Framework for estimation of daily variation of dynamic response of aggregate load

In order to illustrate daily variation of dynamic characteristics of the load for different types of load, time-varying aggregate load responses are derived in this paper. Hourly participation of different load categories and dynamic responses of individual load categories are necessary information for the derivation of time-varying aggregate load responses. The load participations of individual load types in aggregate load are derived from surveys or directly measured daily load curves of different load types. Dynamic responses of individual load categories are captured from the simulation or field measurements and emulated with suitable mathematical formula. The aggregate dynamic responses are derived by scaling the individual load dynamic responses with respective load contributions and summing up, resulting in hourly real and reactive power demand dynamic response curves. All hourly curves are finally presented in daily demand response surfaces which simultaneously provide the information of dynamic responses and hourly demand.