• Santiago-Tuguegarao line construction starts


    The National Grid Corp. of the Philippines (NGCP) has started the construction of the Santiago-Tuguegarao transmission line, a project that will address the reliability issues of the existing line segments within the area.

    NGCP spokesman lawyer Cynthia Perez-Alabanza said that the project is a response to the continuous increase of supply and load customers within the northeastern region of Luzon.

    “This project will ensure the stability of the transmission backbone once new power plants in the region are connected to the grid,” she added.

    The Santiago-Tuguegarao 230-kilovolt (kV) transmission line project involves adding a second circuit to the existing 230-kV line from Santiago, Isabela to Tuguegarao, Cagayan Valley, spanning approximately 117 kilometers.

    This addition, according to NGCP, will address electric transmission reliability issues in the existing Santiago-Gamu and Gamu-Tuguegarao 230-kV line segments that experience outages.

    “The said line segments become geographically vulnerable to unplanned outages, especially during typhoon season, because it is located along the country’s eastern seaboard, hence the need to reinforce with a second circuit,” the power grid operator said.

    Expected to be completed by 2015, the Santiago-Tuguegarao project will meet the N-1 contingency requirement for the North Luzon transmission corridor that serves the provinces of Cagayan, Kalinga, Apayao, and Isabela. This Philippine Grid Code requirement refers to the ability of the grid to withstand the loss of a major system component with minimal disruption to the grid.


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