Air cooling heat-removal system of photovoltaic inverter cabinet

Abstract

The invention relates to converter equipment in a photovoltaic power generation system, and in particular relates to an air cooling heat-removal system of a photovoltaic inverter cabinet. The air cooling heat-removal system comprises a power unit cabinet body and an electric reactor cabinet body which are connected in parallel and respectively and internally provided with a power unit and an electric reactor, wherein each electric reactor body is arranged at the lower part of the electric reactor cabinet; a general air inlet is formed in the lower part of a front panel of the electric reactor cabinet body; a lateral air vent is formed in the middle part of a partition between the electric reactor cabinet body and the power unit cabinet body and is connected with an air outlet in the top of the power unit cabinet body through a cooling air duct located in the power unit cabinet body; the air outlet is provided with a main air exhaust fan; and an air admission fan which supplies air inwards is arranged at the inner side of the general air inlet. The air cooling heat-removal system of the photovoltaic inverter cabinet, provided by the invention, can be applied to high altitude areas without increasing the capacity of equipment parts, so that main components of the inverter cabinet applied to high and low altitude areas can be exchanged, thereby reducing the manufacturing cost and the maintaining cost.

Description

technical field [0001] The invention relates to a converter device in a photovoltaic power generation system, in particular to an air-cooled heat dissipation system for a photovoltaic inverter cabinet used in a photovoltaic inverter cabinet. Background technique [0002] A photovoltaic inverter cabinet in a photovoltaic power generation system usually includes a power unit cabinet and a reactor cabinet connected side by side, which are used to install the power unit and the reactor respectively. In high-power photovoltaic inverters, the LCL circuit is the main filter circuit in the photovoltaic inverter. The heating value of the reactor is directly related to the current passing through the reactor and the harmonic content in the current. In the inverter When working, the greater the passing current, the greater the heat generation of the reactance, the more harmonic content, the greater the heat generation of the reactance. Especially in high-altitude conditions, the photo...

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Problems solved by technology

In this way, there are great differences and cost waste in the design of components and cabinets, which brings more difficulties to the design of inverters, especially the heat dissipation design of reactors.

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