This month, EB-LINK participated in the optical isolation transformation of a 220kV substation communication network, using optical fiber to safely guide the collection and voice signals scattered in the primary equipment area to the main control room, replacing the copper cable link that originally passed through the high-voltage area.

The difficulty in transformation lies in ground potential and interference

The ground potential difference can reach thousands of volts during substation switching operations. Copper cable serial ports and telephone lines will introduce high voltage into secondary equipment, and the risk of port burnout is high. After switching to optical transceiver, the optical fiber itself is insulated and the potential difference path is completely cut off. This is exactlyOptical isolation renovation of a 220kV substation communication networkThe core idea is also the key reason why optical fiber is the first choice for power sites. After the transformation, the copper cables are basically no longer stretched between the main control room and each partition box, and the high-voltage introduction path is cut off.

Data and voice are separated into separate devices

For serial port signals such as telemetry and remote signaling2-way bidirectional RS485 data optical terminalThe glazing and duty dispatch calls are aggregated by 8-way telephone optical transceivers. The two services are divided into fibers and each occupy an independent channel without affecting each other. In this way, even if one link is expanded or overhauled, the other link will not be implicated, and the operation and maintenance boundary is clear; the optical power of the two links is measured separately, and the cutover can be promoted in batches without having to stop them all at once.

Benefits from renovation

overall plan andCommunication transformation plan for electric power and new energy stationsThe caliber is the same. After the transformation, the serial port and telephone port are no longer damaged due to ground potential differences, and the number of communication interruptions has been significantly reduced. The link status can be judged by pressing the device indicator light on site, turning passive emergency repairs into predictable daily inspections. After the ground potential is cut off by optical fiber, the service life of the secondary equipment port is also significantly extended.

This transformation has verified the isolation value of data and telephony optical transceivers in strong electromagnetic environments; EB-LINK can reserve stocks for power stations and provide working day technical support. The consultation phone number is 0755-83179002.