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在电力系统中,往往由于电压互感器磁路饱和的激发,出现持续的较高幅值的谐振过电压。这种可以是基波,也可以是高次谐波和分次谐波的过电压,会引起绝缘闪络、避雷器爆炸:或产生高值零序电压分量,造成虚幻接地现象和不正确接地指示;或者在电压互感器中引起过电流,使熔断器熔断或互感器烧毁,危及电力系统安全运行。我们研制的自动消谐装置,应用计算机技术,能快速、准确判断和消除铁磁谐振故障,确保系统可靠运行。
In power systems, continuous higher-amplitude resonant overvoltages often occur due to the saturation of the voltage transformer magnetic circuit. This can be a fundamental wave or an overvoltage of harmonics and subharmonic harmonics that can cause an insulation flashover and an arrester to explode: or produce a high zero-sequence voltage component, resulting in an illusory ground fault and an improper ground indication ; Or in the voltage transformer caused by over-current, the fuse blown or transformer burned, endangering the safe operation of the power system. We developed a self-harmonic elimination device, the application of computer technology, can quickly and accurately determine and eliminate ferroresonance failure to ensure the reliable operation of the system.