The utility model discloses an alternating current filter supply cutting system relates to the power quality control technology field, the calculation engineering that alternating current filter switching mode exists in the HVDC system is big in order to solve, switching form data occupy the various methods of operation of the big and unable nimble corresponding direct current transmission system of storage space problem. This alternating current filter supply cutting system includes: a distorsion factor index judgement device for judging whether initial distorsion factor index and target distorsion factor index meet the standard, an alternating current filter selecting arrangement for selecting simulate and put into the alternating current filter in the HVDC system, an alternating current filter switching indicating device for being based on the judged result of distorsion factor index judgement device and alternating current filter selecting arrangement's selection result instruct alternating current filter's actual switching to operate. The utility model provides an alternating current filter supply cutting system is arranged in the switching alternating current filter of system to HVDC.