集成式零序电流互感器在电力系统选线中的应用研究

Application Research of Integrated Zero Sequence Current Transformer in Power System Route Selection

为满足小零序电流信号的测量要求,利用Ansoft Maxwell软件建立模型进行仿真,结合试验结果分析,设计了一款将零序电流互感器与信号处理、采样、传输电路集成于一体的集成式零序电流互感器。运用数字信号进行零序电流的传输,避免了微弱的零序电流信号在传输过程中受到干扰,防止小的电流信号被干扰淹没;采用模块化设计,增强了系统的可扩展性与易维护性。

In order to meet the measurement requirements of small zero sequence current signal, by using Ansoft Maxwell to model and simulate, combined with experimental results and then an integrated zero sequence current transformer that integrates the circuit of signal processing, sampling , and transmission into one was designed. It uses digital signal to carry on the transmission of zero sequence current, so that it can prevents the small current signal＇s interference during transmission, and prevents the small current signal being drowned by the disturbances. By using modular design, the system can enhance the cxttendibility and maintainability of the system.