Photovoltaic optimizer composite communication system based on Lora and PLC and working method thereof

Abstract

The invention discloses a photovoltaic optimizer composite communication system based on Lora and PLC and a working method thereof, and belongs to the photovoltaic power generation technology field. Adetection unit of a power optimizer can collect electric parameter data of a photovoltaic module in real time, carries out communication between an upper computer and the photovoltaic optimizer through a Lora communication module, and carries out the communication between the photovoltaic optimizers through a PLC communication module. Through the Lora communication module and the PLC communication module, the upper computer can grasp an actual operation condition of each photovoltaic module in a photovoltaic system in real time, determines position information of the photovoltaic module through an unique identification ID of the photovoltaic optimizer, issues a control instruction according to the actual operation condition, adjusts a working mode of the photovoltaic optimizer, and ensures normal operation of the photovoltaic module. By using the composite communication system, the two are combined, a communication network does not need to be additionally built, cost is effectively reduced, and reliability and stability of communication are improved.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic optimizer communication, and specifically relates to a photovoltaic optimizer composite communication system based on Lora and PLC and a working method thereof. Background technique [0002] The photovoltaic optimizer can realize the maximum power point tracking (MPPT) for each photovoltaic module to ensure that each photovoltaic module in the photovoltaic system can output electric energy to the maximum. It also has energy transmission, energy optimization, data acquisition and communication functions. It is suitable for use in mountainous areas and areas with severe roof shading. [0003] The current communication method of photovoltaic optimizer is relatively simple, and generally adopts wired communication method RS485 communication, bus communication, power line carrier PLC communication or wireless communication method Lora technology. The method of RS485 communication and bus communic...

AI Technical Summary

Problems solved by technology

[0003] The communication method of the current photovoltaic optimizer is relatively simple, generally using wired communication method RS485 communication, bus communication, power line carrier PLC communication or wireless communication method Lora technology

The method of RS485 communication and bus communication is simple, but it needs to lay a communication network to increase the construction cost. Power line carrier PLC communication saves communication lines and can communicate with wires. However, in DC system lines, the capacitance to ground is large, and the filtering effect is large. Attenuates quickly with distance, and increasing the transmission power will affect the power generation efficiency

Wireless communication Lora technology is small in size, strong in performance, strong in environmental adaptability, and suitable for outdoor work, but it cannot solve the positioning problem of the photovoltaic optimizer in the system, and cannot determine which two adjacent photovoltaic optimizers are connected, and through wireless communication The delay is high, which cannot meet the communication problems of adjacent optimizers and the system can quickly issue command information to all photovoltaic optimizers in the system

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