Scientific Power Supply System Construction in Expressway Development
In expressway construction, the scientific design and standardized implementation of power supply systems are critical to ensuring road accessibility and normal service area operations. With economic growth and technological advancements, power supply engineering is progressively evolving toward efficiency, energy conservation, and environmental sustainability.
(1) External Power Supply Engineering and Mode Selection
Expressways are typically constructed in areas distant from urban centers, where power supply often relies on nearby agricultural or residential grids. While this approach reduces initial investment compared to dedicated high-voltage lines, it historically faced challenges due to grid instability. Following rural grid upgrades, power quality has significantly improved, making localized power sourcing a preferred solution. Additionally, to ensure critical equipment operates uninterrupted during main power failures, expressways employ dual-power supply systems, with diesel generator sets serving as backup power sources.
(2) Composition of Power Distribution Systems
The power distribution system comprises substations and transmission line designs. Substations are equipped with low-voltage distribution cabinets, transformers, diesel generator sets, and in some cases, 10KV high-voltage ring main units. The GCS-type low-voltage distribution cabinet has become the preferred modern solution due to its superior performance. Main transformers increasingly adopt fully sealed oil-immersed or maintenance-free dry-type designs to minimize operational costs.
Expressway power supply construction is a systematic endeavor involving design, implementation, and maintenance. As expressways rapidly develop, power system design increasingly prioritizes functionality and user-centricity. Concurrently, technological advancements drive continuous upgrades in electrical equipment, fostering smarter and more efficient solutions. Through scientific design, standardized construction, and diligent maintenance, expressway power supply systems can achieve stable operation, ensuring uninterrupted road services and reliable support for service area functionality.
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