Robust Optimal Dispatch Of Power System With Photovoltaic Power Stations And Electric Vehicle Based On Game Theory

The development of power technologies with the characteristics of safety,economic,friend environment and harmony will be the direction and the objective of power industries both at home and abroad.And the integration of renewable energy generation in more areas and at a higher level will be surely one of the most promising ways to achieve the goal,due to their inexhaustible and environment friendly nature.Wind and solar energy are the two potential and relatively mature renewable generations and now make up a significant portion of renewable energy generation.However,renewable energy technologies cannot be modeled or analyzed in the same manner as conventional power plants due to their uncertainty and low-controllability nature,and thus whether the advantages of renewable energy generation can be fully achieved depends a lot on whether the uncertainty and low-controllability can be effectively handled.On the other hand,with the development of the grid and clean energy,the electric vehicles industry has gradually become a new industry.How to control its charging and discharging is a problem to solve.For this reason,an alternative methodology is employed in this thesis by introducing the game theoretic approach to power system modeling and analysis with integration of renewable energy generation for determining their overall effects on the power system,in terms of their long term and short term uncertainties.In this regard,the robust optimal dispatch scheme for the power system incorporating photovoltaic power plant are studied,and the main contributions of this thesis are as follows.Firstly,the paper introduce engineering application of the game theory namely engineering idea and basic modeling ideas of the game theory,Because there is a natural uncertainty factors in the power grid,so the operation economy of power system is bound to be controlled by the artificial(i.e.,power grid scheduling)and the influence of natural condition at the same time,regarding the two as both sides of the game,proposing the two-person zero-sum game model used for the scheduling problem in general.And providing the basis for modeling and analysis of the power system incorporating photovoltaic power plant.Secondly,a robust economic dispatching scheme for the power system incorporating photovoltaic power and plug-in electric vehicles is proposed based on the two-person zero sum game theoretic model with respect to the short term uncertainty of photovoltaic power.The robust dispatching scheme with respect to the worst available photovoltaic power scenario is realized by solving a min-max optimization problem.Finally,through the simulation example,The robustness and low economic risk characteristic of the proposed dispatching strategy is also analyzed by comparing with the dispatching strategy based on a fixed wind power scenario,and the peak clipping and valley filling effects of plug-in electric vehicles are verified.In short,this thesis aims to build an alternative methodology by introducing game theory into power system modeling and analysis with wind and solar power.The work of this thesis can open new perspectives and ideas for dealing with the uncertainties,and can also be regarded as one part of engineering game theory.