User-side load fast precise dispatching model based on contracts and direct load control

In recent years, the whole society's electricity demand showed a sustained and rapid growth trend. Power supply is difficult to meet the demand. During load peak period in summer, the proportion of air conditioning load is as high as 30% ∼ 50% This kind of load will lead to further widening the peak-valley difference and bring hidden danger to operation of power grid. This paper first introduces the interaction between users, load aggregator and grid dispatch center. Then design contract details between user and load aggregator. Two dispatching models based on contracts and direct load control are put forward in this paper, which incorporates the electric excitation and electricity price response, to ensure safe and stable operation of power grid during peak period. On the basis of grid stable operation, achieving costs optimal. Finally, solving results show that the coordinated dispatching strategy we proposed could not only effectively reduce peak load of the system but fast and precisely dispatch loads when system faults occurs.