New 225-kV Transmission Lines and Substations Provide Reliable Power Supply to Impoverished Regions of Cameroon

Spanning several regions of Cameroon where 55% of the population live in poverty, grid connectivity is limited and the power supply is unreliable. However, a new project, which will extend the country’s electricity network, may help. The project involves building two 225-kV single-circuit transmission lines and supporting substations. Upon completion, the new infrastructure will enhance grid connectivity and improve regional access to a sustainable power supply. It will promote industrialization, economic growth, and better quality of life, while reducing environmental impact.

Kalpataru Projects International Limited (KPIL) is delivering the project from design through construction and commissioning. The company was responsible for arranging 297 kilometers of linear transmission line and extending two strategic substations required to connect the new lines. Spread across swampy areas and dense forests prone to inclement weather, the project presented difficult terrain and climate (Figure 1). “Tropical climate, inclement weather, and floods make for only four months of dry working conditions,” said Raghu Ram, senior vice president and project head at KPIL.

1. KPIL used Bentley technology to reduce project completion by approximately 9% and save 6% in overhead and subcontracting costs. Courtesy: KPIL

A Legacy Project Management Approach

Faced with site constraints and only a short window of mild weather, KPIL realized that its manual workflows would not suffice. The group had multiple data sources, including Microsoft Excel spreadsheets and manual data, creating challenges that needed to be addressed, Ashok Kumar, vice president and head of innovation and strategy at KPIL, explained. Confronted with data management, design, and technical challenges, KPIL sought to improve its existing project management approach and digitize project delivery with user-friendly applications to easily achieve buy-in from those resistant to change.

KPIL tried using a general Excel-based planning approach for on-the-ground planning and execution. However, this approach lacked integration and the comprehensiveness to accommodate the dynamic nature and complexities of the large-scale project. Managers needed to streamline workflows among the geographically dispersed team, facilitate accurate data capture and coordinated design, and implement progress and schedule monitoring, as well as foster engagement among the team and stakeholders. To overcome these challenges, KPIL needed an integrated technology solution to establish a connected data environment and digital twins.

Leveraging Bentley Applications to Digitalize Delivery

KPIL selected Power Line Systems (PLS) and STAAD for transmission line layout, substation design, and structural analysis, as well as nPulse as the collaborative project management platform. Using Bentley’s applications, KPIL created a digital twin of the transmission lines and substation buildings, relying on them for engineering and project management. Working in a connected digital environment facilitated data integration, and accurate and streamlined modeling workflows, which were critical to overcoming the engineering and collaboration challenges amid the difficult terrain and the globally dispersed team.

“Bentley [technology] helped model the transmission lines through the rough terrain and install the tallest—86 meters high—tower in Cameroon [across] the river to minimize impact on forest and aquatic life,” said Kumar.

As part of its digital initiatives, KPIL developed 16 immersive virtual reality trainings in 20 different languages, fostering personnel and stakeholder buy-in to its technology-driven approach. KPIL integrated artificial intelligence (AI) and Internet of Things (IoT) technology to establish an analytics platform and single source of truth, providing digital visibility and automated insight. The platform helped identify and resolve potential onsite issues and mitigate risks. The digital twin solution enabled real-time holistic project monitoring, as well as performance and quality management, throughout design, engineering, procurement, and commissioning for full lifecycle digital delivery. “[Our] digital initiatives covered the entire project value chain, including engineering, design, and centralized project management,” said Kumar.

Digital Twins Drive Intelligent Workflows and Sustainability

“Bentley applications helped us improve efficiency, reduce project delays, and [enable] risk mitigation,” said Kumar. Establishing digital twins in a connected data environment promoted intelligent workflows and decision-making, resulting in cost-effective route optimization that has reduced costs and minimized impact on the environment and residential areas. Compared to previous manual methods, the Bentley-based technology solution reduced project completion by approximately 9% and saved 6% in overhead and subcontracting costs. Through digital progress and resource monitoring, KPIL saved resource hours and reduced onsite personnel by about 6% and costs associated with rework by 2.5%, while improving quality of deliverables.

“[Our] digital technology initiatives have not only contributed to operational improvement and financial savings, but also resulted in ESG [environmental, social, and governance] improvements,” said Kumar. Using the digital twins to monitor materials and fuel consumption, KPIL reduced in-situ casting of the concrete tower foundation and diesel fuel consumption, minimizing the project’s carbon footprint. This 225-kV transmission line project eliminated usage of diesel power generation in the region, reducing carbon emissions equivalent to 450 megatons per month. KPIL’s digital initiatives facilitated timely completion of a critical national project, delivering sustainable power supply to indigent regions of Cameroon.

Brian Rock ([email protected]) is the industry marketing director for energy at Bentley Systems. He has overseen the integration of key energy-related acquisitions for Bentley, including Power Line Systems, SPIDA, and EasyPower.

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