Research On Economic Dispatching Of Microgrid With Electric Vehicle And Cogeneration System

With the consumption of primary energy,using new energy technology to replace primary energy has become the main direction of current research.The development of power electronics technology provides a technical guarantee for the stable operation of microgrid.The development of microgrid provides a more economical and efficient way to absorb new energy in situ.With the intellectualization of power grid,the interaction among "source,network,load and storage" can optimize the operation of microgrid to the greatest extent.Due to the limitations of local absorption of new energy,energy interconnection can effectively save the cost of energy conversion between different forms of energy.Combined Cooling Heating and Power(CCHP)microminiaturization provides more forms of energy consumption for microgrid.However,the addition of CCHP system will make the structure of microgrid more complex and bring difficulties to the economic dispatch of microgrid.With the pollution of fossil energy to the environment,electric vehicles as a new non-polluting means of transportation have been strongly supported by the government.However,the large-scale access of electric vehicles(EV)to the micro-grid will cause load fluctuation in the micro-grid and bring difficulties to economic dispatch.In order to solve the above problems,it is of theoretical value and practical significance to study the micro-network from the perspective of interaction between source,network,load and storage.Firstly,this paper analyses and compares the development status of CCHP system,electric vehicle dispatching mode and micro-grid economic dispatching optimization algorithm.Innovation on the basis of existing technology.On the basis of previous studies,it is proposed that CCHP secondary cycle system should be added to economic dispatch.The simulation results show that CCHP considering secondary cycle system can reasonably distribute energy and reduce economic costs.At the same time,this paper also simulates the scheduling schemes of EV and CCHP controllable secondary circulation system through experimental data,and proves that the optimal scheduling scheme is simultaneous scheduling of EV and CCHP controllable secondary circulation system.On the basis above,a mathematical model is proposed,which takes multi-economic income as the objective function,and the algorithm is improved according to the mathematical model.The proposed algorithm is compared with other algorithms and applied to the simulation of an example.The simulation results show that the proposed algorithm has the fastest convergence speed and the highest accuracy.Finally,the simulation results show that the scheduling scheme proposed in this paper can not only ensure the overall microgrid economy,but also make more economic subjec save costs.On the basis above,further optimization of microgrid main body is considered from the point of view of minimizing distribution network loss.Taking the minimization of intra-day network loss as the goal and the parameters of IEEE33 nodes as the data,tabu search method and Benders decomposition method are used to optimize the spatial microgrid interconnection scheme,which can maximize the profit of microgrid main body while satisfying the minimum daily loss rate of distribution network.