Motor Design And Simulation Of Charging And Discharging Control Of Flywheel Energy Storagye System

Energy as the backbone of modern industry has a very important position in the development of society. Demand for energy has the following characteristics: diversity, high reliability and volatility which demand a higher energy storage technology. Wind power and solar photovoltaic power have the characteristics of random, intermittent and volatility which makes them very difficult to Grid-Connected, Solving this problem also requires efficient energy storage devices. Meanwhile developing of large scale electricity storage technology is a very important part of the construction of smart grid. Flywheel energy storage is a relatively new form of mechanical energy storage technologies, compared with traditional chemical forms of energy storage, it has the advantages of long life, high efficiency, power, pollution-free and a very good market prospects and competitiveness.Flywheel energy storage system a mechatronic device, including the mechanical, electrical and other disciplines.The main technologies related to the system include: flywheel rotor technology, magnetic bearings technology, electric/generator technology, the system's charge and discharge control technology and so on.This task of this project is to design and analysis the flywheel energy storage system with the capacity of 2kW/100Wh.According to the design capacity of 2kW/100Wh goals, design the structure of the flywheel rotor, and use the finite element software to analyze the strength. Refer to some motor design information, use the RMxprt module in Ansoft to design the motor used in the system and import the module of the motor to Maxwell to calculate the distribution of the electromagnetic field which verify that the motor program can meet the system requirements.Finally, Analysis of the system's charge and discharge process and design of the system's charge and discharge plan. The charging circuit adopted traditional speed and current double closed-loop control strategy, in the inner current loop, used the current hysteresis band control method, In order to stabilize the output voltage and control the depth of discharge The circuit in the discharge process adopted new closed-loop Boost topology. Setting up the charging and discharging model of the system in Matlab/simulink and realizing the process simulation of charging and discharging, the simulation results show the plan feasibility.