Update app.py

app.py

@@ -9,11 +9,13 @@ st.markdown("- Apparent Power (VA)")
 st.markdown("- Real Power (kW)")
 st.markdown("- Power Factor")
 st.markdown("- Reactive Power (kVAR)")
+st.markdown("- Capacitor Rating Recommendation to Compensate Reactive Power")
 
 # Inputs
 voltage = st.number_input("Enter Voltage (V)", min_value=0.0, step=0.1)
 current = st.number_input("Enter Current (A)", min_value=0.0, step=0.1)
 power_factor = st.slider("Power Factor (optional, default = 1)", 0.0, 1.0, 1.0, step=0.01)
+frequency = st.selectbox("Select Frequency", [50, 60], index=0)  # Frequency in Hz
 
 # Calculate button
 if st.button("Calculate"):
@@ -33,14 +35,32 @@ if st.button("Calculate"):
         # Calculated PF (just for verification)
         calculated_pf = real_power * 1000 / apparent_power if apparent_power > 0 else 0
 
+        # Capacitor sizing formula: Q_c = V^2 * (2 * pi * f * C) / 1000
+        # Rearranged to solve for C: C = Q_c * 1000 / (V^2 * 2 * pi * f)
+        if reactive_power > 0:
+            required_capacitance = reactive_power * 1000 / (voltage**2 * 2 * math.pi * frequency)
+            required_capacitance_uF = required_capacitance * 1e6  # Convert to microfarads (uF)
+        else:
+            required_capacitance_uF = 0.0
+
         # Display results
         st.subheader("Results (Single-Phase):")
         st.write(f"🔌 Apparent Power: **{round(apparent_power, 2)} VA**")
         st.write(f"⚡ Real Power: **{round(real_power, 2)} kW**")
         st.write(f"📐 Power Factor: **{round(calculated_pf, 2)}**")
         st.write(f"⚛️ Reactive Power: **{round(reactive_power, 2)} kVAR**")
+
+        # Display the capacitor recommendation
+        if reactive_power > 0:
+            st.subheader("Recommended Capacitor Size:")
+            st.write(f"To compensate the **{round(reactive_power, 2)} kVAR** of reactive power:")
+            st.write(f"💡 Required Capacitor Size: **{round(required_capacitance_uF, 2)} µF**")
+        else:
+            st.write("No compensation needed as reactive power is zero or negative.")
+
     else:
         st.warning("Please enter valid voltage and current values.")
 
 
 
+