Multi-objective scheduling method for wind power-electric vehicle-thermal power joint operation model

Abstract

The invention provides a multi-objective scheduling method for a wind power-electric automobile-thermal power combined operation model, relating to the field of electrical power systems. The method comprises the steps: S1, a plurality of groups of 24-time-interval wind speed values are generated randomly through the Weibull distribution function; S2, 24-time-interval wind power output and an average value of daily output of the wind power are calculated; S3, an electric automobile is charged and discharged, the charging power and discharging power of the electric automobile are obtained, and the generated output of a thermal power generating unit is calculated; S4, the maximum value and the minimum value of two functions are calculated respectively; S5, fuzzy processing is carried out on the two functions so as to obtain the maximum desirability function; and S6, population evolution is carried out on the maximum desirability function so as to obtain the optimal output. Aiming at the random and indeterminate output of the wind power, the invention provides the method of using ordered charging and discharging of electric automobiles, namely an energy storage system, to stabilize the fluctuation of the wind power, and abandoned wind power is reduced. And meanwhile, the fluctuation of the wind power is reduced, so peak-load regulation and spinning reserve pressure of the thermal power generating unit is reduced, and economic benefits of a wind power-electric automobile-thermal power combined operation system are maximized.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a multi-objective dispatching method for a wind power-electric vehicle-thermal power joint operation model. Background technique [0002] In recent years, with global warming, energy problems have continued to worsen. With the rapid development of the global economy, the demand for fossil fuels in countries around the world is increasing. Wind energy for renewable energy. However, due to the uncertain fluctuation of wind energy in the time domain and the serious influence of the region, wind power grid connection will bring unnecessary spinning reserve and peak shaving pressure to the power grid. The literature "Research on Wind Power Output Characteristics" pointed out that from the curve shape of the maximum output and the general output day, it can be seen that the daily output of wind power has obvious peak-valley characteristics, and the wind power output is larger at night fro...

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Problems solved by technology

The literature "Characteristics of Electric Vehicle Charging and Discharging and Its Impact on Power Distribution System" proposes V2G dispatching of electric vehicles and separately analyzes the impact of electric vehicles on feeder load, network loss and voltage offset after they are put into the system, but does not consider wind power and Complementary coordination of electric vehicles, that is, the role of electric vehicles in stabilizing wind power fluctuations and reducing wind curtailment, as well as optimal dispatch considering multiple objectives at the same time; the document "Stochastic Economic Dispatch Considering Uncertainty of Electric Vehicles and Wind Power Output" constructed The uncertain stochastic economic dispatch model of electric vehicles and wind turbines is used to alleviate the impact of the anti-peaking characteristics of wind turbines, but this model does not take into account the impact of the wind power-electric vehicle joint model on traditional thermal power units; the literature "Considering Multi-objective Active Power Optimal Scheduling for Intermittent Energy Access and Operation Safety" puts forward the impact of the joint operation of electric vehicles and thermal power, wind power and thermal power on coal cost and energy saving and emission reduction, but does not consider wind power- The effect of joint optimal dispatching of electric vehicles and thermal power

At present, there are still relatively few researches on the multi-objective optimization of the joint dispatch of wind power, electric vehicles and thermal power.

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