For years of deregulation progress in electric utility industry, some of system controls have been transformed from the vertically integrated operation into horizontally service based mechanism. Although regulation, load following, and operating reserve were separated from the integrated system control as individual service options, their operations could still correlate with each other. Therefore, control area would like to know how effectiveness of these services are deployed under the deregulated environment and how the market values could be fairly reflected. This paper describes the modelling of a single area's ACE. The dynamic ACE model could be gainfully applied to evaluate area's service response, allocate area's regulation reserve, and apportion reserve responsibilities to market participants. Various operating cases are studied to verify the feasibility of the proposed methodology in the associated reserve service applications.