diff --git a/Artifacts.toml b/Artifacts.toml
index 000fe0c..9e97aa2 100644
--- a/Artifacts.toml
+++ b/Artifacts.toml
@@ -1,10 +1,10 @@
 [CaseData]
-git-tree-sha1 = "906591a156d0f786940f105e4f6aeceffefa7a2e"
+git-tree-sha1 = "afb608473cf4d5eb22147856de1a1a651f36d40b"
 lazy = true
 
     [[CaseData.download]]
-    url = "https://github.com/NREL-Sienna/PowerSystemsTestData/archive/refs/tags/3.0.tar.gz"
-    sha256 = "6e8b16c62c8859d39a0d8eae65a20f8aa3da9a70b7e36d3dce690dcad1775437"
+    url = "https://github.com/NREL-Sienna/PowerSystemsTestData/archive/refs/tags/3.1.tar.gz"
+    sha256 = "4ac6ccd9dc9690b52ad6d0f46eeb759608e04ef8bc871732ff54bdbb0493dcea"
 
 [rts]
 git-tree-sha1 = "5098f357bad765bfefcff58f080818863ca776bd"
diff --git a/src/definitions.jl b/src/definitions.jl
index b0275ac..814e540 100644
--- a/src/definitions.jl
+++ b/src/definitions.jl
@@ -1,6 +1,6 @@
 const PACKAGE_DIR = joinpath(dirname(dirname(pathof(PowerSystemCaseBuilder))))
 const DATA_DIR =
-    joinpath(LazyArtifacts.artifact"CaseData", "PowerSystemsTestData-3.0")
+    joinpath(LazyArtifacts.artifact"CaseData", "PowerSystemsTestData-3.1")
 
 const RTS_DIR = joinpath(LazyArtifacts.artifact"rts", "RTS-GMLC-0.2.2")
 
diff --git a/src/library/psi_library.jl b/src/library/psi_library.jl
index 213b637..4061dfc 100644
--- a/src/library/psi_library.jl
+++ b/src/library/psi_library.jl
@@ -1545,3 +1545,75 @@ function build_HVDC_TWO_RTO_RTS_5Min_sys(; kwargs...)
     new_sys = _duplicate_system(main_sys_RT, deepcopy(main_sys_RT), true)
     return new_sys
 end
+
+function build_MTHVDC_two_RTS_DA_sys_noForecast(; kwargs...)
+    sys_rts = build_RTS_GMLC_DA_sys_noForecast(; kwargs...)
+    sys = _duplicate_system(sys_rts, deepcopy(sys_rts), false)
+    include(joinpath(
+        DATA_DIR,
+        "psy_data",
+        "data_mthvdc_twin_rts.jl",
+    ))
+    # Remove AC connection
+    ac_interconnection = first(PSY.get_components(PSY.MonitoredLine, sys))
+    PSY.remove_component!(sys, ac_interconnection)
+
+    ### Add DC Buses ###
+    for dcbus in dcbuses
+        PSY.add_component!(sys, dcbus)
+    end
+
+    ### Add DC Lines ###
+    for dcline in dclines
+        PSY.add_component!(sys, dcline)
+    end
+
+    ### Add IPCs ###
+    function get_bus_by_number(sys, number)
+        return first(get_components(x -> x.number == number, Bus, sys))
+    end
+
+    for (ix, bus_tuple) in enumerate(bus_arcs_7T)
+        dcbus = get_bus_by_number(sys, bus_tuple[1])
+        acbus = get_bus_by_number(sys, bus_tuple[2])
+        ipc = PSY.InterconnectingConverter(;
+            name = "$(bus_tuple[2])_$(bus_tuple[1])",
+            available = true,
+            bus = acbus,
+            dc_bus = dcbus,
+            active_power = 0.0,
+            rating = 1.0,
+            active_power_limits = (min = 0.0, max = 1.0),
+            base_power = P_limit_7T[ix],
+            loss_function = PSY.QuadraticCurve(
+                c_pu[ix],
+                b_pu[ix],
+                a_pu[ix],
+            ),
+        )
+        PSY.add_component!(sys, ipc)
+    end
+
+    for bus_tuple in bus_arcs_9T
+        dcbus = get_bus_by_number(sys, bus_tuple[1])
+        acbus = get_bus_by_number(sys, bus_tuple[2])
+        ipc = PSY.InterconnectingConverter(;
+            name = "$(bus_tuple[2])_$(bus_tuple[1])",
+            available = true,
+            bus = acbus,
+            dc_bus = dcbus,
+            active_power = 0.0,
+            rating = 1.0,
+            active_power_limits = (min = 0.0, max = 1.0),
+            base_power = P_limit_9T,
+            loss_function = PSY.QuadraticCurve(
+                c_pu_9T,
+                b_pu_9T,
+                a_pu_9T,
+            ),
+        )
+        PSY.add_component!(sys, ipc)
+    end
+
+    return sys
+end
diff --git a/src/system_descriptor_data.jl b/src/system_descriptor_data.jl
index 9cffb3f..8e700d4 100644
--- a/src/system_descriptor_data.jl
+++ b/src/system_descriptor_data.jl
@@ -829,6 +829,13 @@ const SYSTEM_CATALOG = [
         raw_data = RTS_DIR,
         build_function = build_HVDC_TWO_RTO_RTS_5Min_sys,
     ),
+    SystemDescriptor(;
+        name = "MTHVDC_two_RTS_DA_sys_noForecast",
+        description = "Two RTS systems connected by two multi-terminal HVDC systems",
+        category = PSISystems,
+        raw_data = RTS_DIR,
+        build_function = build_MTHVDC_two_RTS_DA_sys_noForecast,
+    ),
     SystemDescriptor(;
         name = "psse_ACTIVSg2000_sys",
         description = "PSSE ACTIVSg2000 Test system",