基于直线电机的虚拟抽水蓄能系统运行控制策略

An operation control strategy for a virtual pumped storage system based on a linear motor

储能技术是智能电网的关键技术之一,对新能源大规模并网消纳、实现"两个替代"、完成能源结构转型具有重要意义。根据热力学原理分析,等温压缩空气储能技术在理论上具有更高的效率,因此提出了基于等温压缩空气储能原理的虚拟抽水蓄能系统,以及适用于该系统稳定运行的恒功率运行控制策略和适用于电力系统对储能电站功率可调控需求的功率调整运行控制策略,采用基于SVPWM的磁场定向矢量控制方法,借助MATLAB/SIMULINK平台,研究其基于直线电机的系统运行控制策略,通过仿真验证控制策略的可行性。

Energy storage technology is one of the key enabling technologies for smart grids.Compressed air energy storage(CAES)technology has the potential to provide a similar storage capacity as a pumped storage power station,which is characterized by a large system capacity,potentially low construction and operation costs,a long lifetime,long storage period and limited site selection.Thermodynamic principles suggest a high efficiency of the CAES with an isothermal operation.Therefore,a virtual pumped storage system(VPSS)based on the isothermal CAES is proposed in this work.A constant power operation control strategy suitable for a steady operation of VPSS and a power adjusting operation control strategy are proposed for the storage system.A simulation model of permanent magnet synchronous linear motor(PMLSM)is built within a MATLAB/SIMULINK environment and a magnetic field vector-oriented control method based on SVPWM is used to control the PMLSM.According to the system operation strategy and linear motor control strategy,the basic model of VPSS based on linear motor are simulated and the simulation results verify the feasibility of the proposed constant power operation control strategy.