利用正交双路光纤传输光电流信号的处理方法,满足了光纤电流互感器在电力系统暂态保护应用中的实时处理要求.此方法可从正交双路光信号中直接提取两路电流信息,减小了光路传输不理想对电流测量值的影响.结合模数变换过采样技术和先进的数字信号处理技术,提高了系统对暂态故障的响应速度,改进了检测性能.实验表明,此方法在暂态信号的采集和实时处理方面,比现有方法的迟延小且精度高.

An approach to implementing quadrature double paths OCT and the corresponding signal processing method is presented, meeting the real time processing requirement of electric power transient protection. The current signal can recover directly through the double paths while suppressing the effects of ripples in optical paths. By over sampling in data converting and advanced digital signal processing technique, the response delay to transient failure is lowered down and the detecting performance is improved.The experiment proves this method has lower processing delay and higher precision than the conventional one.