Compensation for power transfer systems using variable rotary transformer

A system for transferring power between a first grid and a second grid, the first grid operating at a first electrical frequency and the second grid operating at a second electrical frequency, the system comprising:

• a rotary transformer having a first winding and a second winding, the rotary transformer further having a rotatable shaft and a drive motor for rotationally driving the rotatable shaft;
• a step-down transformer having a primary coil and a secondary coil, the first winding of the rotary transformer being connected to the first grid through the step-down transformer;
• a series compensation circuit connected to one of the primary coil and the secondary coil of the step-down transformer;
• and
• a step-up transformer connected between the rotary transformer and the second grid, and
• a shunt compensation circuit connected between (1) a coil of one of the step-down transformer and the step-up transformer and (2) electrical ground.

A system for transferring power between a first grid and a second grid, the first grid operating at a first electrical frequency and the second grid operating at a second electrical frequency, the system comprising:

• a rotary transformer having a first winding and a second winding, the rotary transformer further having a rotatable shaft and a drive motor for rotationally driving the rotatable shaft;
• a step-down transformer having a primary coil and a secondary coil, the first winding of the rotary transformer being connected to the first grid through the step-down transformer;
• a step-up transformer connected between the rotary transformer and the second grid, and
• a shunt compensation circuit connected to a coil of one of the step-down transformer and the step-up transformer.

A system for transferring power between a first grid and a second grid, the first grid operating at a first electrical frequency and the second grid operating at a second electrical frequency, the system comprising:

• a rotary transformer having a first winding and a second winding, the rotary transformer further having a rotatable shaft and a drive motor for rotationally driving the rotatable shaft;
• a step-down transformer having a primary coil and a secondary coil, the first winding of the rotary transformer being connected to the first grid through the step-down transformer;
• a step-up transformer connected between the rotary transformer and the second grid, and
• a compensation circuit connected to a coil of one of the step-down transformer and the step-up transformer.

A system for transferring power between a first grid and a second grid, the first grid operating at a first electrical frequency and the second grid operating at a second electrical frequency, the system comprising:

• a rotary transformer having a first winding and a second winding, the rotary transformer further having a rotatable shaft and a drive motor for rotationally driving the rotatable shaft;
• one of a step-down transformer and a step-up transformer connected to the rotary transformer;
• and
• a compensation circuit connected to a coil of one of the step-down transformer and the step-up transformer.