Feasibility of Decomposing ACE to Identify the Impact of Selected Loads on CPS1 and CPS2

Control areas are held to the NERC´s control performance standards, CPS1 and CPS2. A control area serving rapid and widely varying loads would like to know how load variations in certain subareas or zones affect its area´s CPS1 and CPS2 measures. This paper addresses the question of decomposability of the 1-minute average value of ACE, ACE1, the primary variable in the computation of CPS1 and CPS2, into components attributable to load fluctuations within defined zones. It includes descriptions of dynamic models of ACE and ACE1, and simulated results confirming the decomposability of ACE1.