What are the EMC challenges of PCS (containerized system for energy storage) containerized systems?

Containerized PCS systems highly integrate multiple power units, transformers, and control systems within a standard container, presenting unique EMC design challenges:

1. High-density integration: High-voltage and low-voltage equipment are densely packed within a confined space, with noise sources close to sensitive equipment, complex coupling paths, and extremely difficult isolation and shielding.

2. Complex internal environment: Multiple frequency converters (PCS, DC-DC converters, auxiliary power supplies) interfere with each other, resulting in a harsh EMI environment within the system.

3. Conflict between heat dissipation and shielding: High power density requires forced air cooling, creating a conflict between numerous ventilation openings and shielding requirements.

4. Dense internal cabling: Numerous internal power and signal lines are difficult to lay and shield effectively.

5. Complex system-level grounding: A unified low-impedance grounding system needs to be established within the container, with proper connection to the external earth and power grid. Solutions require addressing the overall layout, zoned shielding, efficient air cooling design, comprehensive internal cabling management, and system-level filtering and grounding.