Product Characteristics And Applications Of Photovoltaic Cables
The cable is an important piece of equipment to connect the power supply, distribution system, and customer end, which directly determines the safety, reliability, and economy of the power system.
The role of cables in photovoltaic power generation systems is mainly to ensure the electrical insulation between photovoltaic modules during operation, ground resistance to ground, avoid electrical short circuits and electromagnetic interference, etc., and also to provide a reliable electrical connection for photovoltaic power generation modules and equipment such as DC convergence boxes.
And when PV modules and inverters and other equipment are connected, the cable, as the carrier of power transmission, needs a reliable and stable electrical connection with the inverter.
Therefore, cable materials with high corrosion resistance, high insulation, high mechanical strength, and good chemical resistance are usually chosen in power plant construction to ensure long-term safe and stable operation of the equipment.
Due to the high requirements for cables in PV systems, aluminum alloy wires are usually used as conductors (copper or aluminum core wires are also used). Depending on cable specifications and applications, aluminum/copper/aluminum stranded cables can be divided into aluminum alloy conductor cables (AWGCA), non-aluminum conductor cables (UCC), aluminum/copper stranded cables, and tinned copper core cables.
The connection between PV modules and inverters is usually made by metal armor, and the methods can be divided into welding method, threaded method, and stranded method.
1. Product features
1) Excellent flame retardant performance.
2) Meet the requirements of UL, CB, UL94 V (VW-1), and other flame retardant standards.
3) Insulation and sheathing materials are imported ABS engineering plastics, high-temperature resistance (100℃), low-temperature resistance (-40℃), and good corrosion resistance, and the insulation core is made of high-quality aluminum/copper alloy, which has excellent mechanical and electrical properties.
4) Flexible laying method.
2. Scope of application
The connection between photovoltaic modules and inverters.
Electrical connection between the PV power plant and power grid (AC sink box, etc.).
When the inverter, PV module, and battery or grid are isolated, there are different requirements for the cable.
3) Installation method: laying, buried or hanging.
3. Application environment
Photovoltaic cables generally require high mechanical strength and chemical resistance, so the photovoltaic system needs to have sufficient mechanical strength to ensure that the cable will not be damaged by external forces during operation, and also take into account the bending performance of the cable to ensure that it can be used properly.
At present, the international photovoltaic industry mainly uses copper/aluminum hybrid conductors or aluminum-copper hybrid conductors, two kinds of conductors are used in different industries for use.
Compared with copper or aluminum core cables, AWGCA is mainly used in photovoltaic systems for the transmission of direct current due to its higher mechanical strength, better electrical properties, corrosion resistance, and longer service life.
In addition, depending on the choice of cable materials, generally also according to the wire and cable manufacturers provide a copper/aluminum core wire and different types of copper-clad aluminum cable.
4. Application occasions and construction requirements
Photovoltaic cables in the actual application mainly include the following aspects.
In the construction of photovoltaic systems, construction, usually choose different specifications and grades of cable for laying and wiring.
Photovoltaic cable laying, according to the characteristics of the cable use environment for reasonable selection.
Usually, when the cable is laid, a single bracket or multiple brackets should be used to ensure a reliable electrical connection between each layer of PV modules and inverters.
5. Product market analysis
As the cost of photovoltaic power generation decreases, the development of photovoltaic power generation in China has shown good momentum, and the cumulative installed capacity of domestic photovoltaic is expected to exceed 40 GW in 2020 and is expected to exceed 200 GW by 2025.
At the same time, the global PV market is also showing a high growth trend.
According to IHS Markit data, the global new production capacity in 2019 is about 20 GW. It is expected that by 2025, the global new installed PV capacity will reach about 75 MW (equivalent to 1.83 GW), of which Asia accounts for 50%.