Optical Phase Conductor (OPPC) cable is a specialized type of power line cable that integrates optical fibers into a traditional phase conductor (live wire) used in electrical transmission and distribution systems. Unlike Optical Ground Wire (OPGW), which replaces the ground wire in overhead power lines, OPPC replaces one of the phase conductors, enabling simultaneous power transmission and high-speed data communication through the same cable. This dual functionality makes OPPC a versatile solution for modernizing grids and supporting smart grid applications. When OPGW or ADSS cables cannot be used, OPPC cable offers an alternative overhead self-supporting solution. Due to its excellent performance in low- and medium-voltage power grids, this type of cable is widely used in transmission lines. Hunan Jiahome provides an overview of OPPC cable as below:
What is OPPC Cable?
Optical Phase Conductor (OPPC) cable is a type of optical cable that combines both power transmission and communication functions. OPPC cables are specifically designed for short, medium, and long-distance overhead self-supporting applications.
The basic structure of OPPC is similar to that of traditional OPGW cables, but it is engineered to replicate the mechanical and electrical characteristics of the phase conductors it replaces. Unlike OPGW, which does not carry continuous electrical current, OPPC cables are energized along with the high-voltage power lines. Therefore, specially adapted splice boxes and insulators are required to accommodate live-line conditions.
The stainless-steel tube structure of OPPC cables consists of single or double layers of aluminum-clad steel (ACS) wires, or a combination of ACS wires and aluminum alloy wires, embedding the optical fibers.
Features and Advantages of OPPC Cables
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Structural Replacement: The stainless-steel tube replaces one or more conventional transmission wires, wrapped with AS/steel wires and AL/AA wires.
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Phase Line Replacement: In a three-phase power system, OPPC cable can replace one phase conductor, creating a transmission line consisting of two conductors plus one OPPC cable.
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High-Temperature Resistance: OPPC cables are capable of withstanding continuous high temperatures, verified through thermal cycling tests.
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Electrical Corrosion Resistance: No incidents of electric corrosion, cable damage, or fiber breakage caused by electric field effects.
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Energy Efficiency: Installing OPPC within phase conductors optimizes transmission line design, delivering significant energy-saving benefits.
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Strong Tensile Strength: OPPC cables provide robust optical path protection with high tensile performance.
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High Communication Capacity and Reliability: Offering large transmission capacity, high communication quality, and excellent system reliability.
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Compatibility: Suitable for all types of optical fibers, whether single-mode or multimode.
Applications of OPPC Cables
OPPC cables are mainly used for transmission lines at voltage levels below 110kV, suburban distribution networks, building automation substations, rural electrification projects.
Retrofitting Existing Lines: Upgrades aging phase conductors without requiring additional space or towers.
Distribution Networks: Commonly used in medium-voltage (11–33 kV) distribution systems.
Smart Grids: Supports real-time monitoring, fault detection, and demand-response systems.
Renewable Integration: Facilitates communication between distributed energy resources (e.g., solar farms) and grid operators.
Post time: Apr-28-2025