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90
electronics/power_factor.py
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90
electronics/power_factor.py
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import math
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def calculate_apparent_power(voltage, current):
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"""Calculate the apparent power (S) in volt-amperes (VA)."""
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try:
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return voltage * current
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except TypeError:
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error_msg = "Invalid input types for voltage or current. Both must be numbers."
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raise ValueError(error_msg)
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def calculate_power_factor(real_power, apparent_power):
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"""Calculate the power factor (PF)."""
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try:
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if apparent_power == 0:
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raise ValueError("Apparent power cannot be zero.")
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return real_power / apparent_power
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except TypeError:
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error_msg = (
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"Invalid input types for real power or apparent power. "
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"Both must be numbers."
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)
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raise ValueError(error_msg)
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def calculate_reactive_power(real_power, apparent_power):
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"""Calculate the reactive power (Q) in volt-amperes reactive (VAR)."""
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try:
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if apparent_power < real_power:
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raise ValueError(
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"Apparent power must be greater than or equal to real power."
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)
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return math.sqrt(apparent_power**2 - real_power**2)
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except TypeError:
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error_msg = (
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"Invalid input types for real power or apparent power. "
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"Both must be numbers."
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)
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raise ValueError(error_msg)
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except ValueError as ve:
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error_msg = f"Calculation error: {ve}"
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raise ValueError(error_msg)
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def calculate_correction_capacitance(reactive_power, voltage, frequency=60):
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"""Calculate the size of the correction capacitor in microfarads (µF)."""
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try:
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if voltage == 0:
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raise ValueError("Voltage cannot be zero.")
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capacitance = (reactive_power * 1_000_000) / (
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2 * math.pi * frequency * voltage**2
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)
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return capacitance
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except TypeError:
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error_msg = (
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"Invalid input types for reactive power, voltage, or "
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"frequency. They must be numbers."
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)
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raise ValueError(error_msg)
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except ValueError as ve:
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error_msg = f"Calculation error: {ve}"
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raise ValueError(error_msg)
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def main():
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try:
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real_power = float(input("Enter real power in watts: "))
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current = float(input("Enter current in amps: "))
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voltage = float(input("Enter voltage in volts: "))
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apparent_power = calculate_apparent_power(voltage, current)
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power_factor = calculate_power_factor(real_power, apparent_power)
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reactive_power = calculate_reactive_power(real_power, apparent_power)
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correction_capacitance = calculate_correction_capacitance(
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reactive_power, voltage
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)
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print("\nResults:")
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print(f"Power Factor: {power_factor:.4f}")
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print(f"Apparent Power: {apparent_power:.0f} VA")
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print(f"Reactive Power: {reactive_power:.0f} VAR")
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print(f"Correction Capacitance: {correction_capacitance:.3f} µF")
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except ValueError as e:
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print(f"Error: {e}")
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if __name__ == "__main__":
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main()
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