Header box monitoring system based on optical fiber ring network

Abstract

The invention relates to a header box monitoring system based on an optical fiber ring network. The system comprises a plurality of header box monitors mounted in each header box and a box transformer substation communication management machine mounted in a box transformer substation. Each header box monitor comprises a first optical fiber module and a second optical fiber module. The box transformer substation communication management machine comprises a first optical fiber module and second optical fiber module. The first optical fiber modules and the second optical fiber modules connect the header box monitors and the box transformer substation communication management machine end to end through optical fibers so as to allow each header box monitor to have two communication loops connected with the box transformer substation communication management machine. The header box monitoring system has the advantages that communication is performed through the optical fibers, the communication problem between the header box monitors of a photovoltaic production area and the box transformer substation communication management machine can be solved, the electromagnetic interference of other power equipment can be avoided effectively, electronic devices can be prevented from being damaged by lightning strike, and a looped network can be used as communication network redundancy to increase reliability.

Description

technical field [0001] The invention relates to the field of photovoltaic monitoring, in particular to a combiner box monitoring system based on an optical fiber ring network. Background technique [0002] With the large-scale construction of domestic photovoltaic power plants, the proportion of photovoltaic power generation in the entire power supply is gradually increasing, and the safety monitoring of photovoltaic power plants has gradually gained the attention of operating companies. At present, the monitoring of photovoltaic production areas mainly depends on the monitoring of combiner boxes and the monitoring and control of box transformers. The photovoltaic production area is composed of many photovoltaic modules and has a wide area. Therefore, reliable communication between smart devices is a problem that needs to be solved in the monitoring of photovoltaic power plant production areas. [0003] The communication between the current mainstream box-change measurement...

AI Technical Summary

Problems solved by technology

One of the main equipment of the photovoltaic power station is the inverter. The inverter will generate a large number of high-order harmonics during operation, which will cause great electromagnetic pollution to the grid and space, and seriously affect RS485 and wireless communication. It is an accurate and reliable Surveillance poses communication risks

In addition, the production area of ​​photovoltaic power plants often does not have a unified ground network due to its large scope during construction, and lightning protection measures are not perfect, which also brings great hidden dangers to communication, often causing the entire network to lose connection on thunder days

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