Reconstruction of saturated current transformer signals

Details Reconstruction of saturated current transformer signals Reconstruction of saturated current transformer signals

H - Electricity

01

F

H01F 27/42 (2006.01) H02H 1/00 (2006.01) H02H 1/04 (2006.01) H01F 40/14 (1990.01)

Patent

CA 2126867

2126867 9313581 PCTABS00024 The invention relates to a numerical method which via discrete-time measurements of the secondary current (is(k)) from a current transformer reconstructs the primary current (ipr(k)) and the secondary current (isr(k)) of a saturated current transformer, which takes place in a block B1 and a method for detecting saturation as well as for detecting when saturation ceases, which takes place in blocks B2, B3, B4, B5, B6 and B7. The output signals of the method are obtained via a block B8 and upon a decision about saturated current transformer, the output signals consist of the reconstructed primary current (ipn(k)) and the reconstructed secondary current (isn(K)) and upon a decision about unsaturated current transformer, the output signals consist of the reconstructed primary current (ipn(k)) and the measured secondary current (is(k)). The invention also relates to a device for carrying out said methods.

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