An AGC Frequency Control Reserve Capacity Evaluation Method for Air Conditioner Groups Based on Nonintrusive Load Disaggregation
Massive air-conditioner resources on the consumer side have a huge potential to be involved in system frequency control,and massive scattered individual air-conditioners can be aggregated into air-conditioner groups to participate in system automatic generation control(AGC).As the operating status of individual air-conditioners is random,it is necessary to accurately evaluate the frequency control reserve capacity of air-conditioner groups.In this paper,a data-driven nonintrusive load disaggregation(NILD)method is proposed to incorporate massive air-conditioner groups into AGC frequency control reserve.First,the proposed method constructs a sequence-to-sequence model to nonintrusively forecast the frequency control reserve capacity of individual air-conditioners.Considering the fact that the participation of air-conditioners in AGC may affect the comfort of users,the feasibility of individual air-conditioners is evaluated to participate in AGC frequency control and a selection mechanism is constructed to determine whether they can be included in the frequency control reserve of air-conditioner groups.In the proposed method,individual air-conditioners within a sub-station that participate in AGC are aggregated to derive the air-conditioner group frequency control reserve of the sub-station,and the air-conditioner group frequency control reserve of all sub-stations are aggregated to derive the entire air-conditioner group frequency control reserve.The experiments simulate different degrees of system frequency drops in which air-conditioner groups work cooperatively with thermal units for AGC frequency control.The simulation results demonstrate the validity of the proposed method.
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