Modeling And Control Of Mechanical Elastic Energy Storage Based On Permanent Magnet

In power system, the production, transmission and consumption of the electricity is almost simultaneously, in view of electricity cannot be large-scaly stored and power load has the characteristics of randomness and volatility, in order to ensure the power system can provide a safe, reliable and continuous power supply, the power system must set sufficient reserve capacity electricity to guarantee the balance of electricity supply and demand. But this method not only increases the investment, but also lows the utilization of the electricity system capacity. The use of the energy storage technology can effectively reduce the system reserve capacity, lower system investment, improve utilization of existing equipment and supply reliability.This paper put forward a new way of energy storage of the power system-mechanical spring energy storage, it be used for energy storage of power system and peak shaving system with FM and so on.This paper studies the mechanical spring energy storage and generation system permanent magnet. Firstly, this paper analyze the system’s basic structure and working principle, establish the mathematical model of every components of the system and bring a system control strategy. Then use the PSCAD/EMTDC as a research tool to establish a simulation model of the system and make a verification of its operating characteristics. Spring energy storage system mainly consists of mechanical boxes, permanent magnet synchronous motor, dual PWM converter and control unit.etc. Establish the storage tank model, permanent magnet synchronous motor model and dual PWM inverter model, etc. Propose a control strategy, enabling the output of the mechanical spring energy storage tank can track the maximum power in real-time, so guarantee the power generation systems can output maximum power. In the PSCAD/EMTDC simulation platform, combined with the mathematical model and the proposed control strategy, to build the model of permanent mechanical spring energy storage power system simulation.Finally, based on the proposed control strategy to make simulations for power system steady-state characteristics, dynamic characteristics and power control in the PSCAD/EMTDC simulation platform. To verify that the situation of the step change in active power, reactive power and integrated active and reactive power. Simulation results show that the effectiveness and accuracy of the mechanical spring energy storage magnet power system simulation model and power control strategy.