Merge pull request #868 from PowerGridModel/step-up-trafo-validation

Step-up transformer tap changer support: additional tests

tests/cpp_unit_tests/test_tap_position_optimizer.cpp

@@ -184,7 +184,7 @@ TEST_CASE("Test Transformer ranking") {
         CHECK_NOTHROW(pgm_tap::build_transformer_graph(get_state(6, 2, 1, 4, 5)));
     }
 
-    SUBCASE("Full grid") {
+    SUBCASE("Full grid 1 - For graph construction steps") {
         // =====Test Grid=====
         // ________[0]________
         // ||           |    |
@@ -324,15 +324,64 @@ TEST_CASE("Test Transformer ranking") {
         }
 
         SUBCASE("Ranking complete the graph") {
-            // (TODO: jguo) existing demo grid is not compatible with the updated ranking
-            // The test grid needs to be updated here to match the new ranking logic
-            // pgm_tap::RankedTransformerGroups order = pgm_tap::rank_transformers(state);
-            // pgm_tap::RankedTransformerGroups const ref_order{
-            //     {{Idx2D{3, 0}, Idx2D{3, 1}, Idx2D{4, 0}}, {Idx2D{3, 3}, Idx2D{3, 2}, Idx2D{3, 4}}}};
-            // CHECK(order == ref_order);
+            // The test grid 1 is not compatible with the updated logic for step up transformers
             CHECK_THROWS_AS(pgm_tap::rank_transformers(state), AutomaticTapInputError);
         }
     }
+
+    // The test grid 2 is compatible with the updated logic for step up transformers
+    SUBCASE("Full grid 2 - For transformer ranking only") {
+        // =====Test Grid=====
+        // ________[0]________
+        // ||           |    |
+        // [1]         [4]--[5]
+        //  |           |    |
+        // [2]          |   [8]
+        //  |          [6]   |
+        // [3]----[7]---|   [9]
+        //  |                |
+        //  L--------------[10]
+        TestState state;
+        std::vector<NodeInput> nodes{{0, 150e3}, {1, 10e3}, {2, 10e3}, {3, 10e3}, {4, 10e3}, {5, 50e3},
+                                     {6, 10e3},  {7, 10e3}, {8, 10e3}, {9, 10e3}, {10, 10e3}};
+        main_core::add_component<Node>(state, nodes.begin(), nodes.end(), 50.0);
+
+        std::vector<TransformerInput> transformers{
+            get_transformer(11, 0, 1, BranchSide::from), get_transformer(12, 0, 1, BranchSide::from),
+            get_transformer(13, 2, 3, BranchSide::from), get_transformer(14, 6, 7, BranchSide::from),
+            get_transformer(15, 5, 8, BranchSide::from), get_transformer(16, 9, 10, BranchSide::from)};
+        main_core::add_component<Transformer>(state, transformers.begin(), transformers.end(), 50.0);
+
+        std::vector<ThreeWindingTransformerInput> transformers3w{
+            get_transformer3w(17, 0, 4, 5, Branch3Side::side_2, 0)};
+        main_core::add_component<ThreeWindingTransformer>(state, transformers3w.begin(), transformers3w.end(), 50.0);
+
+        std::vector<LineInput> lines{get_line_input(18, 4, 6), get_line_input(19, 3, 10)};
+        main_core::add_component<Line>(state, lines.begin(), lines.end(), 50.0);
+
+        std::vector<LinkInput> links{{20, 1, 2, 1, 1}, {21, 3, 7, 1, 1}, {22, 8, 9, 1, 1}};
+        main_core::add_component<Link>(state, links.begin(), links.end(), 50.0);
+
+        std::vector<SourceInput> sources{{23, 0, 1, 1.0, 0, nan, nan, nan}};
+        main_core::add_component<Source>(state, sources.begin(), sources.end(), 50.0);
+
+        std::vector<TransformerTapRegulatorInput> regulators{
+            get_regulator(24, 11, ControlSide::to),    get_regulator(25, 12, ControlSide::to),
+            get_regulator(26, 13, ControlSide::to),    get_regulator(27, 14, ControlSide::to),
+            get_regulator(28, 15, ControlSide::to),    get_regulator(29, 16, ControlSide::to),
+            get_regulator(30, 17, ControlSide::side_2)};
+        main_core::add_component<TransformerTapRegulator>(state, regulators.begin(), regulators.end(), 50.0);
+
+        state.components.set_construction_complete();
+
+        // Subcases
+        SUBCASE("Ranking complete the graph") {
+            pgm_tap::RankedTransformerGroups order = pgm_tap::rank_transformers(state);
+            pgm_tap::RankedTransformerGroups const ref_order{
+                {{Idx2D{3, 0}, Idx2D{3, 1}, Idx2D{4, 0}, Idx2D{3, 4}}, {Idx2D{3, 2}, Idx2D{3, 3}, Idx2D{3, 5}}}};
+            CHECK(order == ref_order);
+        }
+    }
 }
 
 namespace optimizer::tap_position_optimizer::test {

tests/data/power_flow/automatic-tap-regulator/step-up-transformer-any-valid-tap/input.json

@@ -0,0 +1,26 @@
+{
+  "version": "1.0",
+  "type": "input",
+  "is_batch": false,
+  "attributes": {},
+  "data": {
+    "node": [
+      {"id": 2, "u_rated": 150000},
+      {"id": 4, "u_rated": 10500},
+      {"id": 6, "u_rated": 21000}
+    ],
+    "transformer": [
+      {"id": 3, "from_node": 2, "to_node": 4, "from_status": 1, "to_status": 1, "u1": 150000, "u2": 11000, "sn": 66000000, "uk": 0.199, "pk": 217000, "i0": 1e-3, "p0": 19500, "winding_from": 1, "winding_to": 2, "clock": 5, "tap_side": 0, "tap_pos": -1, "tap_min": -8, "tap_max": 9, "tap_size": 2500},
+      {"id": 5, "from_node": 4, "to_node": 6, "from_status": 1, "to_status": 1, "u1": 10600, "u2": 21000, "sn": 20000000, "uk": 0.119, "pk": 127000, "i0": 1e-03, "p0": 5700, "winding_from": 1, "winding_to": 1, "clock": 2, "tap_side": 1, "tap_pos": 4, "tap_min": -13, "tap_max": 4, "tap_size": 270}
+    ],
+    "sym_load": [
+      {"id": 7, "node": 6, "status": 1, "type": 0, "p_specified": 10000000, "q_specified": 5000000}
+    ],
+    "source": [
+      {"id": 1, "node": 2, "status": 1, "u_ref": 1.0}
+    ],
+    "transformer_tap_regulator": [
+      {"id": 8, "regulated_object": 5, "status": 1, "control_side": 1, "u_set": 21000, "u_band": 522}
+    ]
+  }
+}

tests/data/power_flow/automatic-tap-regulator/step-up-transformer-any-valid-tap/input.json.license

@@ -0,0 +1,3 @@
+SPDX-FileCopyrightText: Contributors to the Power Grid Model project <[email protected]>
+
+SPDX-License-Identifier: MPL-2.0

tests/data/power_flow/automatic-tap-regulator/step-up-transformer-any-valid-tap/params.json

@@ -0,0 +1,10 @@
+{
+  "calculation_method": "newton_raphson",
+  "tap_changing_strategy": "any_valid_tap",
+  "rtol": 1e-05,
+  "atol": 1e-05,
+  "fail": {
+    "raises": "AssertionError",
+    "reason": "Results don't match expected values due to the step up transformer"
+  }
+}

tests/data/power_flow/automatic-tap-regulator/step-up-transformer-any-valid-tap/params.json.license

@@ -0,0 +1,3 @@
+SPDX-FileCopyrightText: Contributors to the Power Grid Model project <[email protected]>
+
+SPDX-License-Identifier: MPL-2.0

tests/data/power_flow/automatic-tap-regulator/step-up-transformer-any-valid-tap/sym_output.json

@@ -0,0 +1,26 @@
+{
+  "version": "1.0",
+  "type": "sym_output",
+  "is_batch": false,
+  "attributes": {},
+  "data": {
+    "node": [
+      {"id": 2, "energized": 1, "u_pu": 0.999278516660926, "u": 149891.7774991389, "u_angle": -4.976276188195561e-08, "p": 10072090.38950087, "q": 6233932.488836197},
+      {"id": 4, "energized": 1, "u_pu": 1.04527504169727, "u": 10975.38793782133, "u_angle": -2.618511710996588, "p": 1.347554049236793e-07, "q": -6.249688283352644e-08},
+      {"id": 6, "energized": 1, "u_pu": 1.000888626113226, "u": 21018.66114837775, "u_angle": -2.618511710996588, "p": -10000000.00000001, "q": -4999999.999999996}
+    ],
+    "transformer": [
+      {"id": 3, "energized": 1, "loading": 0.1794728270763556, "p_from": 10072090.38950087, "q_from": 6233932.488836197, "i_from": 45.62513918866066, "s_from": 11845206.58703947, "p_to": -10045576.12305796, "q_to": -5762159.458271895, "i_to": 609.2000361925834, "s_to": 11580849.76444753},
+      {"id": 5, "energized": 1, "loading": 0.579042488222381, "p_from": 10045576.12305808, "q_from": 5762159.458271859, "i_from": 609.2000361925881, "s_from": 11580849.76444762, "p_to": -10000000.00000001, "q_to": -4999999.999999996, "i_to": 307.1067275936952, "s_to": 11180339.88749895}
+    ],
+    "sym_load": [
+      {"id": 7, "energized": 1, "p": 10000000, "q": 5000000, "i": 307.1067275936951, "s": 11180339.88749895, "pf": 0.8944271909999159}
+    ],
+    "source": [
+      {"id": 1, "energized": 1, "p": 10072090.38950087, "q": 6233932.488836197, "i": 45.62513918866066, "s": 11845206.58703947, "pf": 0.8503093901731802}
+    ],
+    "transformer_tap_regulator": [
+      {"id": 8, "energized": 1, "tap_pos": 0}
+    ]
+  }
+}

tests/data/power_flow/automatic-tap-regulator/step-up-transformer-any-valid-tap/sym_output.json.license

@@ -0,0 +1,3 @@
+SPDX-FileCopyrightText: Contributors to the Power Grid Model project <[email protected]>
+
+SPDX-License-Identifier: MPL-2.0

tests/data/power_flow/automatic-tap-regulator/step-up-transformer-fast-any-tap/input.json

@@ -0,0 +1,26 @@
+{
+  "version": "1.0",
+  "type": "input",
+  "is_batch": false,
+  "attributes": {},
+  "data": {
+    "node": [
+      {"id": 2, "u_rated": 150000},
+      {"id": 4, "u_rated": 10500},
+      {"id": 6, "u_rated": 21000}
+    ],
+    "transformer": [
+      {"id": 3, "from_node": 2, "to_node": 4, "from_status": 1, "to_status": 1, "u1": 150000, "u2": 11000, "sn": 66000000, "uk": 0.199, "pk": 217000, "i0": 1e-3, "p0": 19500, "winding_from": 1, "winding_to": 2, "clock": 5, "tap_side": 0, "tap_pos": -1, "tap_min": -8, "tap_max": 9, "tap_size": 2500},
+      {"id": 5, "from_node": 4, "to_node": 6, "from_status": 1, "to_status": 1, "u1": 10600, "u2": 21000, "sn": 20000000, "uk": 0.119, "pk": 127000, "i0": 1e-03, "p0": 5700, "winding_from": 1, "winding_to": 1, "clock": 2, "tap_side": 1, "tap_pos": 4, "tap_min": -13, "tap_max": 4, "tap_size": 270}
+    ],
+    "sym_load": [
+      {"id": 7, "node": 6, "status": 1, "type": 0, "p_specified": 10000000, "q_specified": 5000000}
+    ],
+    "source": [
+      {"id": 1, "node": 2, "status": 1, "u_ref": 1.0}
+    ],
+    "transformer_tap_regulator": [
+      {"id": 8, "regulated_object": 5, "status": 1, "control_side": 1, "u_set": 21000, "u_band": 522}
+    ]
+  }
+}

tests/data/power_flow/automatic-tap-regulator/step-up-transformer-fast-any-tap/input.json.license

@@ -0,0 +1,3 @@
+SPDX-FileCopyrightText: Contributors to the Power Grid Model project <[email protected]>
+
+SPDX-License-Identifier: MPL-2.0

tests/data/power_flow/automatic-tap-regulator/step-up-transformer-fast-any-tap/params.json

@@ -0,0 +1,10 @@
+{
+  "calculation_method": "newton_raphson",
+  "tap_changing_strategy": "fast_any_tap",
+  "rtol": 1e-05,
+  "atol": 1e-05,
+  "fail": {
+    "raises": "AssertionError",
+    "reason": "Results don't match expected values due to the step up transformer"
+  }
+}

tests/data/power_flow/automatic-tap-regulator/step-up-transformer-fast-any-tap/params.json.license

@@ -0,0 +1,3 @@
+SPDX-FileCopyrightText: Contributors to the Power Grid Model project <[email protected]>
+
+SPDX-License-Identifier: MPL-2.0

tests/data/power_flow/automatic-tap-regulator/step-up-transformer-fast-any-tap/sym_output.json

@@ -0,0 +1,26 @@
+{
+  "version": "1.0",
+  "type": "sym_output",
+  "is_batch": false,
+  "attributes": {},
+  "data": {
+    "node": [
+      {"id": 2, "energized": 1, "u_pu": 0.999278516660926, "u": 149891.7774991389, "u_angle": -4.976276188195561e-08, "p": 10072090.38950087, "q": 6233932.488836197},
+      {"id": 4, "energized": 1, "u_pu": 1.04527504169727, "u": 10975.38793782133, "u_angle": -2.618511710996588, "p": 1.347554049236793e-07, "q": -6.249688283352644e-08},
+      {"id": 6, "energized": 1, "u_pu": 1.000888626113226, "u": 21018.66114837775, "u_angle": -2.618511710996588, "p": -10000000.00000001, "q": -4999999.999999996}
+    ],
+    "transformer": [
+      {"id": 3, "energized": 1, "loading": 0.1794728270763556, "p_from": 10072090.38950087, "q_from": 6233932.488836197, "i_from": 45.62513918866066, "s_from": 11845206.58703947, "p_to": -10045576.12305796, "q_to": -5762159.458271895, "i_to": 609.2000361925834, "s_to": 11580849.76444753},
+      {"id": 5, "energized": 1, "loading": 0.579042488222381, "p_from": 10045576.12305808, "q_from": 5762159.458271859, "i_from": 609.2000361925881, "s_from": 11580849.76444762, "p_to": -10000000.00000001, "q_to": -4999999.999999996, "i_to": 307.1067275936952, "s_to": 11180339.88749895}
+    ],
+    "sym_load": [
+      {"id": 7, "energized": 1, "p": 10000000, "q": 5000000, "i": 307.1067275936951, "s": 11180339.88749895, "pf": 0.8944271909999159}
+    ],
+    "source": [
+      {"id": 1, "energized": 1, "p": 10072090.38950087, "q": 6233932.488836197, "i": 45.62513918866066, "s": 11845206.58703947, "pf": 0.8503093901731802}
+    ],
+    "transformer_tap_regulator": [
+      {"id": 8, "energized": 1, "tap_pos": 0}
+    ]
+  }
+}

tests/data/power_flow/automatic-tap-regulator/step-up-transformer-fast-any-tap/sym_output.json.license

@@ -0,0 +1,3 @@
+SPDX-FileCopyrightText: Contributors to the Power Grid Model project <[email protected]>
+
+SPDX-License-Identifier: MPL-2.0

tests/data/power_flow/automatic-tap-regulator/step-up-transformer-max-voltage-tap/input.json

@@ -0,0 +1,26 @@
+{
+  "version": "1.0",
+  "type": "input",
+  "is_batch": false,
+  "attributes": {},
+  "data": {
+    "node": [
+      {"id": 2, "u_rated": 150000},
+      {"id": 4, "u_rated": 10500},
+      {"id": 6, "u_rated": 21000}
+    ],
+    "transformer": [
+      {"id": 3, "from_node": 2, "to_node": 4, "from_status": 1, "to_status": 1, "u1": 150000, "u2": 11000, "sn": 66000000, "uk": 0.199, "pk": 217000, "i0": 1e-3, "p0": 19500, "winding_from": 1, "winding_to": 2, "clock": 5, "tap_side": 0, "tap_pos": -1, "tap_min": -8, "tap_max": 9, "tap_size": 2500},
+      {"id": 5, "from_node": 4, "to_node": 6, "from_status": 1, "to_status": 1, "u1": 10600, "u2": 21000, "sn": 20000000, "uk": 0.119, "pk": 127000, "i0": 1e-03, "p0": 5700, "winding_from": 1, "winding_to": 1, "clock": 2, "tap_side": 1, "tap_pos": 4, "tap_min": -13, "tap_max": 4, "tap_size": 270}
+    ],
+    "sym_load": [
+      {"id": 7, "node": 6, "status": 1, "type": 0, "p_specified": 10000000, "q_specified": 5000000}
+    ],
+    "source": [
+      {"id": 1, "node": 2, "status": 1, "u_ref": 1.0}
+    ],
+    "transformer_tap_regulator": [
+      {"id": 8, "regulated_object": 5, "status": 1, "control_side": 1, "u_set": 21000, "u_band": 522}
+    ]
+  }
+}

tests/data/power_flow/automatic-tap-regulator/step-up-transformer-max-voltage-tap/input.json.license

@@ -0,0 +1,3 @@
+SPDX-FileCopyrightText: Contributors to the Power Grid Model project <[email protected]>
+
+SPDX-License-Identifier: MPL-2.0

tests/data/power_flow/automatic-tap-regulator/step-up-transformer-max-voltage-tap/params.json

@@ -0,0 +1,10 @@
+{
+  "calculation_method": "newton_raphson",
+  "tap_changing_strategy": "max_voltage_tap",
+  "rtol": 1e-05,
+  "atol": 1e-05,
+  "fail": {
+    "raises": "AssertionError",
+    "reason": "Results don't match expected values due to the step up transformer"
+  }
+}

tests/data/power_flow/automatic-tap-regulator/step-up-transformer-max-voltage-tap/params.json.license

@@ -0,0 +1,3 @@
+SPDX-FileCopyrightText: Contributors to the Power Grid Model project <[email protected]>
+
+SPDX-License-Identifier: MPL-2.0

tests/data/power_flow/automatic-tap-regulator/step-up-transformer-max-voltage-tap/sym_output.json

@@ -0,0 +1,26 @@
+{
+  "version": "1.0",
+  "type": "sym_output",
+  "is_batch": false,
+  "attributes": {},
+  "data": {
+    "node": [
+      {"id": 2, "energized": 1, "u_pu": 0.999278516660926, "u": 149891.7774991389, "u_angle": -4.976276188195561e-08, "p": 10072090.38950087, "q": 6233932.488836197},
+      {"id": 4, "energized": 1, "u_pu": 1.04527504169727, "u": 10975.38793782133, "u_angle": -2.618511710996588, "p": 1.347554049236793e-07, "q": -6.249688283352644e-08},
+      {"id": 6, "energized": 1, "u_pu": 1.000888626113226, "u": 21018.66114837775, "u_angle": -2.618511710996588, "p": -10000000.00000001, "q": -4999999.999999996}
+    ],
+    "transformer": [
+      {"id": 3, "energized": 1, "loading": 0.1794728270763556, "p_from": 10072090.38950087, "q_from": 6233932.488836197, "i_from": 45.62513918866066, "s_from": 11845206.58703947, "p_to": -10045576.12305796, "q_to": -5762159.458271895, "i_to": 609.2000361925834, "s_to": 11580849.76444753},
+      {"id": 5, "energized": 1, "loading": 0.579042488222381, "p_from": 10045576.12305808, "q_from": 5762159.458271859, "i_from": 609.2000361925881, "s_from": 11580849.76444762, "p_to": -10000000.00000001, "q_to": -4999999.999999996, "i_to": 307.1067275936952, "s_to": 11180339.88749895}
+    ],
+    "sym_load": [
+      {"id": 7, "energized": 1, "p": 10000000, "q": 5000000, "i": 307.1067275936951, "s": 11180339.88749895, "pf": 0.8944271909999159}
+    ],
+    "source": [
+      {"id": 1, "energized": 1, "p": 10072090.38950087, "q": 6233932.488836197, "i": 45.62513918866066, "s": 11845206.58703947, "pf": 0.8503093901731802}
+    ],
+    "transformer_tap_regulator": [
+      {"id": 8, "energized": 1, "tap_pos": 0}
+    ]
+  }
+}

tests/data/power_flow/automatic-tap-regulator/step-up-transformer-max-voltage-tap/sym_output.json.license

@@ -0,0 +1,3 @@
+SPDX-FileCopyrightText: Contributors to the Power Grid Model project <[email protected]>
+
+SPDX-License-Identifier: MPL-2.0

tests/data/power_flow/automatic-tap-regulator/step-up-transformer-min-voltage-tap/input.json

@@ -0,0 +1,26 @@
+{
+  "version": "1.0",
+  "type": "input",
+  "is_batch": false,
+  "attributes": {},
+  "data": {
+    "node": [
+      {"id": 2, "u_rated": 150000},
+      {"id": 4, "u_rated": 10500},
+      {"id": 6, "u_rated": 21000}
+    ],
+    "transformer": [
+      {"id": 3, "from_node": 2, "to_node": 4, "from_status": 1, "to_status": 1, "u1": 150000, "u2": 11000, "sn": 66000000, "uk": 0.199, "pk": 217000, "i0": 1e-3, "p0": 19500, "winding_from": 1, "winding_to": 2, "clock": 5, "tap_side": 0, "tap_pos": -1, "tap_min": -8, "tap_max": 9, "tap_size": 2500},
+      {"id": 5, "from_node": 4, "to_node": 6, "from_status": 1, "to_status": 1, "u1": 10600, "u2": 21000, "sn": 20000000, "uk": 0.119, "pk": 127000, "i0": 1e-03, "p0": 5700, "winding_from": 1, "winding_to": 1, "clock": 2, "tap_side": 1, "tap_pos": 4, "tap_min": -13, "tap_max": 4, "tap_size": 270}
+    ],
+    "sym_load": [
+      {"id": 7, "node": 6, "status": 1, "type": 0, "p_specified": 10000000, "q_specified": 5000000}
+    ],
+    "source": [
+      {"id": 1, "node": 2, "status": 1, "u_ref": 1.0}
+    ],
+    "transformer_tap_regulator": [
+      {"id": 8, "regulated_object": 5, "status": 1, "control_side": 1, "u_set": 21000, "u_band": 522}
+    ]
+  }
+}

tests/data/power_flow/automatic-tap-regulator/step-up-transformer-min-voltage-tap/input.json.license

@@ -0,0 +1,3 @@
+SPDX-FileCopyrightText: Contributors to the Power Grid Model project <[email protected]>
+
+SPDX-License-Identifier: MPL-2.0

tests/data/power_flow/automatic-tap-regulator/step-up-transformer-min-voltage-tap/params.json

@@ -0,0 +1,10 @@
+{
+  "calculation_method": "newton_raphson",
+  "tap_changing_strategy": "min_voltage_tap",
+  "rtol": 1e-05,
+  "atol": 1e-05,
+  "fail": {
+    "raises": "AssertionError",
+    "reason": "Results don't match expected values due to the step up transformer"
+  }
+}

tests/data/power_flow/automatic-tap-regulator/step-up-transformer-min-voltage-tap/params.json.license

@@ -0,0 +1,3 @@
+SPDX-FileCopyrightText: Contributors to the Power Grid Model project <[email protected]>
+
+SPDX-License-Identifier: MPL-2.0

tests/data/power_flow/automatic-tap-regulator/step-up-transformer-min-voltage-tap/sym_output.json

@@ -0,0 +1,26 @@
+{
+  "version": "1.0",
+  "type": "sym_output",
+  "is_batch": false,
+  "attributes": {},
+  "data": {
+    "node": [
+      {"id": 2, "energized": 1, "u_pu": 0.999278516660926, "u": 149891.7774991389, "u_angle": -4.976276188195561e-08, "p": 10072090.38950087, "q": 6233932.488836197},
+      {"id": 4, "energized": 1, "u_pu": 1.04527504169727, "u": 10975.38793782133, "u_angle": -2.618511710996588, "p": 1.347554049236793e-07, "q": -6.249688283352644e-08},
+      {"id": 6, "energized": 1, "u_pu": 0.9880200580631995, "u": 20748.42121932719, "u_angle": -2.618511710996588, "p": -10000000.00000001, "q": -4999999.999999996}
+    ],
+    "transformer": [
+      {"id": 3, "energized": 1, "loading": 0.1794728270763556, "p_from": 10072090.38950087, "q_from": 6233932.488836197, "i_from": 45.62513918866066, "s_from": 11845206.58703947, "p_to": -10045576.12305796, "q_to": -5762159.458271895, "i_to": 609.2000361925834, "s_to": 11580849.76444753},
+      {"id": 5, "energized": 1, "loading": 0.579042488222381, "p_from": 10045576.12305808, "q_from": 5762159.458271859, "i_from": 609.2000361925881, "s_from": 11580849.76444762, "p_to": -10000000.00000001, "q_to": -4999999.999999996, "i_to": 311.1066705001248, "s_to": 11180339.88749895}
+    ],
+    "sym_load": [
+      {"id": 7, "energized": 1, "p": 10000000, "q": 5000000, "i": 311.1066705001252, "s": 11180339.88749895, "pf": 0.8944271909999159}
+    ],
+    "source": [
+      {"id": 1, "energized": 1, "p": 10072090.38950087, "q": 6233932.488836197, "i": 45.62513918866066, "s": 11845206.58703947, "pf": 0.8503093901731802}
+    ],
+    "transformer_tap_regulator": [
+      {"id": 8, "energized": 1, "tap_pos": -1}
+    ]
+  }
+}

tests/data/power_flow/automatic-tap-regulator/step-up-transformer-min-voltage-tap/sym_output.json.license

@@ -0,0 +1,3 @@
+SPDX-FileCopyrightText: Contributors to the Power Grid Model project <[email protected]>
+
+SPDX-License-Identifier: MPL-2.0