一种基于半波积分的电流幅值算法

A current amplitude algorithm based on half-wave integration

次同步过流保护是抽水蓄能机组在变频启动过程中必须设置的保护,针对天堂抽水蓄能电站机组变频启动过程中传统次同步过流保护时有误动的问题,提出了一种基于半波积分计算的频率无关算法。实例证明,该算法的精度不受频率变化影响,频率适应范围宽,谐波影响小。

Subsynchronous over-current protection is necessary for the protection of pumped storage unit in the process of variable frequency starting. For the mal-operation problem of subsynchronous over-current protection in the process of variable frequency starting for Tiantang pumped storage power plant,this paper proposed a frequency independent algorithm based on halfwave integration,and practical example proved that the accuracy of this algorithm is not affected by frequency. This algorithm has the advantages of wide frequency adaptation range and small harmonic wave influence.