Pass through zero-power requests in the PowerDistributingActor

Signed-off-by: Sahas Subramanian <[email protected]>

Author: shsms

src/frequenz/sdk/actor/power_distributing/_distribution_algorithm/_battery_distribution_algorithm.py

@@ -685,7 +685,16 @@ def distribute_power(
         Returns:
             Distribution result
         """
-        if power >= 0.0:
+        if is_close_to_zero(power):
+            return DistributionResult(
+                distribution={
+                    inverter.component_id: 0.0
+                    for _, inverters in components
+                    for inverter in inverters
+                },
+                remaining_power=0.0,
+            )
+        if power > 0.0:
             return self._distribute_consume_power(power, components)
         return self._distribute_supply_power(power, components)
 

tests/actor/power_distributing/test_battery_distribution_algorithm.py

@@ -1039,6 +1039,11 @@ def test_scenario_1(self) -> None:
 
         algorithm = BatteryDistributionAlgorithm()
 
+        self.assert_result(
+            algorithm.distribute_power(0, components),
+            DistributionResult({1: 0, 3: 0, 5: 0}, remaining_power=0.0),
+        )
+
         self.assert_result(
             algorithm.distribute_power(-300, components),
             DistributionResult({1: -100, 3: -100, 5: -100}, remaining_power=0.0),