【摘要】 通过对模拟现场生产实际的实验分析,对煤电钻综合保护装置工作不稳定性进行研究,得出了综合保护装置工作不稳定的主要原因,在于使用的载频短路保护技术特性不稳定;而影响载频短路保护技术特性的主要原因,在于电源供电网络参数通过主变压器反馈,改变了载频振荡器的谐振槽路参数,谐振频率发生变化,迫使振荡器振幅降低,甚至停振。更多还原

【Abstract】 An experience is simulating spot producing,has been taken to research the instability of integrated protection equipment for coal electronic drill.Some main reasons of the instability of integrated protection equipment point to the instability of carrier frequency short circuit protection.Those affect the stability of carrier frequency short circuit protection are feedbacks of power supply network parameter from main transformer,which changed syntony groove parameter of carrier frequency oscillator.The changed syntony frequency due to reduced swing of oscillator,and finally to stop vibration.更多还原