Kenya Electricity Transmission Company has started a major power infrastructure project aimed at strengthening the national grid and improving electricity reliability in the Nairobi region. The initiative, called the Kimuka 400kV Substation Phase II, is part of the larger Kenya Green and Resilient Expansion of Energy Program supported by the World Bank.
The project is designed to address key challenges in Kenya’s transmission network. At present, nearly 70 percent of the country’s renewable energy is routed through the Suswa substation. However, the existing 220kV transmission line connecting Suswa to Nairobi is often overloaded. This has created serious supply risks, including voltage instability and occasional nationwide blackouts. With growing electricity demand and increasing renewable energy generation, the need for network expansion has become more urgent.
To solve this issue, KETRACO plans to construct a new 400/220kV substation at Kimuka, located around 30 kilometers from Nairobi. This new facility will allow the Suswa-Isinya transmission line to operate fully at 400kV capacity. As a result, power flow will be better managed, congestion in the network will be reduced, and overall grid stability will improve significantly.
The project includes the development of a greenfield substation equipped with two 200 MVA transformers, along with other associated infrastructure. In addition, “Line In Line Out” works will be carried out to connect the existing Suswa-Isinya 400kV double circuit transmission line to the new Kimuka substation. These upgrades are expected to enhance the efficiency of power evacuation from renewable energy sources and ensure a more stable supply to consumers.
To ensure smooth execution, KETRACO has invited experienced consulting firms to submit expressions of interest for project management and construction supervision services. The selected consultant will act as the Owner’s Engineer and will be responsible for overseeing design reviews, factory testing of equipment, and on-site supervision. The consultant will also monitor the project during a 12-month defects liability period after completion.
In addition to technical responsibilities, the consultant will ensure compliance with environmental and social standards. The role also includes providing training to 15 KETRACO engineers through both formal sessions and on-the-job experience, helping to build local capacity in managing high-voltage infrastructure projects.
Firms applying for the consultancy must have at least 15 years of experience in high-voltage substation projects. The deadline for submitting expressions of interest is March 27, 2026, and the consultancy contract is expected to run for about 18 months.
This project is an important step in supporting Kenya’s transition to clean energy. By strengthening transmission infrastructure, it will help improve reliability, reduce power costs, and support the country’s long-term goal of achieving a fully sustainable energy system.
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