How to maintain continuous connection when the voltage of a power line carrier PLC suddenly drops?

Power line carrier PLCs require power redundancy and software fault tolerance to maintain uninterrupted connection during voltage dips. A wide-voltage input power module (85-265VAC) is used, with a large-capacity capacitor (e.g., 10000μF) added to the DC side for energy storage. A UPS or supercapacitor backup is deployed to maintain power supply in case of mains failure. On the software side, a connection retention mechanism is added for rapid reconnection after a brief disconnection. Testing simulates a voltage dip to 50% for 10ms; the system should maintain connection. Voltage dip immunity design ensures stable operation during grid fluctuations, improving availability.