But, Hydro’s 20 year capital plan, submitted to the public utilities board in 2008, notes that “[d]epending on which scenario unfolds, some, or all of the Holyrood generating plant will be required for decades into the future.”
According to Hydro, the Holyrood generating station is an “absolute necessity in the system.”
It is important to consider that whichever expansion scenario occurs, an isolated Island electrical system or interconnected to the Lower Churchill via HVDC link, Holyrood will be an integral and vital component of the electrical system for decades to come. In the isolated case Holyrood will continue to be a generating station; in the interconnected scenario its three generating units will operate as synchronous condensers, providing system stability, inertia and voltage control.
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