CONTROL DEVICE OF POWER CONVERTER DEVICE

Provided is an elevator monitoring device capable of properly compensating for the voltage of a system when an unbalanced short circuit occurs. A control device for a power conversion device includes: a current command value generator configured to generate a provisional normal phase d-axis current command value, a provisional normal phase q-axis current command value, a provisional reversed phase d-axis current command value, and a provisional reversed phase q-axis current command value so as to compensate for an alternating current (AC)-side voltage of a power converter; a limiter configured to respectively set limit values of a provisional normal phase d-axis current command value, a provisional normal phase q-axis current command value, a provisional reversed phase d-axis current command value, and a provisional reversed phase q-axis current command value so that the AC-side current value of the power converter does not exceed a preset value; and a controller configured to control the power converter within the limit values on the basis of a determined normal phase d-axis current command value, a determined normal phase q-axis current command value, a determined reversed phase d-axis current command value, and a determined reversed phase q-axis current command value that are obtained from the provisional normal phase d-axis current command value, the provisional normal phase q-axis current command value, the provisional reversed phase d-axis current command value, and the provisional reversed phase q-axis current command value, respectively.