How to improve the conducted disturbance rejection (CS) of the power storage system (PCS)?

Improving the PCS's conducted immunity (CS, such as IEC 61000-4-6) hinges on preventing external RF interference from coupling into the internal circuitry via cables. Improvement measures include:

1. Strengthening port filtering: Installing high-frequency filters at all power and signal line entry points. For example, using common-mode inductors with Y capacitors at power ports; using common-mode chokes (such as the CML series) at signal ports. The filter cutoff frequency should be lower than the test interference frequency (typically 150kHz-80MHz).

2. Optimizing filter grounding: The grounding terminals of filter capacitors (especially Y capacitors) must be connected to a low-impedance reference ground (usually the chassis) via the shortest path; this is crucial for the filter's effectiveness.

3. Proper shielding: Using shielding for all cables and grounding them 360 degrees at the equipment entry points to bypass interference to the chassis.

4. Circuit robustness: For sensitive internal circuits, such as sampling and communication circuits, employ differential design, increase filter capacitors, and utilize software filtering algorithms to enhance their inherent anti-interference capabilities.