With more than 3,1 million photovoltaic systems connected to the electricity grid, a number that continues to grow, Brazil faces an increasingly urgent challenge: ensuring that these installations meet the requirements of the ANEEL (National Electric Energy Agency (ANEEL), especially Normative Resolution No. 1000/2021, which establishes the technical and security requirements for connection to the network.
One of the main challenges is protection against electrical surges, phenomena caused by atmospheric discharges and power supply variations, which can compromise inverters and solar panels and affect the efficiency and safety of systems. This analysis is by Renato Teixeira, Applications Engineering Supervisor at CLAMPER.
This warning becomes even more relevant given the Brazilian climate scenario: according to data from INPE (National Institute for Space Research), the country records, on average, around 78 million lightning strikes per year.
To protect against this risk, he highlighted that the use of DPS (Surge Protection Devices) is essential on both sides of the inverters: AC (Alternating Current) and DC (Direct Current).
CLAMPER, a company specialized in the production of SPDs, offers a portfolio of solutions to maintain the integrity of the photovoltaic structure and the continuity of energy generation.
DPS Effectiveness
O study recent from UPE (University of Pernambuco), in partnership with the manufacturer, entitled Analysis of the performance of solar inverters subjected to electrical surges caused by atmospheric discharges, reinforces the need for external protection with DPS for inverters.
The data proves that the protection provided by an external SPD was able to divert more than 93% of the surge energy, reducing the harmful effects on the inverters – a result that reinforces the importance of following strict technical guidelines in photovoltaic installations.
“A suitable and safe installation invariably involves compliance with Normative Resolution No. 1000/2021 of the ANEEL – which establishes the rules for the distributed generation of electrical energy, including photovoltaic systems,” said Teixeira.
This resolution defines the technical and safety requirements that must be followed in the installations, from the sizing of the equipment to the connection to the electrical grid.
“Compliance with Resolution 1000/2021 is essential to guarantee the safety of the energy distribution system, its users and the facilities that have photovoltaic systems,” he stressed.
“Therefore, the use of DPS, the use of the CLAMPER Solar SB String Box, CLAMPER Front Box and applying the guidelines set out in Resolution 1000 are essential to guarantee the safety, efficiency, longevity and performance of the plants”, concluded the engineer.
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