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Cemig and Huawei Join Forces

In a significant move towards modernization in the energy sector, Cemig has partnered with Huawei to implement a pioneering private wireless network operating at a frequency of 450 MHz. This initiative responds to the growing complexities in distribution services that Cemig has faced while relying heavily on rented public networks to transmit data. The inadequacies of such a model led to various risks, particularly concerning reliability and efficiency.

The Challenges

Cemig's distribution network has encountered notable challenges due to the insufficient coverage provided by Brazilian telecommunications operators—an alarming 50% availability. Numerous distribution devices located in remote and uninhabited areas have long remained in signal blackout zones. In instances of failures, repair teams had to traverse great distances to perform maintenance and routine checks, drastically diminishing operational efficiency. Moreover, the public network's guaranteed service levels were unsuitable for performing critical electrical network operations. During periods of unfavorable weather, it was common for base stations to fail, causing the connectivity rate to plummet from 90% to around 60%. This lapse in communication resulted in critical delays; remote command instructions could not reach distribution devices, compelling personnel to travel to sites and perform repairs manually—a process that severely hampered electricity restoration, jeopardized supply reliability, and led to significant economic losses.

Implementing a Solution

To tackle these challenges, Cemig undertook extensive technical assessments and global case studies, ultimately selecting Huawei as its strategic partner for deploying the first commercial private wireless network in the Latin American energy sector. The collaboration marked a notable milestone not just in technology, but also in the future scalability of Cemig's operations and service offerings.

Achievements and Benefits

Following the extensive field testing of this private network, Cemig began reaping the benefits almost immediately. The reliability of energy distribution services saw a remarkable enhancement, with the connectivity rate for distribution terminals soaring to 99% and communication reliability reaching an impressive 99.99%. This upgrade has significantly improved the overall service quality provided by Cemig.

Key Outcomes:

1. Enhanced Energy Delivery Reliability: The introduction of a private wireless network drastically improved connectivity to distribution terminals, thereby increasing service reliability.
2. Mitigation of Business Risks: With improved data transmission capabilities, the new network reduces line losses, Average System Interruption Duration Index (SAIDI), and Average System Interruptions Frequency Index (SAIFI), helping Cemig avoid regulatory penalties.
3. Guaranteed Investment Returns: By optimizing energy services and adhering to regulatory compliance requirements set by the National Electric Energy Agency (ANEEL), Cemig ensures a favorable return on investments.
4. Development of Basic Production Applications: As the primary communication infrastructure for energy production, this new network provides reliable last-mile connectivity, supporting applications like smart meter integration, expedited deployment of distributed solar energy generation, and comprehensive microgrid management.

This innovative transition from a traditional, load-driven electricity generation model to a dynamic interaction among energy sources, the grid, load, and energy storage solutions is expected to drive substantial advancements in energy management.

In conclusion, the collaboration between Cemig and Huawei not only embarks on a path towards a more resilient energy distribution system but also sets a precedent for future innovations in the region’s energy landscape. For further details, please visit Huawei’s Case Studies.