The high proportion of new energy penetration has affected the economy and benefits of wind power and photovoltaic power generation in China

resulting in the decline of power grid flexibility

insufficient peaking capacity

difficulty in local consumption

and the abandonment of wind and light. In view of the predicament of the current power system

it is necessary to vigorously develop heat storage technology

study thermal storage technology of molten salt based on local consumption of wind power and photoelectric power

improve the capacity of peak and frequency regulation of power system

and effectively exert the advantages of shifting peaks and valleys. Based on the use data of schools and hospital boilers in Jiangsu Province

the potential of electric energy substitution is analyzed. And life cycle cost model（LCC）is established to conduct economic comparative analysis of various types of boilers

including initial investment cost

operating cost

maintenance cost

so as to provide a strong basis for equipment selection and investment optimization.