Patent ID: 8848400

Claim:
A system for performing reactive power control, the system comprising: a power converter coupled between a power source and an electrical grid, the power converter configured to convert a first form of electric power generated from the power source to a second form of electric power suitable to be distributed by the electrical grid; and a controller coupled to the power converter, the controller configured to: monitor the electric power transmitted between the power converter and the electrical grid, decouple a positive sequence component and a negative sequence component from the monitored electric power, perform a positive reactive power control with respect to the positive sequence component by: generating a first d-axis positive current command according to a monitored DC voltage across a DC link of the power converter and a specified DC voltage command; generating a first q-axis positive current command according to a calculated feedback positive reactive power and a specified positive reactive power; regulating the first d-axis positive current command and the first q-axis positive current command to generate a d-axis positive voltage command and a q-axis positive voltage command; and transforming the d-axis positive voltage command and the q-axis positive voltage command to generate voltage command signals, perform a negative reactive power control with respect to the negative sequence component, and transmit a control signal to the power converter based on the positive reactive power control and the negative reactive power control to enable the power converter to adjust a reactive power of the electric power transmitted between the power converter and the electrical grid.