Outdoor inverter unit capable of realizing multi-machine parallel connection

Abstract

The invention discloses an outdoor inverter unit capable of realizing multi-machine parallel connection. The inverter unit consists of a direct current cavity, a power cavity and an alternating current cavity. The direct current cavity, the power cavity and the alternating current cavity are successively placed in front, middle and rear areas of an entire cabinet, and the direct current cavity andthe alternating current cavity are connected through left and right side connecting air channels of an alternating current cavity cabinet. The power cavity is completely isolated from the direct current cavity and the alternating current cavity. Because the direct current cavity, the power cavity, and the alternating current cavity are successively placed in the front, middle, and rear areas of the entire cabinet, the inverter unit can be connected to the multiple inversion units in parallel according to power level requirements, output of each inversion unit is connected to a power grid separately, or the output of the multiple inversion units is connected in parallel and then is connected to the power grid uniformly so as to satisfy the needs of different power levels.

Description

technical field [0001] The invention belongs to the technical field of inverters, and in particular relates to an outdoor inverter unit capable of realizing multi-machine parallel connection. Background technique [0002] At present, the market has a large demand for large-capacity outdoor inverters, especially high-power inverter models such as 2.5MW, 3.75MW, and 5MW, which put forward higher requirements for the power level of inverter products. Since the inverter with the largest single power level on the market is 1.25MW, and the structure of the left input and output of the existing inverter cabinet makes it impossible to connect the outputs of multiple inverters in parallel, in order to expand the power level of the inverter to two One inverter can adopt mirror image design, but this method can only realize parallel connection of output of two inverters. In order to achieve the outdoor protection level, the method adopted by each manufacturer is to place two 1.25MW in...

AI Technical Summary

Problems solved by technology

[0004] (1) The demand for outdoor inverters with higher power levels can only be realized through the combination of multiple 2.5MW containers, and the cost is relatively high;

[0005] (2) The processing cost and transportation cost of the whole 2.5MW container are relatively high;

[0007] Therefore, more copper bars are used in the inverter, which is not conducive to the reduction of the overall cost of the inverter.

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