Patent ID: 8693220

Claim:
A rotary power generation system, comprising: a rotary power generator for generating variable-frequency alternating currents; a negative sequence current regulator that determines and uses frequency dependent negative sequence gains based on an electrical frequency of the rotary power generator, wherein the negative sequence current regulator is further configured to: obtain the electrical frequency of the rotary power generator; determine the frequency dependent negative sequence gains from the set of frequency dependent negative sequence gains based on the obtained electrical frequency of the rotary power generator; and generate negative sequence voltage signals based on the determined frequency dependent negative sequence gains; and a system for controlling voltage components for balancing the variable frequency alternating currents generated by the rotary power generator based on the frequency dependent negative sequence gains, wherein the system for controlling voltage components is further configured to balance the variable-frequency alternating currents of the rotary power generator based on the negative sequence voltage signals generated by the negative sequence current regulator.