Cold storage refrigeration automatic control system and method based on distributed photovoltaic power generation

Abstract

The invention provides an automatic control system and method for cold storage refrigeration based on distributed photovoltaic power generation. The system includes a photovoltaic power generation unit, a main control unit, a switch unit, a refrigeration unit, a temperature detection unit and a display unit; the photovoltaic power generation unit collects light to obtain electric energy and transmits to the low-voltage power supply network; when the user automatically controls the on-off of the refrigeration fan, the main control unit controls the PLC to start the automatic control operation through the touch screen of the display unit; the temperature in the cold storage is collected in real time through the temperature detection unit, and the current The temperature value is compared with the set temperature upper limit threshold and temperature lower limit threshold, and by controlling the on-off of the switch unit, the number of refrigerating fans to be turned on in the refrigerating unit is controlled; the invention realizes the intelligent opening and closing of the refrigerating fans in the cold storage, saving Manpower and material resources reduce electricity costs, improve production efficiency, and realize unattended automated cold storage.

Description

technical field [0001] The invention belongs to the technical field of power demand terminals, and in particular relates to an automatic refrigeration control system and method for cold storage based on distributed photovoltaic power generation. Background technique [0002] At present, most cold storages in China are powered by the grid and generally have a low degree of automation, consuming a large amount of electric energy, and therefore cold storages have become one of the largest consumers of electricity. The energy saving of the cold storage is conducive to the reduction of the production cost of the cold storage, the improvement of economic benefits and the promotion of the long-term development of the cold storage. According to statistics from relevant departments, automatic control of cold storage can save energy by about 10% to 15% compared with manual control. Cold storage adopts photovoltaic power generation technology. Compared with grid power supply, cold sto...

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Problems solved by technology

However, the cold storage has high electricity cost and low control efficiency, which did not achieve the goal of saving electricity and reducing consumption, but instead increased production costs

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