SPD在线检测与离线检测差异研究

Study on Differences between SPD Online Detection and Off-line Detection

文章闸述了一种多参数SPD在线状态检测方法及通过对GB/T 21431与GB/T 18802.1二个规范的研读,解析了在线监测电压与标准中提出的测量电压的本质上的一致性。通过对氧化锌压敏电阻(MOV)在小电流交流工作状态下数学模型的研究,描述了MOV工频交流检测与直流检测二两种方法上的差异由来,指明了传统理论模型的不足,为产品设计和应用提供了理论依据。

This paper described a multi-parameter SPD online state detection method andanalyzed the essential consistency between the online monitoring voltage and the measurement voltage proposed in the standard through the GB/T 21431 and GB/T 18802.1 two specifications of the study. Based on the study of mathematical model of zinc oxide varistor （MOV） in the working state of small current AC, the difference of two methods of AC frequency AC detection and DC detection was described, and the deficiency of traditional theoretical model was pointed out.Product design and application provided a theoretical basis.