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CN104950196A 一种识别电力系统振荡中心的复合判据方法 无效 - 驳回

一种识别电力系统振荡中心的复合判据方法
摘要：
本发明涉及一种识别电力系统振荡中心的复合判据方法，所述方法包括(1)准备数据源；(2)计算相量OZ'模值；(3)函数OZ'(E1)求极值；(4)振荡中心初步判别；(5)振荡中心再次判别。本发明解决了当线路两端电压相角差在0度或360度(360度整数倍)的一段时间段内发生判断结果出错的情况，保证了当系统发生失步时，可以快速地、准确地、有效地定位振荡中心。利用复合判据方法还可以计算振荡中心的电压，判断系统是否失步。
摘要（英）：

The invention relates to a combined criterion method for identifying the oscillation center of a power system. The method includes: (1) preparing a data source; (2) computing a phasor OZ' modulus value; (3) finding an extreme value with a function OZ'(E1); (4) preliminarily identifying the oscillation center; (5) re-identifying the oscillation center. By the method, the problem that judgment result errors happen within a certain period of time when voltage phase angle difference of two ends of a line is 0 degree or 360 degrees (integer multiples of 360 degrees) is solved, and the oscillation center can be quickly, accurately and effectively positioned when the system is out of step. By the combined criterion method, voltage of the oscillation center can be calculated, and whether the system is out of step or not can be judged.

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