Add missing log message for generators discarded from active power control because targetP < minP (#1200)

Signed-off-by: PRABAKARAN Sylvestre <[email protected]>

Author: SylvestreSakti

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

@@ -361,15 +361,17 @@ public void setParticipating(boolean participating) {
     public static boolean checkActivePowerControl(String generatorId, double targetP, double maxP,
                                                   double minTargetP, double maxTargetP, double plausibleActivePowerLimit,
                                                   boolean useActiveLimits, LfNetworkLoadingReport report) {
-        boolean participating = true;
         if (Math.abs(targetP) < POWER_EPSILON_SI) {
+            // if generator is not started, it is not participating, and we can skip the rest of the checks
             LOGGER.trace("Discard generator '{}' from active power control because targetP ({} MW) equals 0",
                     generatorId, targetP);
             if (report != null) {
                 report.generatorsDiscardedFromActivePowerControlBecauseTargetEqualsToZero++;
             }
-            participating = false;
+            return false;
         }
+
+        boolean participating = true;
         if (maxP > plausibleActivePowerLimit) {
             // note that we still want this check applied even if active power limits are not to be enforced,
             // e.g. in case of distribution modes proportional to maxP or remaining margin, we don't want to introduce crazy high participation

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

@@ -1018,6 +1018,10 @@ private LfNetwork create(int numCC, int numSC, Network network, List<Bus> buses,
             LOGGER.warn("Network {}: {} generators have been discarded from active power control because of a targetP > maxP",
                     lfNetwork, report.generatorsDiscardedFromActivePowerControlBecauseTargetPGreaterThanMaxP);
         }
+        if (report.generatorsDiscardedFromActivePowerControlBecauseTargetPLowerThanMinP > 0) {
+            LOGGER.warn("Network {}: {} generators have been discarded from active power control because of a targetP < minP",
+                    lfNetwork, report.generatorsDiscardedFromActivePowerControlBecauseTargetPLowerThanMinP);
+        }
         if (report.generatorsDiscardedFromActivePowerControlBecauseMaxPNotPlausible > 0) {
             LOGGER.warn("Network {}: {} generators have been discarded from active power control because of maxP not plausible",
                     lfNetwork, report.generatorsDiscardedFromActivePowerControlBecauseMaxPNotPlausible);