R1-R2 how can we do the power transfer between a two rectifier 1 to rectifier 2.