Apparatus for controlling zero-sequence current

摘要

the invention in an embodiment in accordance with the image control apparatus minute current multilevel inverter of each phase (phase ) direct current voltage and the direct current phase of each target using the average value of the voltage to be output to the grid current value first image generating section for generating a current reference value minute current reference value; Current reference value converter for converting a first image on the current reference value minute stop coordinates of the first image minutes the current reference value; Converting the second image to the third image min minute current reference value on the current reference value in synchronization coordinates, and the actual output image minutes each on a grid in the current measurement value and the minute current virtual image is changed, the current phase of the synchronous coordinate measurements synchronous coordinate converter for converting a current value on the feedback; And the synchronization by adjusting the image coordinates and the third reference value and a feedback current value on a minute electric current comprises a current control section for controlling the image minutes of transient current image minutes, According to the present invention in the transient state to reduce the overshoot and oscillation has the effect of improving the reliability of the system. ;