According to physical signification,three metrical methods are introduced: optical communication stimulant method,extremal measure method and frequency doubling modulation method.
根据其物理意义,介绍了三种测量方法:光通信模拟法、极值测量法、倍频调制法。
In view of the fact that traditional CT calibration technique and devices can t meet the requirement of ECT calibration, According to IEC60044-8 and based on difference measurement method, an ECT calibration system and its circuits are discussed in this p.
针对传统电流互感器校验技术及装置无法满足新型电子式电流互感器校验要求的问题,本文根据IEC60044-8,对基于差值测量法的ECT模拟量输出校验技术、系统构成及误差进行了理论分析,并利用研制的校验系统进行试验,试验结果验证了所述方法及系统的正确性。