The key difference lies in their approach to communication: PLCC is a communication technology that uses existing power lines, while OPGW is a physical cable that integrates communication capabilities directly into the power line’s protective ground wire.

• Power Line Carrier Communication (PLCC): This technology superimposes high-frequency signals onto the power conductors of an existing transmission line. It uses the power lines themselves as the communication medium, which is a cost-effective way to establish a communication link between substations without installing new cables.

• Optical Ground Wire (OPGW): This is a dual-function cable that replaces the traditional earth wire at the top of a transmission tower. The metallic part of the OPGW cable provides lightning protection and grounding, while a core of embedded optical fibers handles high-speed data transmission. This provides a dedicated, high-bandwidth communication channel that is immune to electromagnetic interference.

At Ningbo Changshi, we understand the nuances of both technologies. While PLCC systems can be a viable option for certain applications, OPGW cables provide a more reliable and higher-bandwidth solution for modern smart grids. We manufacture and export the essential equipment for both new installations and retrofits, including the specialized tension stringing equipment required for safely and efficiently installing OPGW cables.