Research On Optimal Allocation Of Capacity For Pre-installed Multivariable Energy Storage Power Station

There are several border posts in western China that are not yet connected to the main grid.These border posts are mostly located in remote areas with inconvenient traffic and rough terrain.If a grid connected to the main grid is established,the investment cost will be huge and the benefits will not be maximized.State and State Grid Corporation proposed to build a microgrid to solve this problem,comprehensively considering the later maintenance of equipment and the convenience of transportation,there is an urgent need for a new type of miniaturized,modular and pre-assembled microgrid energy storage power station that can adapt to special environments.Program.According to the actual demand of the power grid,different application scenarios will require different types of energy storage units,so how to choose the energy storage unit that matches the demand according to the actual needs of the microgrid,configure the capacity of different energy storage units,and how to carry out the container box The optimization of the layout of internal energy storage units is an important and meaningful research topic.The main work of this article mainly includes the following:Aiming at the selection of energy storage units,the characteristics of various energy storage units are analyzed,and the schemes involved in the selection of energy storage units are explored from environmental,technical and economic indicators.A hierarchical analysis method combining qualitative and quantitative,systematic and hierarchical is proposed.A hierarchical structure model,pairwise judgment matrix,matrix consistency check and fuzzy comprehensive evaluation model are constructed.Aiming at the problem of coordinated and optimized configuration of energy storage units in pre-installed energy storage power stations,by analyzing the microgrid balance power spectrum,based on the response characteristics of different types of energy storage units,a multi-element energy storage unit power allocation strategy is determined;in order to avoid guaranteeing certain cutting-edge loads The energy storage capacity is infinitely configured with electricity,and the compensation power is adjusted.Through the analysis of the cost structure of the energy storage system,with the minimum annual comprehensive cost as the target,considering the constraints of container power density,remaining power,energy overflow rate and load shortage rate,the idea of solving the model by genetic algorithm was determined.Aiming at the problem of optimizing the internal layout of the pre-installed energy storage power station,that is,taking into account the best ventilation and heat dissipation effect inside the container and the maximum energy storage capacity,a layout optimization scheme for the pre-installed energy storage power station based on Surrogate is proposed.Taking the radius of the air inlet and outlet and the width of the air duct as the decision variables,the Latin hypercube sampling method was used to generate samples.A Surrogate optimization algorithm based on Kirging modeling method is designed,and an error detection model is constructed.Finally,based on the above model,taking a wind-solar complementary microgrid as an example,a series of problems involving type selection,capacity configuration,layout optimization,etc.in the installed energy storage power station are solved.The results show that: hydrogen-containing energy storage,lithium battery Compared with the energy storage unit selection scheme of super capacitors,the economic level,technical level and environmental level are the best solutions;compared with the conventional lithium battery and super capacitor hybrid energy storage units,the multi-energy storage solution containing hydrogen energy storage is functional.It has obvious economic advantages;the air inlet in front and the air outlet in front are the optimal heat dissipation schemes for pre-installed energy storage power plants.When the air inlet radius is 584 mm,the air outlet radius is 300 mm,and the heat dissipation channel is 242 mm,you can take into account at this time The pre-installed energy storage power station has the best ventilation and heat dissipation effect and the largest energy storage capacity.The example analysis verifies the scientificity and applicability of the method proposed in this paper,which provides a reference for the design of pre-installed energy storage power station and a reference for equipment manufacturers.