Renewable Energy Inverter Solution

Application

Description

Comprehensive capacitor solution for renewable energy inverters including DC-link capacitors for energy storage and AC filter capacitors for grid connection.

Core Advantages

Complete capacitor solution from single supplier
Proven reliability in field installations
German engineering quality
Comprehensive technical support

Recommended Bill of Materials (BOM)

Item Part Number Description Quantity Datasheet
1 📄 Download
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3 📄 Download

Applications

Solar inverters
Wind turbine converters
Energy storage systems
Grid-tied converters

Technical Specifications

D C Bus Voltage
800-1000V DC
A C Output Voltage
400V AC 3-phase
Switching Frequency
8-16kHz
Ripple Current
Up to 300A total
Operating Temperature
-25°C to +60°C ambient
Grid Compliance
IEEE 519, IEC 61000-3-6

FAE Expert Insights

M

Michael Chen

Senior FAE - Renewable Energy

12 years

Professional Insights

For renewable energy applications, capacitor reliability is critical due to the 20-25 year expected system lifetime. I always recommend Electronicon's dry-filled capacitors for these applications - the elimination of oil leakage risk is a major advantage for outdoor installations. For DC-link capacitors, proper ripple current calculation is essential. I typically design for 80% of rated ripple current to ensure long lifetime. Thermal management is also critical - ensure adequate airflow and consider derating for high ambient temperatures. For AC filter capacitors, proper detuning reactor selection prevents resonance issues. I recommend 7% detuning (189Hz) for most applications.

Key Takeaways

  • Design for 20-25 year lifetime
  • Use dry-filled capacitors for outdoor installations
  • Apply 20% ripple current margin
  • Ensure proper thermal management
  • Select proper detuning for filters

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Frequently Asked Questions

How do I calculate DC-link capacitance for a solar inverter?

DC-link capacitance C = I_ripple / (2 × π × f_sw × ΔV), where I_ripple is ripple current, f_sw is switching frequency, ΔV is allowable voltage ripple. For 100kW inverter with 10kHz switching and 2% voltage ripple: C ≈ 2000-3000uF. Use multiple capacitors in parallel for high current.

Calculate based on ripple current, switching frequency, and allowable voltage ripple.

What detuning is recommended for harmonic filters?

For renewable energy inverters, 7% detuning (189Hz for 50Hz grid) is standard. This prevents resonance with the 5th harmonic while providing effective filtering. For high-harmonic environments, 14% detuning (134Hz) may be used.

Use 7% detuning for standard applications, 14% for high-harmonic environments.