煤电钻综合保护装置工作不稳定性研究

Study on Working Instability of Integrated Protector for Coal Electric Drill

通过模拟现场生产实际的实验分析方法,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的重要结论;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。

By the test analysis methods of simulating field production, we study on the working instability of integrated protector for coal electronic drill. The main reason of the instability of integrated protector is that the technology of carrier frequency short circuit protection is instability. And the main reason that affects the character of carrier frequency short circuit protection technology is feedbacks of power supply network parameter through main transformer, which changed syntony groove parameter of carrier frequency oscillator. The changed of syntony frequency reduces amplitude of oscillator, and even stopping oscillator.