In order to study the effect of molten salt thermal storage schemes on peak shaving capacity and economy of double reheat condensing units

by taking a 660 MW double reheat condensing unit as an example

seven bypass thermal storage schemes are designed by combing thermal storage with bypass system

considering different thermal storage sources. Through simulation

the changes in indicators of different schemes

such as the minimum power generation load rate

thermal storage load reduction number

compensation for increased peak shaving capacity and coal consumption costs

are studied in the heat storage initial range from 30%THA to 50%THA. The results show that

the minimum power generation load rate of the schemes with multiple parallel heat storage sources are lower than that of the schemes using a single heat source. Scheme VII with three parallel heat storage sources can reduce the minimum power generation load rate to below 18% under different initial heat storage conditions. However

in the Scheme I with superheated steam heat storage

the load reduction number of heat storage exceeds 2.00

and the load reduction capacity per unit of heat storage power is the largest. As the load rate of the initial heat storage condition decreases

there is a maximum compensation for the annual increase in peak shaving capacity

and the compensation for multiple thermal storage heat source schemes is greater than that for a single heat source scheme. The annual increase in coal consumption cost of the scheme including low-pressure bypass heat storage is much higher than other schemes

but it will decrease with the initial working condition of heat storage.