Accurate grid-connected control method and system for gravity energy storage system

The invention discloses a gravity energy storage system accurate grid-connected control method and system based on weight distribution and data processing, and the method comprises the steps: carrying out the data selection and processing of a terminal voltage phase, amplitude and frequency index in a synchronous power generation/motor operation process, and improving the precision of a terminal voltage index when a power generation/motor is in grid connection; transient impact current during grid connection is reduced, safe and stable operation of a synchronous power generation/motor grid-connected system is guaranteed, and the quality of electric energy supplied to a power grid by a vertical gravity energy storage system is improved. 本发明公开了一种基于权重分配及数据处理的重力储能系统精确并网控制方法及系统，该方法通过对同步发电/电动机运行过程中的机端电压相位、幅值及频率指标进行数据选取与处理，提高了发电/电动机并网时机端电压指标的精度，降低了并网时的瞬态冲击电流，保证了同步发电/电动机并网系统的安全稳定运行，提高了垂直式重力储能系统向电网供电的电能质量。