用于快速响应负荷需求的两段式斜坡重力储能系统放电功率调节方法

Discharging Power Adjustment of Two-Stage Ramp-Type Gravity Energy Storage System for Fast Response to Load Demand

斜坡式重力储能系统(GESS)放电时通常将上堆场重物块运送至下堆场。然而,当放电过程中系统负荷需求出现波动时,现有方案难以通过及时调整重物块数量来调节输出功率,导致重力储能系统响应不及时并造成额外能量损耗。通过在斜坡两侧增加辅助堆场并将斜坡分为两段,通过控制顶部堆场重物块释放数量、斜坡堆场释放高度以及斜坡堆场重物块抓取位置,实现了重力储能系统输出功率的精确控制与负荷需求的快速响应。基于Matlab/Simulink平台搭建了两段式斜坡重力储能系统仿真模型,验证了所提方法的正确性与有效性。研究成果为斜坡式重力储能系统放电功率的快速调节与精确控制提供了重要参考。

Generally,discharging conditions of ramp-type gravity energy storage system(GESS)can be realized by transporting heavy blocks from the upper stacking yard to the lower one.However,the number of heavy blocks may not be adjusted timely when load demand fluctuates during discharging process,which may cause the delayed response and additional energy loss of GESS.By configuring auxiliary heavy blocks stacking yards on both sides of the ramp rail and dividing the traditional ramp into two segments,precise control on discharging power and fast response to load demand can be realized by controlling the releasing heavy blocks quantity on the top stacking yard,the releasing height of the ramp stacking yard and the grab position of heavy blocks on the ramp stacking yard.With Matlab/Simulink,the simulated model of two-stage ramp-type GESS is established,and the correctness and effectiveness of the presented method are verified.The achievement can provide an important reference for the discharging power adjustment and precise control of ramp-type GESS.