Research On Operation Optimization Strategy Of Hydro-storage Energy Station

With the rapid development of economy,the energy consumption of air conditioning system in all kinds of buildings is increasing.The water storage air conditioning system is used by more and more buildings because of its "peak shifting and valley filling" characteristics.However,the operation effect of the water storage air conditioning system is often poor in the actual operation.Therefore,this paper carries out the field test and Simulation Research on the operation optimization of the air conditioning system of the water storage energy station.Firstly,the system of a water storage energy station in Jiangsu Province is measured.The test contents mainly include building energy supply,main engine performance,unit startup and shutdown,system energy consumption and so on.The measured data show that the average EER of the energy station in winter and summer is 3.47 and 4.0 respectively.The overall energy efficiency is not high,but it is still higher than that of the traditional system.In the process of actual measurement,it is found that there are still some problems in the system,such as insufficient or excess energy storage,and the unit is in low efficiency operation for a long time.Secondly,the TRNSYS energy consumption simulation platform is established.Compared with the measured energy consumption data,the error of energy consumption in winter and summer is 0.8% and 1.23% respectively,which verifies the accuracy of the simulation platform.The establishment of the platform provides a strong support for the formulation of staff optimization operation strategy.Finally,aiming at the problems of poor operation effect in the operation process of water storage energy station system,the operation optimization concept with minimum operation cost as the goal is proposed,which is divided into primary optimization and final optimization.The primary optimization is the integrated control strategy,which allocates the energy stored in the reservoir and supplied by the main engine,and uses a simple algorithm to solve the optimal allocation ratio.The ultimate optimization is to optimize the operation strategy by adjusting the flow of source side and primary circulating water pump and setting the optimal water supply temperature on the basis of primary optimization.The results show that compared with the existing strategy,the energy consumption and operation cost of the optimization strategy are reduced by 18.8% and 25.9% in summer and29.5% and 30.2% in winter,respectively.The simulation results show that the optimal operation strategy solves the problem of poor operation effect of water storage energy station system.