In brief
On November 9, 2026, Sri Lanka started construction of a 26‑km, 220‑kV double‑circuit transmission line to connect the 100‑MW *Mannar* wind farm to the national grid. The domestically financed project, valued at roughly 2.5 billion Sri Lankan rupees, aims to improve grid stability and facilitate integration of additional renewable energy sources.
Sri Lanka on Sunday began construction of a domestically funded 26‑km, 220‑kV double‑circuit transmission line to connect its 100‑megawatt wind power project on the southern island of Mannar to the national grid, the Department of Government Information announced in a statement sourced by Xinhua.
The project, estimated to cost about 2.5 billion Sri Lankan rupees—roughly 7.5 million U.S. dollars—will link the Mannar 220/33‑kV grid substation with the proposed Mullikulam 220‑kV metering substation. 220‑kV, a high‑voltage level used for bulk power transmission, allows efficient delivery of electricity over long distances while reducing line losses.
A double‑circuit line carries two parallel circuits on the same right‑of‑way, providing higher transmission capacity and redundancy. The new line’s 26‑kilometer span will bring the wind farm’s output directly into the national system, enabling the 100‑MW *Mannar* project to feed power into the long‑range grid shared by Sri Lanka’s commercial and residential users.
Project Objectives and Expected Impact
Officials said the transfer line is intended to transmit electricity generated by the wind farm to the national grid and help improve the stability of the country’s power system. By adding a dedicated high‑voltage route, the grid can better balance supply and demand fluctuations that arise when wind generation varies with weather patterns.
In addition, authorities noted the line will support the integration of more renewable energy into the national electricity system. The new transmission corridor is expected to reduce bottlenecks at the grid’s current interconnection points, thereby facilitating future projects such as additional wind farms or solar arrays.
The domestically funded nature of the project underscores Sri Lanka’s commitment to expanding renewable capacity without relying on foreign investment for the grid infrastructure. By covering the entire cost—approximately $7.5 million—the government demonstrates its willingness to invest in the physical backbone required to realize the benefits of sustainable energy generation.
Although the wind farm itself is still under development, the timely construction of the 220‑kV line positions Sri Lanka to graduate from pilot testing towards operational deployment as soon as the turbines begin producing power. The transmission line will remain in active use even after the wind farm’s commissioning, ensuring a reliable conduit for electricity to reach households, businesses, and industrial facilities across the island.
Explicit statements from the Department of Government Information highlighted that the line will tie the Mannar project into the national grid, thereby extending the reach of renewable generation and enhancing overall supply resilience. By providing a dedicated path for the extracted power, the new infrastructure is expected to mitigate the risk of overloading existing transmission assets.
While the official source did not provide a detailed technical specification of the line’s components—such as conductor type or tower design—standard practice for 220‑kV transmission lines includes insulated switchgear, protection relays, and monitoring systems to manage voltage stability and fault response. These elements collectively ensure that variable wind output can be safely and efficiently transferred across the network.
Twenty‑eight years have passed since Sri Lanka first introduced large‑scale wind projects, and the *Mannar* farm marks the country’s third major wind installation. The 100‑MW capacity places it among the largest single installations in South Asia, indicating that the nation is accelerating the pursuit of renewable energy targets set by its national climate commitments.
Future updates on the project’s progress—including commissioning dates, performance metrics, and integration strategies—are anticipated from Sri Lanka’s energy ministry and the national utility. The ongoing development further reflects the country’s strategy to create a resilient energy mix that balances intermittent renewables with the stability demands of a growing economy.
With the start of the grid link, Sri Lanka takes a concrete step toward a more reliable, renewable‑heavy electrical infrastructure, a move likely to be mirrored by other developing nations seeking to modernize their power systems while adhering to domestic financing frameworks.
