考虑调频死区的电网一次调频能力评价指标

现有的在线估计一次调频能力的指标没有考虑调频死区对电网一次调频能力的影响。为了表征调频死区对电网一次调频能力的影响，提出利用均方差定义电网一次调频能力(Primary Frequency Modulation Ability，PFMA)指标。根据一次调频模型给出了其静态和动态表达式。最后通过计算仿真，对比了不考虑死区和不同死区大小情况下的评价指标曲线。结果表明，所提的指标同时兼顾了一次调频能力的动态特性和死区，实现了一次调频能力的在线全面评估。

Evaluation index of power grid primary frequency modulation considering dead zone

The existing online estimation of primary frequency modulation ability does not consider the effect of the dead zone on the primary frequency modulation of power grid. In order to characterize the effect of frequency modulation dead zone on the primary frequency modulation, the power grid primary frequency modulation capability (Primary Frequency Modulation Ability, PFMA) index is proposed by the means of square deviation. The static state and dynamic state expressions are given according to the primary frequency modulation model. Finally, the evaluation index curves without dead zone and under different dead zones are calculated by simulation. The results show that the dynamic characteristic and dead zone of primary frequency modulation capability are considered, and a comprehensive evaluation of primary frequency modulation capability is realized.