Fix reported ignored target V and perform inconsistent target V checks

src/main/java/com/powsybl/openloadflow/network/impl/LfNetworkLoaderImpl.java

@@ -176,7 +176,8 @@ private static void checkAndCreateVoltageControl(LfBus controllerBus,
                 .anyMatch(lfGenerator -> !checkUniqueControlledBus(controlledBus, lfGenerator.getControlledBus(), controllerBus, parameters.isDisableInconsistentVoltageControls()));
 
         // Check if target voltage is the same for the generators of current controller bus which have voltage control on
-        boolean inconsistentTargetVoltages = !inconsistentControlledBus && voltageControlGenerators.stream().skip(1)
+        boolean inconsistentTargetVoltages = voltageControlGenerators.stream().skip(1)
+                .filter(lfGenerator -> Objects.equals(lfGenerator.getControlledBus(), controlledBus))
                 .anyMatch(lfGenerator -> !checkUniqueTargetVControllerBus(lfGenerator, controllerTargetV, controllerBus, lfGenerator.getControlledBus(), parameters.isDisableInconsistentVoltageControls()));
 
         if (parameters.isDisableInconsistentVoltageControls() && (inconsistentControlledBus || inconsistentTargetVoltages)) {
@@ -248,10 +249,10 @@ private static void checkUniqueTargetVControlledBus(double controllerTargetV, Lf
         if (deltaTargetV * controlledBus.getNominalV() > TARGET_V_EPSILON) {
             String busesId = vc.getControllerElements().stream().map(LfBus::getId).collect(Collectors.joining(", "));
             LOGGER.error("Bus '{}' control voltage of bus '{}' which is already controlled by buses '{}' with a different target voltage: {} (kept) and {} (ignored)",
-                    controllerBus.getId(), controlledBus.getId(), busesId, controllerTargetV * controlledBus.getNominalV(),
-                    voltageControlTargetV * controlledBus.getNominalV());
-            Reports.reportBusAlreadyControlledWithDifferentTargetV(controllerBus.getNetwork().getReportNode(), controllerBus.getId(), controlledBus.getId(), busesId, controllerTargetV * controlledBus.getNominalV(),
-                    voltageControlTargetV * controlledBus.getNominalV());
+                    controllerBus.getId(), controlledBus.getId(), busesId, voltageControlTargetV * controlledBus.getNominalV(),
+                    controllerTargetV * controlledBus.getNominalV());
+            Reports.reportBusAlreadyControlledWithDifferentTargetV(controllerBus.getNetwork().getReportNode(), controllerBus.getId(), controlledBus.getId(), busesId, voltageControlTargetV * controlledBus.getNominalV(),
+                    controllerTargetV * controlledBus.getNominalV());
         }
     }
 

src/test/java/com/powsybl/openloadflow/ac/GeneratorTargetVoltageInconsistencyTest.java

@@ -14,6 +14,7 @@
 import com.powsybl.openloadflow.network.impl.Networks;
 import com.powsybl.openloadflow.util.LoadFlowAssert;
 import com.powsybl.openloadflow.util.PerUnit;
+import com.powsybl.openloadflow.util.report.PowsyblOpenLoadFlowReportResourceBundle;
 import org.junit.jupiter.api.Test;
 
 import java.io.IOException;
@@ -357,4 +358,49 @@ void remoteAndLocalTestWithDisabling() {
         LoadFlowAssert.assertReportContains(".*Generators \\[g1\\, g2\\] are connected to the same bus vl1\\_0 but control the voltage of different buses \\(vl1\\_0 and vl2\\_0\\)\\: disabling voltage control", reportNode);
         assertEquals(150.0, lfNetwork.getBusById("vl1_0").getGenerationTargetQ() * PerUnit.SB);
     }
+
+    @Test
+    void remoteAndLocalTestWithInconsistentTargetVoltage() throws IOException {
+        Network network = createLocalInconsistentTargetVoltageNetwork();
+        Generator g2 = network.getGenerator("g2");
+        g2.setRegulatingTerminal(network.getLoad("ld2").getTerminal()).setTargetV(400.0);
+        VoltageLevel vl1 = network.getVoltageLevel("vl1");
+        vl1.newGenerator()
+                .setId("g3")
+                .setBus("b1")
+                .setConnectableBus("b1")
+                .setEnergySource(EnergySource.THERMAL)
+                .setMinP(0)
+                .setMaxP(200)
+                .setTargetP(100)
+                .setTargetV(24)
+                .setVoltageRegulatorOn(true)
+                .add();
+
+        LfNetworkParameters parameters = new LfNetworkParameters()
+                .setGeneratorVoltageRemoteControl(true);
+
+        ReportNode reportNode = ReportNode.newRootReportNode()
+                .withResourceBundles(PowsyblOpenLoadFlowReportResourceBundle.BASE_NAME, PowsyblTestReportResourceBundle.TEST_BASE_NAME)
+                .withMessageTemplate("testReport")
+                .build();
+        List<LfNetwork> networkList = Networks.load(network, parameters, reportNode);
+        LfNetwork lfNetwork = networkList.get(0);
+        LfBus lfBus = lfNetwork.getBusById("vl1_0");
+        Optional<GeneratorVoltageControl> sharedVoltageControl = lfBus.getGeneratorVoltageControl();
+        assertTrue(sharedVoltageControl.isPresent());
+        LoadFlowAssert.assertTxtReportEquals("""
+                        + Test Report
+                           + Network CC0 SC0
+                              Generators [g1, g2, g3] are connected to the same bus vl1_0 but control the voltage of different buses: vl1_0 (kept) and vl2_0 (rejected)
+                              Generators [g1, g2, g3] are connected to the same bus vl1_0 with different target voltages: 23 kV (kept) and 24 kV (rejected)
+                              + Network info
+                                 Network has 2 buses and 1 branches
+                                 Network balance: active generation=300 MW, active load=99.9 MW, reactive generation=0 MVar, reactive load=80 MVar
+                                 Angle reference bus: vl1_0
+                                 Slack bus: vl1_0
+                        """,
+                reportNode);
+        assertEquals(23.0, sharedVoltageControl.get().getTargetValue() * lfBus.getNominalV());
+    }
 }

src/test/resources/busAlreadyControlledWithDifferentTargetVReport.txt

@@ -1,6 +1,6 @@
 + Test Report
    + Network CC0 SC0
-      Bus vl1_0 controls voltage of bus vl2_0 which is already controlled by buses [vl2_0, vl1_0] with a different target voltage: 412 kV (kept) and 413 kV (ignored)
+      Bus vl1_0 controls voltage of bus vl2_0 which is already controlled by buses [vl2_0, vl1_0] with a different target voltage: 413 kV (kept) and 412 kV (ignored)
       + Network info
          Network has 3 buses and 2 branches
          Network balance: active generation=200 MW, active load=99.9 MW, reactive generation=0 MVar, reactive load=80 MVar