用于高压直流的光电电流互感器研究

Study on the Hybrid-optical Direct Current Transducer Used for HVDC

介绍了一种光电电流互感器的基本原理。针对传统互感器的不足,提出了全新的设计方案,使用分流器作为传感头,配以数字化处理电路,采用了光供电和光纤传输数据,并同时给出模拟和数字两种输出。初步试验表明,该方案切实可行。这种互感器动态性能好,在体积、重量和造价方面优势明显,有望在直流输电中获得应用。

The principle of the hybrid-optical direct current transducer is introduced. Aiming at the shortcomings of conventional transformer, a new design is adopted, which uses ohmic shunt as sensor, optical fiber to send digitized data, gets power for controlling unit at high potential terminal from optical source, and has the outputs in both analog and digital formats. The experiment results indicate this method is feasible. And it has good dynamic performance and advantages with size, weight and costs. It will be used for HVDC in the future.