Over-temperature load reduction device and method of optical storage integrated inverter

Abstract

The invention discloses an over-temperature load reduction device and method for an optical storage integrated inverter, and the inverter comprises a photovoltaic boost module, a battery boost-buck module, an inversion module, a photovoltaic boost module temperature collection part and / or a battery boost-buck module temperature collection part, an inversion module temperature collection part, an optical storage integrated inverter temperature collection part, a switch part, an over-temperature load reduction strategy part, a photovoltaic boost module load reduction control part, a battery buck-boost module load reduction control part and an inverter module load reduction control part;the over-temperature load reduction device operates continuously when the photovoltaic-energy storage integrated inverter operates. For the optical storage integrated inverter with multiple inputs and the same module capable of switching between the input and the output in different modes, the invention provides a device and a method for specifically limiting the power of each input after output, so that the overall temperature of the optical storage integrated inverter during working is effectively controlled, the main heat source of the photovoltaic-energy storage integrated inverter is effectively suppressed, and the service life of the machine is prolonged.

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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