Methods to provide electric power from renewable energy equipment to an electrical load

A method for providing electric power from a renewable energy equipment (108) to an electrical load (122), the method comprises:

• (a) providing an HVDC system (100) comprising an AC/DC converter sub-system (102) and a VSC sub-system (104),
• wherein the AC/DC converter sub-system comprises at least one AC/DC converter unit (106), an input electrically connected with the renewable energy equipment (108), and an output electrically connected with the VSC sub-system (104), and
• wherein the VSC sub-system comprises at least one VSC (118), an input electrically connected with the AC/DC converter sub-system (102), and an output electrically connected with at least one electrical load (122);
• (b) determining an initial voltage magnitude and phase angle for electric power to be generated by the renewable energy equipment (108);
• (c) operating the renewable energy equipment (108) to generate electric power having the predetermined initial voltage magnitude and phase angle from step (b) to energize an HVDC link (116) between the AC/DC converter sub-system (102) and the VSC sub-system (104), thereby providing DC electric power to the VSC sub-system (104), wherein the renewable energy equipment (108) generates the electric power at a power production rate;
• (d) operating the VSC sub-system (104) to convert the DC electric power to AC electric power output to energize the at least one electrical load (122), wherein the AC electric power output comprises an initial voltage magnitude;
• (e) determining whether the power production rate of the renewable energy equipment is within a designated parameter, and if an outcome of the determination is a “no,” operating the renewable energy equipment to follow the VSC sub-system such that controlling the AC electric power output of the VSC sub-system (104) influences the power production rate of the renewal energy equipment (108);
• (f) changing the AC electric power output of the VSC sub-system (104), thereby introducing a power disparity to the renewable energy equipment (108);
• (g) in response to at least the power disparity from step (f), adjusting the power production rate of the renewable energy equipment (108) to restore power balance to the renewable energy equipment (108);
• and
• (h) repeating steps (e) through (g) until it is determined that the power production rate of the renewable energy equipment (108) is within the designated parameter.