Control And Power Distribution Of Power Generation And Energy Storage Devices Strategy Research

With the continuous development of society,environmental pollution,resource shortage and other issues are becoming more and more serious.It is urgent to find a new type of renewable energy.Wind energy and solar energy have large storage capacity and wide distribution range,and have achieved high power output,so they are widely concerned by researchers.However,solar energy and wind energy have great instability.In order to improve wind and light utilization,it is also very important to study the utilization and storage of wind energy and solar energy.The emergence of new energy and energy storage technologies has brought about new control problems.First of all,the auxiliary of the energy storage system can fundamentally suppress the power oscillation of the system,and can further improve the tracking ability of the traditional generator to load.When working with the energy storage system,the state of charge(SOC)of the energy storage system needs to be considered.The control strategy of the generator is adjusted accordingly.In addition,in terms of power supply system,different energy storage systems have their own characteristics.Energy storage methods such as compressed air and water storage have the characteristics of strong endurance and slow response,while the response speed of batteries and super capacitors is relatively fast.However,the capacity is limited.It is necessary to consider how to combine different energy storage methods to realize their respective advantages and achieve high-capacity fast power supply.Third,when new energy,energy storage and traditional power supply simultaneously supply power to the entire power grid,in order to make full use of clean energy and reduce energy waste,it is necessary to rationally allocate user load requirements,and design corresponding control strategies to coordinate the power output of each part,and together provide the power required by the user.This paper first considers the control problem of single-machine infinity system assisted by energy storage system.According to the amount of energy storage,the tracking speed of generator tracking user demand can be adjusted to avoid energy waste.Two modes of switching control and command filtering are given.Secondly,a compressed air-supercapacitor hybrid energy storage control system is designed to take advantage of the longer endurance of the expansion power generation system and the faster response speed of the super capacitor unit,and establish an adaptive controller to eliminate the sudden change of grid demand.The change in pressure on the side of the tank ensures the tracking performance of the system.Finally,a coordinated control strategy is proposed to reasonably distribute the power required by the load to the new energy generation,steam turbine power generation and energy storage systems.Taking photovoltaic power generation as an example,the switching rules of optical-storage mode and optical-steam-storage mode are designed to ensure the coordinated power supply and stable operation of each device in the system.The effectiveness of the strategy is verified by simulation.