#Huawei #Brazil #São Paulo #CEMIG #wireless network

Introduction

Cemig, a prominent power utility in Brazil, has partnered with Huawei to launch an innovative 450 MHz private wireless network. This initiative is crucial in addressing the complex needs of energy distribution networks, particularly in Brazil where the existing public network infrastructure has limitations.

Context of the Collaboration

Historically, Cemig relied heavily on rented public networks for data backhaul in its distribution operations. However, this model posed significant risks, especially in remote areas where network coverage is often inadequate. The complexity of modern energy services necessitates a more reliable and efficient communication framework to enhance operational efficiency and reliability.

Challenges Faced

Network Coverage Gaps

In Brazil, network coverage from providers hovers around a mere 50%, leaving many distribution devices in isolated, uninhabited areas vulnerable to communication blackouts. Maintenance and inspections required staff to traverse long distances, severely compromising operational efficiency.

Unreliable Services

Public networks’ service level agreements (SLAs) are not designed to support the stringent demands of electricity networks. For instance, during the rainy season, extreme weather often leads to the failure of base stations and microwave links, plummeting connectivity from about 90% to nearly 60%. In cases of communication breakdowns, operators couldn’t execute remote commands, necessitating manual interventions and significantly delaying restoration times, ultimately affecting service reliability and incurring financial losses.

Strategic Solution

To combat these challenges, Cemig initiated multiple rounds of technical evaluations and global research into potential applications. Ultimately, Huawei was chosen as the strategic partner for the joint deployment of the first commercial 450 MHz private wireless network for the energy sector in Latin America.

Outcomes and Impact

Following extensive field testing, Cemig recognized the advantages of the private wireless network, which bolstered their confidence in modernizing the distribution network and raised expectations for future energy transitions. According to Cemig's representatives, "During the bidding process, Huawei submitted the most compelling proposal, addressing not only our current modernization requirements but also being scalable for future renewable energy integration. With Huawei's extensive experience in the energy sector, this partnership transcends technology; it's pivotal for our future growth."

Key Benefits of the Private Wireless Network

1. Enhanced Reliability: The implementation of the private wireless network has resulted in a dramatic increase in the connectivity of distribution terminals to 99% and communication reliability soaring to 99.99%. This advancement has tremendously improved Cemig's service delivery in power distribution.

2. Reduced Operational Risks: The private network aids in improving line losses, System Average Interruption Duration Index (SAIDI), and System Average Interruption Frequency Index (SAIFI), allowing Cemig to evade regulatory fines, fostering operational compliance.

3. Guaranteed Return on Investment: By significantly boosting power supply reliability, the network puts Cemig in a favorable position regarding compliance with ANEEL regulations, ensuring a robust return on investment.

4. Support for Essential Core Applications: Serving as the fundamental communication backbone for energy production operations, the private network delivers reliable connectivity essential for contemporary distribution automation. Additionally, it prepares Cemig for future core applications, such as large-scale integration of smart meters, prompt adoption of decentralized solar energy, and complex microgrid management—promoting a shift from traditional, load-dependent power generation to dynamic interactions across sources, grids, loads, and storage.

Conclusion

The collaborative deployment of the 450 MHz private wireless network represents a significant advancement for Cemig and highlights Huawei's commitment to transforming the energy sector in Brazil. This partnership not only ensures better service delivery but also paves the way for innovative energy solutions in the future.

For more information, visit Huawei's Case Studies.