Low-fault photovoltaic grid-connection device

Abstract

The invention discloses a low-fault photovoltaic grid-connection device. The device comprises a box body, two cushion blocks are welded on the box body, the two cushion blocks are uniformly distributed in the box body, a converter is fixedly mounted on the cushion blocks, a plurality of connecting mechanisms are arranged on the converter, a plurality of threading grooves are formed in the side wall of the box body, the plurality of threading grooves are uniformly distributed in the side wall of the box body, a plurality of cables are slidably connected in the threading grooves, the cables are arranged in the connecting mechanisms, an arrangement mechanism is arranged in the box body, supporting legs are welded to the box body, wheels are arranged at the tail ends of the supporting legs, and bases are connected to the outer sides of the supporting legs through threads. The low-fault photovoltaic grid-connection device has the advantages of neat cable arrangement, low fault rate, stable cable connection, static conductive treatment and heat dissipation functions.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic power generation, in particular to a low-failure photovoltaic grid-connected device. Background technique [0002] In recent years, distributed photovoltaic power generation has been widely used in industrial plants, public buildings and residential roofs due to its advantages of small capacity, low voltage level, close to the load, and little impact on the power grid. As an important application method of solar power generation, distributed photovoltaic power generation can make full use of the characteristics of the widespread existence of solar energy and avoid the site constraints of centralized construction. Especially in the face of the reality of densely populated middle and eastern my country, its large-scale application prospects are extremely broad. The current solar power generation uses silicon photovoltaic cells to generate direct current, which is converted into three-phase alte...

AI Technical Summary

Problems solved by technology

The current solar power generation uses silicon photovoltaic cells to generate direct current, which is converted into three-phase alternating current through the inverter and incorporated into the grid. The inverter has been equipped with an anti-islanding device, but the inverter is realized automatically In order to ensure the life safety of maintenance personnel, the electricity bureau stipulates that “obvious disconnection points must be provided” for disconnection and grid connection with the power grid, that is, there are manual devices such as knife switches and breaking switches, and the existing undervoltage protection The converter is only for single-phase or three-phase current, with small application range and low precision

With the intensification of environmental pollution, people are paying more and more attention to the development of new energy. Photovoltaic power generation has been used more and more because of its advantages such as renewable clean energy. Especially in recent years, distributed photovoltaic power generation is rapidly developing. However, when the existing civil photovoltaic power generation grid-connected devices are in use, the cross-connected cables are prone to short circuits, resulting in a high failure rate of the devices. At the same time, the cables are shaken by the wind, and the pulling force generated during the process It is easy to cause the cable to fall off between the grid-connected device

Moreover, the existing equipment lacks static conduction treatment and good heat dissipation function

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