继电保护装置用微型电流—电压变换器暂态特性分析

Transient analysis of micro current-boltage transformer for relay protection instrument

微型电流—电压变换器由于原理上的优点,在微机继电保护装置中得到了广泛的应用。微型电流—电压变换器具有磁芯,在短路电流的暂态过程中,磁性元件性能的非线性,影响微型电流—电压变换器的传变性能,使之传递信息不准确,波形畸变,继电保护装置会发生错误的动作,影响装置工作的可靠性。分析研究微型电流—电压变换器在暂态条件下的特性,对改进和合理使用微型电流—电压变换器,提高继电保护装置的工作可靠性很有意义。

micro current-voltage transformer has been widely used in applications of relay protection instrument because of its features.But the magnetic core equipped in the micro current-voltage transformer would effect the transfer behavior of the micro current-voltage transformer because of its non-linearity character in the transient process of short-circuit current,resulting the inaccuracy signal transmission,unwanted waveform distortion,incorrect relay protection instrument actions and system instability.Thus t...