Study Of Optimized Control On Electric Load-shedding For Chillers

With the development of the era and the rising living standards of people's, the demand of electricity is growing day by day, and the using rate of air-conditioning system is rising, too. The rapid growth of air conditioning load has been an important reason for power load and power shortage, therefore, the optimization of the chiller unloading control is urgent. Present research is aimed more at centrifugal chillers, and do the linear optimization load-shedding control, but the on-off type is the majority in the engineering applications.The traditional control methods do not apply to them.This paper set up an optimized load-shedding control based on the demand response control (DRC) program. The main conclusions and achievements are as follows:(1) First of all,This study discussed the demand response control(DRC) in detail,which is feasiblable.(2) This study presents an Binary Integer Programming(BIP) model with cooling load maximum to optimize the on-off (segmental) Chillers system in order to avoid from the peak loading and the ulter fees.(3) This paper do the unloading control by Lingo optimization software and C++, and then compares the results to other two methods. The result shows that the performance of chillers unloaded is better than the latters.(4) This paper has discussed the load-shedding control with the comfort standard of building customer in order to meet not only the load-shedding demand but also the maximum cooling capacity of the chiller and the building customer comfort standard.(5) This paper uses the simplex method and branch bound method to do the unloading control.The result shows that it is applied to the I-7188XA core chiller control system to improve energy efficiency and inhibit the peak load.This study provides a future research direction to improve the load-shedding control.This load-shedding program has significant influences on the application of the DRC program for Power Company in China.