Directly-Buried Photovoltaic Cables: Definition, Characteristics, Maintenance, and Selection
In centralized photovoltaic power plants and large - scale ground - based power plants, directly - buried photovoltaic cables are extensively utilized. Their advantage lies in not occupying surface space and being less affected by ultraviolet rays and climate conditions. However, once these cables are buried underground, it becomes challenging to visually assess their operating status. Issues such as insulation aging, sheath damage, or local abnormal stress often remain hidden and develop over time. Hence, the key to maintaining directly - buried photovoltaic cables is to control risks at an early stage through scientific management and forward - looking judgment.
DefinselbaC ciaition of Directly - Buried Photovoltaic Cables
Directly - buried photovoltaic cables are special cables laid directly underground during the construction of photovoltaic power plants. They are primarily used for power transmission between components and combiner boxes, between combiner boxes and inverters, and between inverters and step - up or grid - connected systems. Compared to overhead or cable - tray laying methods, direct - burial laying exposes the cables to the soil environment for an extended period. This places higher demands on the cable's structural design, material performance, and overall reliability. To ensure safe, stable, and efficient power transmission throughout the power plant's life cycle, strict control over the burial depth, direction, and protective measures is necessary during the laying process.
Characteristics of Directly - Buried Photovoltaic Cables
The most prominent characteristic of directly - buried photovoltaic cables is that their operating environment is relatively stable yet highly concealed. Underground laying effectively shields the cables from the direct impact of ultraviolet radiation, sand abrasion, and extreme temperature changes compared to cables exposed to the air. This helps slow down the aging rate of the surface material and enhances the overall safety and tidiness of the laying.
From an environmental adaptability perspective, directly - buried photovoltaic cables must endure the combined effects of long - term soil moisture variations, groundwater seepage, and different soil chemical components. In areas with high moisture content or saline - alkali and acidic soils, the cable sheath and metal components are more prone to aging or corrosion. Additionally, changes in ground load, construction vibration, and natural settlement can subject the cables to continuous mechanical extrusion or tensile stress during long - term operation.
Maintenance of Directly - Buried Photovoltaic Cables
Since the cables are underground for a long time, frequent excavation is not only costly but may also cause secondary damage to the original laying structure. Therefore, the focus of operation and maintenance is not on post - repair but on identifying potential hidden dangers in advance through systematic management.
During the power plant's operation, in combination with the geological conditions and drainage status of the project location, continuous attention should be paid to whether there is water accumulation, surface subsidence, or external construction disturbances around the directly - buried lines. In the absence of visual inspection, regularly conducting insulation resistance tests and comparing the changing trends of operating parameters of different circuits can help detect problems such as insulation performance degradation or local abnormalities earlier.
How to Select Directly - Buried Photovoltaic Cables
The PV1500DC - AL series photovoltaic cables of Huacable Technology can precisely meet the requirements of the aforementioned directly - buried cables. When combined with standardized laying techniques and clear line markings, they lay a good foundation for later maintenance. When operation and maintenance management are based on reliable product performance and reasonable engineering design, directly - buried photovoltaic cables can maintain a stable state during long - term operation and provide continuous support for the safe and efficient power generation of photovoltaic power plants.
FAQ
- Q: Why are directly - buried photovoltaic cables difficult to maintain?
- A: Once buried underground, it's hard to visually inspect their operating status. Insulation aging, sheath damage, etc., have concealment and hysteresis.
- Q: What are the main uses of directly - buried photovoltaic cables?
- A: They are mainly used for power transmission between components and combiner boxes, between combiner boxes and inverters, and between inverters and step - up or grid - connected systems.
- Q: What environmental factors can affect directly - buried photovoltaic cables?
- A: Long - term soil moisture changes, groundwater seepage, different soil chemical components, ground load changes, construction vibration, and natural settlement.
- Q: How can we detect potential problems in directly - buried photovoltaic cables?
- A: By regularly conducting insulation resistance tests and comparing the changing trends of operating parameters of different circuits, and also by paying attention to water accumulation, surface subsidence, and external construction disturbances around the lines.
- Q: Why is the PV1500DC - AL series of Huacable Technology recommended?
- A: It can accurately meet the requirements of directly - buried cables and, when combined with proper laying techniques and markings, is beneficial for later maintenance.
Hualan Technology was founded in 2020, is a collection of solar accessories production, sales, research and development and service as one of the high - tech enterprises. At present, the business covers the production and sales of solar photovoltaic cables, photovoltaic cable connectors.
