系统铁磁谐振的抑制研究

电磁式电压互感器(PT)被广泛地应用于供电系统,同时也是系统中必不可少的电气元件。当系统发生故障时,PT会由正常工作状态进入饱和状态发生铁磁谐振,而铁磁谐振过电压严重威胁着整个系统的稳定运行,因此合适的消谐措施在不同状态下的恰当使用,就显得至关重要了。本文首先由实测数据得到PT在空载状态时的伏安特性曲线,然后逐点递推得到对应的磁链电流特性曲线。通过分析铁磁谐振的产生机理,再结合多种影响铁磁谐振的因素,最后经电磁暂态仿真计算软件(ATP-EMTP)建立的系统仿真模型,对常用的几种消谐措施的适应性进行了比较分析。

Undertaking the National and Historic Mission——New Year's Message for 2013

Spring is a vibrant and thriving season when everything looks fresh and new.In such a moment full of hope,I would like to give my best wishes to all the readers of International Understanding on behalf of CAFIU."The relationship between two countries relies on the friendly sentiments between their peoples".The friendly relationship between two countries is,in the final analysis,decided by the friendship between the two peoples.