Decision-making method for optimizing thermal power unit combination under complementation of wind power and energy storage system

Abstract

The invention relates to a decision-making method for optimizing thermal power unit combination under complementation of wind power and an energy storage system. The decision-making method comprises a process of optimizing an upper layer problem and a lower layer problem, wherein the upper layer problem builds upper layer problem constraint conditions by taking minimization of the operating cost of a thermal power unit within a set period as an objective function; the lower layer problem builds lower layer problem constraint conditions by taking maximization of profit acquired by the energy storage system in performing space-time translation and backup supply on electric energy in a power grid as an objective function; and a solution is acquired by using a mode of alternative iteration of the upper layer problem and the lower layer problem. The energy storage system in the model not only can participate in an expected power balance constraint, but also can play a role of backup through complementation with the wind power, and has an ability of directly eliminating the uncertainty; frequent startup and shutdown of the thermal power unit is avoided on the basis of improving the uncertainty acceptance ability; and a regulating effect of the frequency of an electric power system is considered in decision making, so that the decision is enabled to be free from conservation and more conform to the reality.

Description

technical field [0001] The invention relates to the technical field of power system operation and control, in particular to a combination optimization decision-making method for thermal power units under the complementarity of wind power and energy storage systems. Background technique [0002] Unit combination is a key and core issue in power system operation and control. Its essence is to formulate a unit start-stop plan that meets the power generation, load and backup needs of the day or week. [0003] In recent years, due to the dual pressure of energy demand and environmental protection, wind power and other renewable energy power generation has developed rapidly. While exerting the benefits of energy saving and emission reduction, due to its inherent strong uncertainty, the safe and economical operation of the power system faces challenges. To meet this challenge, various complementary facilities, such as energy storage, are constantly emerging. The purpose is to prom...

AI Technical Summary

Problems solved by technology

If it is locked as expected within the research period, and if the expected deviation occurs, it will be completely borne by the thermal power unit, which will cause the unit to deal with the unexpected uncertainties of load and renewable energy at the same time, causing the unit to provide more standby, or load shedding and abandonment of wind power generation

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