光伏电站多逆变器有功功率协调分配策略

An active power allocation strategy for photovoltaic power station with multi-inverter

不同厂家的逆变器有功功率调节速度差异较大,对光伏电站有功调节容量及调节效率产生影响,造成电网的不稳定和光伏电站的经济损失。针对以上情况,提出了一种光伏电站多逆变器有功功率协调分配策略。该策略利用快速调节逆变器使光伏电站输出功率在短时间内满足有功指令,并对不同调节速度的逆变器进行功率平衡。分析表明,该策略能够实现光伏电站功率调节的快速性和准确性,同时提高光伏电站的调节容量。

The difference in active power regulation speed of PV inverters produced by different manufacturers has a big influence on regulating capacity and efficiency,and causes the instability of power grid and economic loss.An active power allocation strategy for PV station with multi-inverter is presented.The strategy can make the output of PV station meet the power command and balance the output of inverters by using fast regulating inverters.Analysis shows the power command can be reached rapidly and accurately and the regulating capacity of PV station is improved by using the strategy.