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Electronic current transformer (ECT) is widely used in smart grid, especially intelligent substation. However, fault is unavoidable for ECT in long term operation. In this paper, the fault of an 110kV independent ECT based on low-power current transformer is an example to analyze the reasons for the fault via reasonable analyzing methods and proposed the corresponding treatments.
Embarking from the sensing principle of electronic transformer, the paper introduced the type and the constitution of electronic current transformer and electronic voltage transformer. By comparing the active and passive optical transformer in our country, we pointed out that the passive optical transformer have excellent measurement quality, it also have the same practical conditions as the active...
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