📐 LCL Filter Design (Inverter L1 + Grid L2 + Filter Cap C, Passive Damping -40dB/dec)

Active Front End (AFE) LCL Filter Calculator

Size third-order LCL low-pass harmonic input filters ($L_{inv}, C_f, L_{grid}$) for grid-connected Active Front End regenerative VFDs: calculate resonant frequency ($f_{res} = rac{1}{2 pi} sqrt{rac{L_1 + L_2}{L_1 L_2 C_f}}$ between $10 f_{grid}$ and $0.5 f_{sw}$), size passive series damping resistors preventing control loop oscillation, and power electronics yields.

1. Project & Operating Inputs

AFE Inverter Rating (kVA e.g. 500 kVA Active Front End Converter)

IGBT Switching Frequency (kHz e.g. 8.0 kHz PWM Modulation)

Customer Bid Price for Supplied LCL Filter Assembly ($)

Iron-Core Inductors L1/L2, Polypropylene Capacitors, Damping Resistor ($)

2. Financial Breakdown & Yield

THIRD-ORDER LCL FILTERS

Turnkey LCL Input Filter Skid Profit

Grid-Tied Power Electronics Filter Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Direct Cost