介绍了国产首套500 kV直流电子式电流互感器的结构、原理、主要技术参数及工程应用情况。产品利用分流器传感直流电流；利用Rogowski线圈传感谐波电流；利用基于激光供能的远端模块就地采集分流器和Rogowski线圈的输出信号；利用光纤传送信号，可实现对直流电流和谐波电流的同时测量，具有绝缘结构简单可靠、体积小、质量小、线性度好、测量精度高、阶跃响应快等特点，实际工程应用表明，该产品运行稳定可靠，应用前景广阔。%Introduction was made to the structure, principle, main technical parameters and engineering application about the first domestic set of 500 kV DC electronic current transformers. This product made the shunt sense DC currents, the Rogowski coil sense harmonic currents, the remote module sample the output signals of the shunt and Rogowski coil based on laser energisation and the optical fiber transmit the measured signals, to realize measuring DC currents and harmonic currents at the same time. This product has the characteristics of simple insulation structure, small volume, light weight, good linearity, high accuracy, and quick step re-sponse. Practical engineering application shows that the product is stable and reliable in operation with broad application prospect.
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