A photothermal power station with electric heating device and its modeling and optimization operation method

Abstract

The invention puts forward a photothermal power station with electric heating devices and a modeling and operation optimization method of the photothermal power station. A model is applicable to the independent operation photothermal power station, a multi-energy complementary system with wind power, photovoltaic and photothermal power generation functions and other scenes, and multiple operationconstraints are considered and comprise a thermal power balance constraint with hot salt tanks as nodes, a thermoelectric conversion relation constraint of the electric heating devices, a heat tank hourly heat accumulation state constraint, a constraint that stored heat is equal to released heat in a calculation cycle, a thermoelectric conversion constraint of a turbonator, a starting heat constraint and an electric power balance constraint of a steam turbine, a wind curtailment and photoelectric power constraint used for the electric heating devices, and other constraints. The mixed integer linear optimization technology is adopted to solve the optimization problem. By additionally installing an appropriate amount of electric heating devices in the photothermal power station, the electricquantity curtailment of new energy can be effectively reduced, the photothermal electric energy production is increased, and the operation economy of the photothermal power station and the multi-energy complementary system is improved.

Description

technical field [0001] The invention relates to the field of photothermal technology, in particular to a photothermal power station with an electric heating device and a modeling and optimization operation method thereof. Background technique [0002] Solar thermal power generation technology is another major way of utilizing solar energy besides photovoltaic power generation. Most of the areas in my country that can meet the lighting conditions of solar thermal power plants are located in the northwest and north. These areas are rich in wind power and solar energy resources. The large-scale access of wind power and photovoltaics has brought difficulties to the day-ahead and real-time scheduling of the power system. The introduction of the heat storage link of the solar-thermal power station with heat storage makes the output of the solar-thermal power station stable and controllable. Reduce the curtailment rate of new energy. However, for the northwestern region where the...

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Problems solved by technology

However, for the northwestern region where the penetration rate of new energy is too high, limited by the capacity constraints of peaking power stations and energy storage facilities, there is still a problem of high curtailment rate

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