Data acquisition checking method and monitoring control system in direct current transmission system

The invention relates to a data acquisition checking method and a monitoring control system in a direct current transmission system, and belongs to the technical field of direct current transmission.The method comprises the following steps that a plurality of measuring points are arranged on the same electric quantity in the direct current transmission system, a main measuring point and standby measuring points are involved, the standby measuring point are served as redundant standby of the main measuring point, meanwhile, absolute values of difference values between measured data of the mainmeasuring point and measured data of the standby measuring points are calculated, when the absolute values of the difference values are larger than a set threshold value, and absolute values of difference values are not larger than the set threshold value, the measured data of the main measuring point are judged to be abnormal, and then the standby measuring point with a absolute value of a difference value larger than th