power factor calculator

electronics/power_factor.py

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+import math
+
+
+def calculate_apparent_power(voltage, current):
+    """Calculate the apparent power (S) in volt-amperes (VA)."""
+    try:
+        return voltage * current
+    except TypeError:
+        error_msg = "Invalid input types for voltage or current. Both must be numbers."
+        raise ValueError(error_msg)
+
+
+def calculate_power_factor(real_power, apparent_power):
+    """Calculate the power factor (PF)."""
+    try:
+        if apparent_power == 0:
+            raise ValueError("Apparent power cannot be zero.")
+        return real_power / apparent_power
+    except TypeError:
+        error_msg = (
+            "Invalid input types for real power or apparent power. "
+            "Both must be numbers."
+        )
+        raise ValueError(error_msg)
+
+
+def calculate_reactive_power(real_power, apparent_power):
+    """Calculate the reactive power (Q) in volt-amperes reactive (VAR)."""
+    try:
+        if apparent_power < real_power:
+            raise ValueError(
+                "Apparent power must be greater than or equal to real power."
+            )
+        return math.sqrt(apparent_power**2 - real_power**2)
+    except TypeError:
+        error_msg = (
+            "Invalid input types for real power or apparent power. "
+            "Both must be numbers."
+        )
+        raise ValueError(error_msg)
+    except ValueError as ve:
+        error_msg = f"Calculation error: {ve}"
+        raise ValueError(error_msg)
+
+
+def calculate_correction_capacitance(reactive_power, voltage, frequency=60):
+    """Calculate the size of the correction capacitor in microfarads (µF)."""
+    try:
+        if voltage == 0:
+            raise ValueError("Voltage cannot be zero.")
+        capacitance = (reactive_power * 1_000_000) / (
+            2 * math.pi * frequency * voltage**2
+        )
+        return capacitance
+    except TypeError:
+        error_msg = (
+            "Invalid input types for reactive power, voltage, or "
+            "frequency. They must be numbers."
+        )
+        raise ValueError(error_msg)
+    except ValueError as ve:
+        error_msg = f"Calculation error: {ve}"
+        raise ValueError(error_msg)
+
+
+def main():
+    try:
+        real_power = float(input("Enter real power in watts: "))
+        current = float(input("Enter current in amps: "))
+        voltage = float(input("Enter voltage in volts: "))
+
+        apparent_power = calculate_apparent_power(voltage, current)
+        power_factor = calculate_power_factor(real_power, apparent_power)
+        reactive_power = calculate_reactive_power(real_power, apparent_power)
+        correction_capacitance = calculate_correction_capacitance(
+            reactive_power, voltage
+        )
+
+        print("\nResults:")
+        print(f"Power Factor: {power_factor:.4f}")
+        print(f"Apparent Power: {apparent_power:.0f} VA")
+        print(f"Reactive Power: {reactive_power:.0f} VAR")
+        print(f"Correction Capacitance: {correction_capacitance:.3f} µF")
+
+    except ValueError as e:
+        print(f"Error: {e}")
+
+
+if __name__ == "__main__":
+    main()