Over-temperature and load-reducing device and method for an integrated optical-storage inverter

Abstract

An over-temperature load reduction device and method for an integrated optical-storage inverter, the integrated optical-storage inverter includes a photovoltaic boost module, a battery buck-boost module and an inverter module, a temperature acquisition unit of the photovoltaic boost module and / or a battery Buck-boost module temperature acquisition unit, inverter module temperature acquisition unit, optical-storage integrated inverter temperature acquisition unit, switch unit, over-temperature load reduction strategy unit, photovoltaic boost module load reduction control unit, battery buck-boost module drop-off control unit The load control part and the load reduction control part of the inverter module. When the solar-storage integrated inverter is running, the over-temperature load reduction device also continues to operate. For an optical-storage integrated inverter with multiple inputs and the same module switches between input and output in different modes, a device and method for how to specifically limit the input power of each channel after limiting the output is provided, which effectively controls the optical The overall temperature of the integrated storage inverter when it is working can effectively suppress the main heat source of the integrated optical storage inverter and prolong the life of the machine.

Description

technical field [0001] The invention relates to the field of integrated optical storage inverters, in particular to an over-temperature load reduction device and method for integrated optical storage inverters. Background technique [0002] An inverter is a converter that converts DC power into constant frequency and constant voltage or frequency modulation and voltage modulation AC power. During the working process, heat will be generated due to loss. If the internal temperature is too high, the service life of the equipment will be reduced. Therefore, when the temperature is overheated, the inverter needs to be derated to reduce the loss, thereby reducing the temperature to ensure the inverter. life. [0003] A photovoltaic inverter is an inverter that converts the variable DC voltage generated by photovoltaic solar panels into mains frequency alternating current, which can be fed back to the commercial transmission system or used for off-grid grids. There is only one in...

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Problems solved by technology

[0005] In summary, the input and output of the solar-storage integrated inverter may be 1-2 channels, and the same module will switch between the input side and the output side in different modes. If the photovoltaic inverter is directly used to control the output by limiting the The method of inverter temperature, when limiting the output, cannot limit the power of any one of the two specific inputs. Although the output is limited, it is possible that the power of the original lower power will become smaller, while the original higher power The power of the main heat source remains the same, or even the power becomes larger, generating more heat, which cannot effectively reduce the temperature of the equipment and cause machine damage

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