Source control terminal and alternating current quantity measuring method

The invention belongs to the field of new energy station equipment control, and particularly relates to a source control terminal and an alternating current quantity measuring method. According to the scheme, according to the relationship between the rated specification and the channel coefficient, the acquisition of the alternating quantity data is realized by reading the change of the alternating quantity rated value to reversely write the analog quantity acquisition channel coefficient, so that the alternating quantity access specification of the source control terminal equipment at the fan side or the photovoltaic inverter side is adapted; therefore, alternating current quantity measurement can be completed under the condition of different access specifications. The program of one model in the source control terminal is suitable for being used by a plurality of different new energy stations, the reusability of the program is greatly improved, the workload of program designers is reduced, the maintenance a