The spot market of electricity makes electricity return to the commodity attribute

which makes the market play an increasingly prominent role in the allocation of power resources. The electricity-trading mode has become an important part of the power market construction and power reform because it is conducive to promoting the consumption of new energy power generation and realizing the optimal allocation of power resources. This paper constructs technical routes for a thermal power unit in Shandong Province. The first is waste heat recovery

refrigeration scheme based on the voltage shrink heat pump and the second is deep peak shaving scheme based on the electric boiler and energy storage tank. The technical transformation scheme is providefor the thermal power unit to participating in the spot power market. The result show that energy supply capacity of the system increased by 48 MW

the cooling capacity increased by 32 MW

and the peak shaving capacity of the unit increased by 9%. In addition

the financial internal rate of return(before tax) of the project is 30.25%

and the payback period(before tax) is 4.1 years

with good profitability.