Is the grounding of the PCS shielding layer in an energy storage system single-ended or double-ended?

The grounding method (single-ended or double-ended) of the cable shield in a PCS depends on the type of interference and the cable length.

1. Single-ended grounding: The shield is grounded only at one end of the cable (usually at the receiving end or the equipment inlet). This effectively avoids low-frequency ground loop currents and is suitable for suppressing low-frequency magnetic field interference (<100kHz). However, the shielding effect against high-frequency electric fields decreases because the other end is suspended.

2. Double-ended grounding: The shield is grounded at both ends of the cable. This provides a low-impedance return path for high-frequency interference (>1MHz) and provides good shielding, but it can create ground loops, potentially introducing low-frequency ground potential difference interference. For environments with high-frequency noise in the PCS (such as power cables and high-frequency signal lines), double-ended grounding is typically used, ensuring good grounding and low impedance at both ends to minimize loop effects. For long-distance low-frequency analog signals, single-ended grounding can be considered.