The measurement theorem of fiber optically driven instrument for high-voltage line current is presented. The PLL voltage-frequency-narrow pulse principle and its micro-consumption mechanism are proposed, followed by a...The measurement theorem of fiber optically driven instrument for high-voltage line current is presented. The PLL voltage-frequency-narrow pulse principle and its micro-consumption mechanism are proposed, followed by analysis on the two main factors affecting PLL measurement precision. A software design scheme using 80C196KB micro-controller is introduced. The experiment result is satisfactory.展开更多
覆冰绝缘子闪络过程中泄漏电流持续时间长 ,幅值变化大 ,用常规示波器很难测量 ,故据此特点设计了基于L ab View的覆冰绝缘子冰闪过程泄漏电流监测系统。通过设计制作前置处理电路及 L ab View编程来全过程监测覆冰污秽绝缘子闪络试验...覆冰绝缘子闪络过程中泄漏电流持续时间长 ,幅值变化大 ,用常规示波器很难测量 ,故据此特点设计了基于L ab View的覆冰绝缘子冰闪过程泄漏电流监测系统。通过设计制作前置处理电路及 L ab View编程来全过程监测覆冰污秽绝缘子闪络试验中及局部电弧发展变化过程中泄漏电流 ,并实现了波形显示、数据存储和分析。展开更多
基金NationalNaturalScienceFoundationofChina (No .6 974 80 0 1) KeySubjectSpecialFoundationofMechanicalBureau
文摘The measurement theorem of fiber optically driven instrument for high-voltage line current is presented. The PLL voltage-frequency-narrow pulse principle and its micro-consumption mechanism are proposed, followed by analysis on the two main factors affecting PLL measurement precision. A software design scheme using 80C196KB micro-controller is introduced. The experiment result is satisfactory.
文摘覆冰绝缘子闪络过程中泄漏电流持续时间长 ,幅值变化大 ,用常规示波器很难测量 ,故据此特点设计了基于L ab View的覆冰绝缘子冰闪过程泄漏电流监测系统。通过设计制作前置处理电路及 L ab View编程来全过程监测覆冰污秽绝缘子闪络试验中及局部电弧发展变化过程中泄漏电流 ,并实现了波形显示、数据存储和分析。