How to suppress power line plug-in/plug-out interference in power line carrier PLC?

Suppressing power line insertion/removal interference in power line carrier PLCs requires both hardware filtering and software fault tolerance. On the hardware side, a TVS diode (SMCJ24CA) is deployed at the power line inlet to absorb the instantaneous high voltage generated during insertion/removal. A parallel X capacitor (0.47μF) and a series common-mode inductor (CML3225A-510T) filter out high-frequency oscillations. On the software side, an insertion/removal detection mechanism is added, entering a silent mode upon detecting an anomaly to prevent accidental operation. The transient waveforms during insertion/removal are analyzed through simulation to optimize the protection circuit parameters. In actual testing, 1000 insertion/removal cycles should be performed; the system should show no damage and the communication recovery time should be less than 1 second. Suppressing insertion/removal interference can improve system reliability and extend its service life.