Add reactive power for inverters, meters and EV chargers (#30)

Fixes #28.

Author: llucax

README.md

@@ -6,9 +6,10 @@
 
 ## Introduction
 
-Microgrid API client for Python
-
-TODO(cookiecutter): Improve the README file
+This project provides a Python client for the [Frequenz Microgrid
+API](https://frequenz-floss.github.io/frequenz-api-microgrid/) that is more
+idiomatic to use in Python than the automatically-generated gRPC client
+provided by `protoc`.
 
 ## Supported Platforms
 

RELEASE_NOTES.md

@@ -1,17 +1,5 @@
 # Frequenz Microgrid API Client Release Notes
 
-## Summary
-
-<!-- Here goes a general summary of what this release is about -->
-
-## Upgrading
-
-<!-- Here goes notes on how to upgrade from previous versions, including deprecations and what they should be replaced with -->
-
 ## New Features
 
-<!-- Here goes the main new features and examples or instructions on how to use them -->
-
-## Bug Fixes
-
-<!-- Here goes notable bug fixes that are worth a special mention or explanation -->
+- The `reactive_power` is exposed for meters, inverters and EV chargers.

src/frequenz/client/microgrid/_component.py

@@ -207,6 +207,16 @@ class ComponentMetricId(Enum):
     ACTIVE_POWER_PHASE_3 = "active_power_phase_3"
     """Active power in phase 3."""
 
+    REACTIVE_POWER = "reactive_power"
+    """Reactive power."""
+
+    REACTIVE_POWER_PHASE_1 = "reactive_power_phase_1"
+    """Reactive power in phase 1."""
+    REACTIVE_POWER_PHASE_2 = "reactive_power_phase_2"
+    """Reactive power in phase 2."""
+    REACTIVE_POWER_PHASE_3 = "reactive_power_phase_3"
+    """Reactive power in phase 3."""
+
     CURRENT_PHASE_1 = "current_phase_1"
     """Current in phase 1."""
     CURRENT_PHASE_2 = "current_phase_2"

src/frequenz/client/microgrid/_component_data.py

@@ -70,18 +70,46 @@ class MeterData(ComponentData):
     """A wrapper class for holding meter data."""
 
     active_power: float
-    """The 3-phase active power, in Watts, represented in the passive sign convention.
-            +ve current means consumption, away from the grid.
-            -ve current means supply into the grid.
+    """The total active 3-phase AC power, in Watts (W).
+
+    Represented in the passive sign convention.
+
+    * Positive means consumption from the grid.
+    * Negative means supply into the grid.
     """
 
     active_power_per_phase: tuple[float, float, float]
-    """The AC active power for phase/line 1,2 and 3 respectively."""
+    """The per-phase AC active power for phase 1, 2, and 3 respectively, in Watt (W).
+
+    Represented in the passive sign convention.
+
+    * Positive means consumption from the grid.
+    * Negative means supply into the grid.
+    """
+
+    reactive_power: float
+    """The total reactive 3-phase AC power, in Volt-Ampere Reactive (VAr).
+
+    * Positive power means capacitive (current leading w.r.t. voltage).
+    * Negative power means inductive (current lagging w.r.t. voltage).
+    """
+
+    reactive_power_per_phase: tuple[float, float, float]
+    """The per-phase AC reactive power, in Volt-Ampere Reactive (VAr).
+
+    The provided values are for phase 1, 2, and 3 respectively.
+
+    * Positive power means capacitive (current leading w.r.t. voltage).
+    * Negative power means inductive (current lagging w.r.t. voltage).
+    """
 
     current_per_phase: tuple[float, float, float]
     """AC current in Amperes (A) for phase/line 1,2 and 3 respectively.
-            +ve current means consumption, away from the grid.
-            -ve current means supply into the grid.
+
+    Represented in the passive sign convention.
+
+    * Positive means consumption from the grid.
+    * Negative means supply into the grid.
     """
 
     voltage_per_phase: tuple[float, float, float]
@@ -111,6 +139,12 @@ def from_proto(cls, raw: PbComponentData) -> Self:
                 raw.meter.data.ac.phase_2.power_active.value,
                 raw.meter.data.ac.phase_3.power_active.value,
             ),
+            reactive_power=raw.meter.data.ac.power_reactive.value,
+            reactive_power_per_phase=(
+                raw.meter.data.ac.phase_1.power_reactive.value,
+                raw.meter.data.ac.phase_2.power_reactive.value,
+                raw.meter.data.ac.phase_3.power_reactive.value,
+            ),
             current_per_phase=(
                 raw.meter.data.ac.phase_1.current.value,
                 raw.meter.data.ac.phase_2.current.value,
@@ -241,18 +275,46 @@ class InverterData(ComponentData):  # pylint: disable=too-many-instance-attribut
     """A wrapper class for holding inverter data."""
 
     active_power: float
-    """The 3-phase active power, in Watts, represented in the passive sign convention.
-            +ve current means consumption, away from the grid.
-            -ve current means supply into the grid.
+    """The total active 3-phase AC power, in Watts (W).
+
+    Represented in the passive sign convention.
+
+    * Positive means consumption from the grid.
+    * Negative means supply into the grid.
     """
 
     active_power_per_phase: tuple[float, float, float]
-    """The AC active power for phase/line 1, 2 and 3 respectively."""
+    """The per-phase AC active power for phase 1, 2, and 3 respectively, in Watt (W).
+
+    Represented in the passive sign convention.
+
+    * Positive means consumption from the grid.
+    * Negative means supply into the grid.
+    """
+
+    reactive_power: float
+    """The total reactive 3-phase AC power, in Volt-Ampere Reactive (VAr).
+
+    * Positive power means capacitive (current leading w.r.t. voltage).
+    * Negative power means inductive (current lagging w.r.t. voltage).
+    """
+
+    reactive_power_per_phase: tuple[float, float, float]
+    """The per-phase AC reactive power, in Volt-Ampere Reactive (VAr).
+
+    The provided values are for phase 1, 2, and 3 respectively.
+
+    * Positive power means capacitive (current leading w.r.t. voltage).
+    * Negative power means inductive (current lagging w.r.t. voltage).
+    """
 
     current_per_phase: tuple[float, float, float]
     """AC current in Amperes (A) for phase/line 1, 2 and 3 respectively.
-            +ve current means consumption, away from the grid.
-            -ve current means supply into the grid.
+
+    Represented in the passive sign convention.
+
+    * Positive means consumption from the grid.
+    * Negative means supply into the grid.
     """
 
     voltage_per_phase: tuple[float, float, float]
@@ -335,6 +397,12 @@ def from_proto(cls, raw: PbComponentData) -> Self:
                 raw.inverter.data.ac.phase_2.power_active.value,
                 raw.inverter.data.ac.phase_3.power_active.value,
             ),
+            reactive_power=raw.inverter.data.ac.power_reactive.value,
+            reactive_power_per_phase=(
+                raw.inverter.data.ac.phase_1.power_reactive.value,
+                raw.inverter.data.ac.phase_2.power_reactive.value,
+                raw.inverter.data.ac.phase_3.power_reactive.value,
+            ),
             current_per_phase=(
                 raw.inverter.data.ac.phase_1.current.value,
                 raw.inverter.data.ac.phase_2.current.value,
@@ -363,18 +431,46 @@ class EVChargerData(ComponentData):  # pylint: disable=too-many-instance-attribu
     """A wrapper class for holding ev_charger data."""
 
     active_power: float
-    """The 3-phase active power, in Watts, represented in the passive sign convention.
-        +ve current means consumption, away from the grid.
-        -ve current means supply into the grid.
+    """The total active 3-phase AC power, in Watts (W).
+
+    Represented in the passive sign convention.
+
+    * Positive means consumption from the grid.
+    * Negative means supply into the grid.
     """
 
     active_power_per_phase: tuple[float, float, float]
-    """The AC active power for phase/line 1,2 and 3 respectively."""
+    """The per-phase AC active power for phase 1, 2, and 3 respectively, in Watt (W).
+
+    Represented in the passive sign convention.
+
+    * Positive means consumption from the grid.
+    * Negative means supply into the grid.
+    """
 
     current_per_phase: tuple[float, float, float]
     """AC current in Amperes (A) for phase/line 1,2 and 3 respectively.
-        +ve current means consumption, away from the grid.
-        -ve current means supply into the grid.
+
+    Represented in the passive sign convention.
+
+    * Positive means consumption from the grid.
+    * Negative means supply into the grid.
+    """
+
+    reactive_power: float
+    """The total reactive 3-phase AC power, in Volt-Ampere Reactive (VAr).
+
+    * Positive power means capacitive (current leading w.r.t. voltage).
+    * Negative power means inductive (current lagging w.r.t. voltage).
+    """
+
+    reactive_power_per_phase: tuple[float, float, float]
+    """The per-phase AC reactive power, in Volt-Ampere Reactive (VAr).
+
+    The provided values are for phase 1, 2, and 3 respectively.
+
+    * Positive power means capacitive (current leading w.r.t. voltage).
+    * Negative power means inductive (current lagging w.r.t. voltage).
     """
 
     voltage_per_phase: tuple[float, float, float]
@@ -455,6 +551,12 @@ def from_proto(cls, raw: PbComponentData) -> Self:
                 raw.ev_charger.data.ac.phase_2.power_active.value,
                 raw.ev_charger.data.ac.phase_3.power_active.value,
             ),
+            reactive_power=raw.ev_charger.data.ac.power_reactive.value,
+            reactive_power_per_phase=(
+                raw.ev_charger.data.ac.phase_1.power_reactive.value,
+                raw.ev_charger.data.ac.phase_2.power_reactive.value,
+                raw.ev_charger.data.ac.phase_3.power_reactive.value,
+            ),
             current_per_phase=(
                 raw.ev_charger.data.ac.phase_1.current.value,
                 raw.ev_charger.data.ac.phase_2.current.value,

tests/test_component_data.py

@@ -52,20 +52,28 @@ def test_inverter_data() -> None:
                         system_exclusion_bounds=Bounds(lower=-501.0, upper=501.0),
                         system_inclusion_bounds=Bounds(lower=-51_000.0, upper=51_000.0),
                     ),
+                    power_reactive=Metric(
+                        value=200.3,
+                        system_exclusion_bounds=Bounds(lower=-502.0, upper=502.0),
+                        system_inclusion_bounds=Bounds(lower=-52_000.0, upper=52_000.0),
+                    ),
                     phase_1=AC.ACPhase(
                         current=Metric(value=12.3),
                         voltage=Metric(value=229.8),
                         power_active=Metric(value=33.1),
+                        power_reactive=Metric(value=10.1),
                     ),
                     phase_2=AC.ACPhase(
                         current=Metric(value=23.4),
                         voltage=Metric(value=230.0),
                         power_active=Metric(value=33.3),
+                        power_reactive=Metric(value=10.2),
                     ),
                     phase_3=AC.ACPhase(
                         current=Metric(value=34.5),
                         voltage=Metric(value=230.2),
                         power_active=Metric(value=33.8),
+                        power_reactive=Metric(value=10.3),
                     ),
                 ),
             ),
@@ -84,6 +92,8 @@ def test_inverter_data() -> None:
     assert inv_data.frequency == pytest.approx(50.1)
     assert inv_data.active_power == pytest.approx(100.2)
     assert inv_data.active_power_per_phase == pytest.approx((33.1, 33.3, 33.8))
+    assert inv_data.reactive_power == pytest.approx(200.3)
+    assert inv_data.reactive_power_per_phase == pytest.approx((10.1, 10.2, 10.3))
     assert inv_data.current_per_phase == pytest.approx((12.3, 23.4, 34.5))
     assert inv_data.voltage_per_phase == pytest.approx((229.8, 230.0, 230.2))
     assert inv_data.active_power_inclusion_lower_bound == pytest.approx(-51_000.0)