Update transmission.jl to account for asymmetrical directional flow l…

…imits

This PR attempts to implement asymmetrical flow limits depending on direction on power flow on transmission lines, so that unidirectional line flows on HVDC lines can be modeled.

src/model/core/transmission/transmission.jl

@@ -174,8 +174,8 @@ function transmission!(EP::Model, inputs::Dict, setup::Dict)
     # Maximum power flows, power flow on each transmission line cannot exceed maximum capacity of the line at any hour "t"
     @constraints(EP,
         begin
-            cMaxFlow_out[l = 1:L, t = 1:T], vFLOW[l, t] <= EP[:eAvail_Trans_Cap][l]
-            cMaxFlow_in[l = 1:L, t = 1:T], vFLOW[l, t] >= -EP[:eAvail_Trans_Cap][l]
+            cMaxFlow_out[l = 1:L, t = 1:T], vFLOW[l, t] <= EP[:eAvail_Trans_Cap][l] #Change these with Auxiliary 
+            cMaxFlow_in[l = 1:L, t = 1:T], vFLOW[l, t] >= -EP[:eAvail_Trans_Cap][l] #Change these with Auxiliary 
         end)
 
     # Transmission loss related constraints - linear losses as a function of absolute value