一种新型的基于风速预测的风力发电系统蓄电池充放电控制策略

摘要

为了使风力发电系统的有功出力波动维持在规定的范围内,同时保证系统的蓄电池储能水平基本保持不变,使系统能有效地应对输入功率突然增加及输出功率急剧下降的紧急情况,在风速预测的基础上提出一种新型的风力发电系统蓄电池充放电控制策略.当预测的风力发电系统输入功率的波动超过规定的功率变化范围时,通过对蓄电池的充放电控制以减弱网侧功率的波动,并且使蓄电池的充放电能量在一个周期内基本平衡,从而保证系统预留一定容量的储能装置以接收大功率输入或补充严重不足的并网功率,有效地减少了风能损失、提高了系统的效率.仿真结果验证了所提控制策略的有效性和可靠性.%In order to maintain the active power fluctuations of the wind power generation system within the specified range and ensure the energy storage balance of battery system basically to cope with the sudden increase in the input power or the sudden drop in the output power effectively,a new charging/discharging control strategy for battery in wind power generation system based on wind speed prediction is proposed.When the predictive input power fluctuations of wind power generation system exceed the specified range of power change,the charging and discharging power of battery is controlled to decrease the power fluctuations in the grid side and to make the charging and discharging energy of battery balance basically within a cycle.Then,a certain capacity of energy storage device is reserved to receive the high power input or compensate for the serious shortage of grid power,the wind energy loss is reduced and the system efficiency is improved effectively.Simulative results verify the effectiveness and reliability of the proposed control strategy.