柔性直流光纤电流互感器阶跃响应特性研究

Research on Step Response Characteristics of Flexible DC Fiber-optic Current Transformer

传统直流光纤电流互感器无法满足柔性直流输电工程的高速响应需求,因此需要研究直流光纤电流互感器的阶跃响应特性及其动态性能改善方法。文中结合直流光纤电流互感器的离散数学模型,对其动态特性进行了全面的仿真、计算和实验研究,结果表明:影响直流光纤电流互感器阶跃响应特性的关键参数是渡越时间、前向通道增益、滤波器阶数和通讯延迟。搭建了直流光纤电流互感器阶跃响应测试平台,经参数优化后的直流光纤电流互感器的阶跃响应上升时间小于50μs,满足相关应用要求。

The conventional DC fiber-optic current transformer(FOCT)cannot meet the high-speed response requirements of flexible DC transmission engineering,so the step response characteristics of DC FOCT and its dynamic performance improvement methods need to be studied.In this paper,a comprehensive simulation,calculation and experimental study of its dynamic characteristics are performed in combination with the discrete mathematical model of the DC FOCT.The results show that the key parameters affecting the step response characteristics of DC FOCT are transit time,forward channel gain,filter order and communication delay.A step response test platform for DC FOCT is set up,and the step response rise time of the DC FOCT is less than 50μs after parameter optimization,which meets the relevant application requirements.