Capacitive voltage transformer transient error digital correcting method
A voltage transformer and digital correction technology, which is applied to instruments, measuring electrical variables, measuring devices, etc., can solve problems such as capacitive voltage transformers cannot be tracked quickly, fault distance measuring devices are not working properly, etc.
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[0080] The following is attached Figure 5 The present invention is further described:
[0081] attached Figure 5 It is an example model. The example model comes from the capacitive voltage transformer model adopted by the dynamic model laboratory of China Electric Power Academy. The dotted line box is the capacitive voltage transformer. figure 2 The structure is similar.
[0082] The component parameters in the instance model are as follows:
[0083] 1) 500kV capacitive voltage transformer equivalent circuit parameters (equivalent to the primary side)
[0084] C 1 = 0.0047μF, C f = 0.00236μF, R 2 =1551.57Ω
[0085] C2 = 0.1203μF, L f =417.6H,L 2 =3690H
[0086] L 1 =80H,R f =100.8KΩ, R 1 =1.113KΩ
[0087] PT transformation ratio: U I / U II / U III = 12 kV / 100 ...
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