The matters of attention in the construction cable photovoltaic power generation system is analysed?

Photovoltaic engineering of cable project construction cost is compared commonly big, laying mode selection directly influence the construction cost, so the reasonable plan, the correct selection of cable, the cable is an important part of the design work. Cable cable apply the

in photovoltaic power generation project, the construction of the cable cost is compared commonly big, the choice of the ways of laying will directly affect the construction costs. Therefore, reasonable planning and correct selection of cable laying methods is an important part of the cable design. Cable laying methods should be based on engineering conditions, environmental conditions, cable specification, type, quantity, factors such as comprehensive consideration, and according to the requirements of reliable operation, convenient maintenance and technical, economic and reasonable principle to choose. Photovoltaic power generation project of dc cable laying mainly includes the buried sand brick laying, wear pipe laying, trough cable tray, cable conduit installation, tunnel installation, etc. Communication cable laying and ordinary power system installation. DC cable is mainly used for photovoltaic modules between, between group and DC female box, between mother box and inverter, with a small cross-sectional area and large quantity. Usually, the cable along the module bracket bound or buried directly through a pipe. When laying the DC cable, usually need to consider: ( 1) Using component stents as channels of cable laying and fixing parts, the connection between the cable and the component list and connecting cable between the parent box can reduce the influence of environmental factors to some extent. ( 2) To receive strength evenly in cable laying should be appropriate and should not be too tight. In general, photovoltaic place day and night temperature difference is bigger, should avoid cable fracture caused by thermal expansion and cold contraction. ( 3) For buildings on the surface of the pv cable wire, consideration should be given to the structure of the overall aesthetics. Installation position should be avoided in the walls and the sharp edge of the bracket for laying cable, so as to avoid short circuit caused by the cutting and wear on the insulating layer, or because of the shear force caused by open cut wire. Cable should also be considered at the same time, the problem such as direct lightning on the road. ( 4) Reasonable planning cable run, minimize cross and merge, laying reduce earthwork excavated volume and amount of cable project construction process. Photovoltaic power generation system of DC cable connection cable outside, most connection mode is mainly to insert the connector, can be protected through a pipe. Component bracket used for channels of cable laying and fixing device, in order to reduce the influence of environmental factors. Other cable connection looks almost the same as general electric power system.