DC bus cable for heavy-current photovoltaic power station and installation and laying method of DC bus cable

Abstract

The invention discloses a DC bus cable for a heavy-current photovoltaic power station and an installation and laying method of the DC bus cable. The DC bus cable comprises a trunk cable, branch cables and connection boxes; the trunk is provided with connection segments out of which a first conductor and first steel-band armor layers are exposed; a second conductor and a second steel-band armor layer are exposed out of the end portion of each branch cable, and each second conductor in the end portion of the corresponding branch cable is electrically connected with the first conductor exposed out of the connection segments; positions where the trunk cable is connected with the branch cables are arranged in inner cavities of the connection boxes respectively; and the first steel-band armor layers at the two ends of the connection segment of the trunk cable are electrically and mechanically connected with the second steel-band armor layer in the end portion of the corresponding branch cable via the connection box. According to the invention, the economic benefit is high, the cost is low, the transmission capacity is large, installation and laying are convenient, and the design requirements for the power distributed bus cable of the photovoltaic power station are met.

Description

technical field [0001] The invention relates to a DC bus cable for a large-current photovoltaic power station and an installation and laying method thereof. Background technique [0002] The solar photovoltaic power generation system is mainly composed of four parts: solar panels (components), controllers, inverters, and connecting cables. The voltage provided by a single photovoltaic cell is very small and cannot be directly used as a power source. In practical engineering applications, multiple single cells are always connected in series or in parallel as required, and packaged to form an independent battery module unit. At present, the power of a single-chip photovoltaic module is 80-160Wp (peakwatt, peak power). Multiple photovoltaic modules are connected in series or in parallel, connected to the appropriate DC, and sent to the inverter through the DC bus line (cable) for conversion into AC, and then Boost and grid connection. Photovoltaic DC bus cables are mainly us...

AI Technical Summary

Problems solved by technology

At present, the actual engineering application is ZC-YJV22-1kV AC cable, the specification is 50mm 2 ~95mm 2 Based on the actual demand of photovoltaic power generation projects, several or dozens of ZC-YJV22-1kV AC cables are used in parallel to realize high current transmission. The use cost of such cables is relatively high, so an alternative product is urgently needed to meet the needs of photovoltaic Increasingly fierce cost competition in the power station industry

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