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CN101452016A 电压暂降检测方法和装置 无效 - 驳回

电压暂降检测方法和装置
摘要：
本发明提供了一种电压暂降检测方法，包括以下步骤：a)对交流电源在时间t1和t2采样电压，分别得到u1和u2，其中，交流电源的正常供电电压u＝Usin(ωt+φ)；b)求出变化幅值ΔU：c)判断是否ΔU＞|Δu|，如果是，则判定发生了电压暂降，其中Δu是预设的允许电压暂降值。本发明还提供了电压暂降检测装置。本发明能准确地判断电压暂降，并精确地计算电压暂降的相位跳变角度值。
摘要（英）：

The invention provides a voltage dip testing method, comprising the steps of: a) sampling voltage on AC power at the moment t1 and t2, respectively obtaining u1 and u2, wherein normal supply voltage u of the AC power is equal to U sine(omega t + phi); b) obtaining changing amplitude delta U; c) judging whether delta U > |delta u|, if true, voltage dip happens, wherein delta u is the presupposed allowable voltage dip value. The invention also provides a voltage dip testing device. The invention accurately judges the voltage dip, and accurately computes phase jump angle of the voltage dip.

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