P7.09-billion Mindanao backbone project seen to stabilize power transmission in the island

NGCP photo

IPIL, Philippines — The National Grid Corporation of the Philippines (NGCP) has recently energized the Toril-Bunawan 230kV transmission line, the final component of its Mindanao 230 kiloVolt (kV) backbone project. This will secure the reliability of power transmission services in the entire Mindanao.

As one of NGCP’s critical projects, the Mindanao backbone will connect bulk generation from the northern and southern parts of Mindanao and ensure stable and continuous power from Lanao del Norte, passing through Misamis Oriental and Bukidnon, all the way to Davao del Sur and Davao Occidental.

Among the generating facilities which will connect to the line are the GNPower Kauswagan Clean Coal-Fired Power Plant, Therma South Incorporated Power Plant, and San Miguel Consolidated Power Corporation, with a total combined capacity of 1,440MW.


With an ERC-approved cost of P7.09 Billion, the project involves the construction of the Matanao-Toril 230kV and Toril-Bunawan 230kV transmission lines, the upgrade of the Balo-i-Villanueva-Maramag-Bunawan line from 138kV to 230kV, as well as the upgrade of its substations in Malita, Matanao, Toril, Bunawan, Balo-i, Villanueva, and Maramag.

Energization of the project components started with the power transformer in Villanueva Substation and Maramag-Villanueva 230kV Line 2 in September 2019. The Balo-i-Villanueva Lines 1 and 2 followed in September and October of the same year.

NGCP has also energized the transformers in Bunawan Substation and the Maramag-Bunawan 230kV lines in October 2019. The energization of another new transformer in Villanueva Substation and the Maramag-Villanueva Line 1 in November 2019 also followed, while a power transformer in Toril Substation was energized shortly after in the same month.

The power grid company has energized the Matanao-Toril 230kV Lines 1 and 2 in December 2019 and January 2020, respectively. It also energized the Matanao-Culaman 230kV Lines 1 and 2 in the same period.

The energization of the project’s final component, the Toril-Bunawan 230kV Lines 1 and 2, happened in November 2020 amid varying lockdown protocols implemented across the country.

Service reliability

“With this completion, the line will supplement the existing Davao-Toril-Matanao 138kV transmission line in transmitting any and all available and incoming generation, ensuring transmission service reliability for the entire region,” said NGCP.

Apart from this, the Mindanao 230kV Backbone project is an integral part of NGCP’s Mindanao-Visayas Interconnection Project (MVIP), which will link the Visayas and Mindanao islands and realize sharing of power within the entire country.

“The Mindanao Backbone is critical to the MVIP because through this project, the new transmission line will accommodate the capacities needed to fully support and utilize the capabilities of the interconnection,” the company, in a statement, said.

NGCP is a Filipino-led, privately owned company. It is in charge of operating, maintaining, and developing the country’s power grid. (PR)

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