Use measurements from EV chargers when calculating grid power (#172)

... if the ev chargers are directly connected to the grid.

Author: sahas-subramanian-frequenz

pyproject.toml

@@ -74,23 +74,22 @@ line-length = 88
 target-version = ['py38']
 include = '\.pyi?$'
 
-[tool.pylint]
-    [tool.pylint.'SIMILARITIES']
-    ignore-comments=['yes']
-    ignore-docstrings=['yes']
-    ignore-imports=['no']
-    min-similarity-lines=40
+[tool.pylint.similarities]
+ignore-comments=['yes']
+ignore-docstrings=['yes']
+ignore-imports=['no']
+min-similarity-lines=40
 
-    [tool.pylint.messages_control]
-    disable = [
-        "too-few-public-methods",
-        # disabled because it conflicts with isort
-        "wrong-import-order",
-        "ungrouped-imports"
-    ]
+[tool.pylint.messages_control]
+disable = [
+    "too-few-public-methods",
+    # disabled because it conflicts with isort
+    "wrong-import-order",
+    "ungrouped-imports"
+]
 
-    [tool.pylint.'DESIGN']
-    max-attributes=12
+[tool.pylint.design]
+max-attributes=12
 
 [tool.isort]
 profile = "black"

src/frequenz/sdk/timeseries/logical_meter/_formula_generators/_battery_power_formula.py

@@ -46,7 +46,7 @@ async def generate(
         )
 
         if not battery_inverters:
-            logging.warning(
+            logger.warning(
                 "Unable to find any battery inverters in the component graph. "
                 "Subscribing to the resampling actor with a non-existing "
                 "component id, so that `0` values are sent from the formula."

src/frequenz/sdk/timeseries/logical_meter/_formula_generators/_grid_power_formula.py

@@ -53,7 +53,10 @@ async def generate(
             #
             # This is not possible for Meters, so when they produce `None`
             # values, those values get propagated as the output.
-            if comp.category == ComponentCategory.INVERTER:
+            if comp.category in (
+                ComponentCategory.INVERTER,
+                ComponentCategory.EV_CHARGER,
+            ):
                 nones_are_zeros = True
             elif comp.category == ComponentCategory.METER:
                 nones_are_zeros = False

src/frequenz/sdk/timeseries/logical_meter/_formula_generators/_pv_power_formula.py

@@ -36,7 +36,7 @@ async def generate(self) -> FormulaEngine:
         )
 
         if not pv_inverters:
-            logging.warning(
+            logger.warning(
                 "Unable to find any PV inverters in the component graph. "
                 "Subscribing to the resampling actor with a non-existing "
                 "component id, so that `0` values are sent from the formula."