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Cemig and Huawei Initiate a Groundbreaking 450MHz Private Wireless Network

In November 2026, two tech giants, Cemig and Huawei, took a significant step in enhancing Brazil's energy infrastructure by jointly implementing a private wireless network operating at 450 MHz. This innovative solution aims to address the growing complexities faced by distribution networks and improve operational efficiency in power delivery throughout the country.

The Challenge

Cemig has long relied on public networks for data backhauls, but this model posed various risks, particularly in the face of increasing service demands. A staggering fact reported indicated that network coverage from public carriers in Brazil hovered around merely 50%. Consequently, numerous distribution devices located in remote and uninhabited regions frequently experienced prolonged communication blackouts. Such interruptions required personnel to traverse extensive distances for repairs and routine checks, ultimately hampering operational efficiency.

Notably, without a reliable Service Level Agreement (SLA) tailored for the electric grid, the public network often faltered during adverse weather, particularly in rainy seasons. Instances arose where the connectivity rate slipped from an impressive 90% down to approximately 60%. During communication outages, commands for remote control could not reach the devices, compelling staff to respond manually on-site. This manual intervention not only drastically delayed power restoration but also disrupted supply reliability, culminating in significant economic losses.

The Solution

To tackle these challenges, Cemig undertook extensive technical assessments and global research analyses. After considering various options, Cemig selected Huawei as a strategic partner to deploy the region's first commercial private wireless network for the energy sector using the 450 MHz frequency band.

Following operational tests, Cemig realized the myriad advantages of their new wireless network, bolstering their trust in modernizing their distribution framework. The CEO of Cemig articulated, “Huawei presented the most compelling proposal during our selection process, offering a solution that not only meets our immediate requirements for revamping our distribution network but also scales seamlessly for the integration of renewable energy sources in the future.”

Advantages of the New Network

1. Enhanced Power Reliability: The private wireless network successfully raised the connectivity of distribution terminals to an impressive 99% while ensuring a communication reliability at an astonishing 99.99%. This dramatic enhancement significantly improved the level of service for power distribution at Cemig.

2. Mitigated Business Risks: The network aids in reducing line losses, SAIDI (System Average Interruption Duration Index), and SAIFI (System Average Interruption Frequency Index), therefore helping the company avoid regulatory penalties.

3. Guaranteed Return on Investment: By significantly elevating the quality of energy services, the private network ensures compliance with ANEEL’s regulatory requirements while providing an attractive return on investment.

4. Expanded Core Production Applications: Serving as a vital communication backbone for energy production, the wireless network delivers dependable connectivity at the network's end, facilitating current distribution automation. It also lays the groundwork for future key applications such as large-scale smart meter integration, accelerated deployment of distributed photovoltaics, and comprehensive microgrid management. This strategic shift represents a transition from conventional energy generation to a dynamic interaction model involving generation, the grid, loads, and storage capabilities.

Conclusion

The partnership between Cemig and Huawei signifies more than just technological advancements; it is pivotal for the business’s growth trajectory. For further insights into this revolutionary project, you can explore additional resources at Huawei's website.

As we move forward into an era where efficient energy management becomes essential, initiatives like this set a precedent for the energy sector's future, proving the potential of private networks in optimizing performance and reliability.