Parametric wave energy, subsea power generation

A method for regulating the generation of electricity from wave energy in a wave energy convertor, the method comprising:

• forming a modified Airy wave theory model by:
• generating a graph of a propagation of the waves on a surface of a homogeneous fluid layer in accordance with the Airy wave theory;
• resetting a beginning of the wave phase from a wave crest to a wave trough;
• and reorienting a direction of the propagation of the wave phase;
• estimating an amount of energy transferred from a wave to a wave energy mechanical interface, through a power take off, and to a plurality of generators, wherein the amount of energy transferred from the wave to the wave energy mechanical interface is estimated based on the modified Airy wave theory model;
• wherein the power take off comprises a plurality of hydraulic pumps coupled with a plurality of hydraulic motors, and wherein the hydraulic pumps are coupled with the wave energy mechanical interface, and wherein the generators are coupled with the hydraulic motors;
• and
• regulating impedance of energy transferred to the generators, thereby controlling the generation of electricity by the generators;
• wherein the regulating comprises starting-up at least one of the hydraulic pumps while at least another of the hydraulic pumps is shut-down, shutting-down at least one of the hydraulic pumps while at least another of the hydraulic pumps is started-up, shifting a gear of one or more of the hydraulic motors, clutching-in at least one of the hydraulic motors while at least another of the hydraulic motors is clutched-out, clutching-out at least one of the hydraulic motors while at least another of the hydraulic motors is clutched-in, or combinations thereof.

A method for regulating the generation of electricity from wave energy in a wave energy convertor, the method comprising:

• positioning a wave energy mechanical interface of a wave energy convertor in water, the wave energy convertor further comprising:
• a power take off, the power take off including a plurality of hydraulic pumps coupled with a plurality of hydraulic motors, wherein the hydraulic pumps are coupled with the wave energy mechanical interface;
• and
• a plurality of generators coupled with the hydraulic motors;
• forming a modified Airy wave theory model by generating a graph of a propagation of the waves in accordance with the Airy wave theory, resetting a beginning of a wave phase of the graph from a wave crest to a wave trough;
• and reorienting a direction of a propagation of the wave phase;
• estimating an amount of energy transferred from waves to the wave energy mechanical interface by determining a wave energy estimate based on the modified Airy wave theory model;
• and
• controlling the generation of electricity by the generators based on the wave energy estimate-based.

A method for regulating the generation of electricity from wave energy in a wave energy convertor, the method comprising:

• forming a modified Airy wave theory model by generating a graph of a propagation of a waves on a surface of a homogeneous fluid layer in accordance with the Airy wave theory, wherein a wave phase of the graph begins at a wave crest, and wherein a direction of propagation of the wave phase of the graph is such that a wave period moves from 360° to 0°;
• resetting the beginning of the wave phase from the wave crest to a wave trough;
• and reorienting the direction of the propagation of the wave phase such that the wave period moves from 0° to 360°;
• estimating an amount of energy transferred to a generator from a wave energy convertor, wherein the estimating comprises determining a wave energy estimate based on the modified Airy wave theory model;
• and
• regulating impedance of energy transferred to the generator based on the wave energy estimate, thereby controlling generation of electricity by the generator.

A method for regulating the generation of electricity from wave energy in a wave energy convertor, the method comprising:

• providing a wave energy converter comprising a wave energy mechanical interface, a power take off, and a plurality of generators, wherein the power take off comprises a plurality of hydraulic pumps coupled with the wave energy mechanical interface and a plurality of hydraulic motors coupled with the hydraulic pumps, wherein the hydraulic motors are coupled with the generators;
• forming a modified Airy wave theory model by generating a graph of a propagation of a waves on a surface of a homogeneous fluid layer in accordance with the Airy wave theory, wherein a wave phase of the graph begins at a wave crest, and wherein a direction of propagation of the wave phase of the graph is such that a wave period moves from 360° to 0°;
• resetting the beginning of the wave phase from the wave crest to a wave trough;
• and reorienting the direction of the propagation of the wave phase such that the wave period moves from 0° to 360°;
• estimating an amount of energy transferred to the generators from the wave energy convertor, wherein the estimating comprises determining a wave energy estimate based on the modified Airy wave theory model;
• regulating impedance of energy transferred to the generators based on the wave energy estimate, thereby controlling the generation of electricity by the generators;
• and
• using offline generators of the plurality of generators as synchronous condensers.

A system for the generation of electricity, the system comprising:

• a wave energy converter comprising a wave energy mechanical interface, a power take off, and a plurality of generators, wherein the power take off comprises a plurality of hydraulic pumps coupled with the wave energy mechanical interface and a plurality of hydraulic motors coupled with the hydraulic pumps, wherein the hydraulic motors are coupled with the generators;
• a controller configured to estimate an amount of energy transferred to the generators from the wave energy convertor, wherein the estimating comprises determining a wave energy estimate based on a modified Airy wave theory model, the modified Airy wave theory model formed by:
• generating a graph of a propagation of a waves on a surface of a homogeneous fluid layer in accordance with the Airy wave theory, wherein a wave phase of the graph begins at a wave crest, and wherein a direction of propagation of the wave phase of the graph is such that a wave period moves from 360° to 0°;
• resetting the beginning of the wave phase from the wave crest to a wave trough;
• and reorienting the direction of the propagation of the wave phase such that the wave period moves from 0° to 360°;
• the controller configured to regulate impedance of energy transferred to the generators based on the wave energy estimate, thereby controlling the generation of electricity by the generators;
• and
• wherein offline generators of the plurality of generators are configured to function as synchronous condensers.

A method for regulating the generation of electricity from wave energy in a wave energy convertor in real-time, the method comprising:

• providing a wave energy converter at a site, wherein asynchronous waves are present at the site, wherein the wave energy converter comprises:
• a wave energy mechanical interface;
• a power take off coupled with the wave energy mechanical interface, the power take off comprising a plurality of hydraulic pumps coupled with a plurality of hydraulic motors, wherein the hydraulic pumps are coupled with the wave energy mechanical interface;
• and one or more generators coupled with the plurality of hydraulic motors;
• determining, in real-time, wave conditions of the asynchronous waves at the site using a modified Airy wave theory model including determining a wave energy estimate of the asynchronous waves, wherein the modified Airy wave theory model is generated by:
• generating a graph of a propagation of waves on a surface of a homogeneous fluid layer in accordance with the Airy wave theory, resetting a beginning of a wave phase of the graph from a wave crest to a wave trough, and reorienting a direction of the propagation of the wave phase;
• estimating, in real-time, an amount of energy transferred from the asynchronous waves to the wave energy mechanical interface, through the power take off, and to the one or more generators based on the wave energy estimate based of the modified Airy wave theory model;
• and
• regulating, in real-time, impedance of energy transferred to the one or more generators based on the estimated amount of energy transferred from the asynchronous waves, thereby controlling generation of electricity by the one or more generators.