摘要
基于罗氏线圈的电子式电流互感器与基于阻容分压原理的电子式电压互感器在智能变电站得到了广泛应用,这两种互感器都需要在外部做积分还原处理,才能获得被测信号,因此又称为外积分型互感器。积分形式有模拟积分与数字积分两种,其中模拟积分暂态性能好,但由于电子元器件的影响,测量精度受温度影响大;而数字积分不受温度影响,但对故障的暂态波形还原效果差。通过双积分采集回路处理和量程识别自动切换的方法,同时满足了故障时暂态性能及正常负荷时测量精度要求,避免了模拟与数字方法各自的缺点,提高了电子互感器的准确性与可靠性。
Electronic voltage transformer,weather based on Rogowski coil or resistive-capacitive divider,has been extensively accepted and applied in smart substation. However,in order to obtain measured signal,its output must be integral before used,so is also known as integral type transformer. Integrator can be divided into analog and digital. Due to the effect of temperature on the components,Analog integrator has an excellent transient performance. Digital integrator unaffected by temperature,but the reduction of transient waveform fault of poor results. By double integral collection processing,with the method of a range to identify automatically switching method. To avoid the disadvantages of analog and digital methods,accuracy requirements and the fault transient performance reduction are satisfied,accuracy and reliability of electronic transformer are improved.
出处
《东北电力技术》
2016年第10期1-4,8,共5页
Northeast Electric Power Technology
关键词
外积分
数据还原
模拟积分
数字积分
暂态性能
external integral
data reconstruction
analog integrator
digital integrator
transient performances
