Judging method of double-bus bus-coupled running mode
An operation mode and bus coupling technology, applied in the electrical field, can solve problems such as false tripping of live busbars, large safety hazards, etc., and achieve the effect of high judgment accuracy
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[0028] In the first case, the bus tie changes from no current to current, and there is no judgment of the operation mode (with no fault, the recognition accuracy is high):
[0029] Assuming that the operation mode of the double busbar is actually in parallel operation state, but the position node TWJ reflecting the state of the bus tie is wrong, which leads to the error correction of the misjudgment of the bus tie operation mode.
[0030] The difference flow before the error correction of the bus tie operation mode:
[0031] I mother small difference i d1 = I 1 +i 3 = I b1 -i m ;
[0032] II female small difference i d2 = I 2 +i 4 = I b2 +i m ;
[0033] i b1 Indicates the unbalanced current of I mother
[0034] i b2 Indicates the unbalanced current of the II mother
[0035] The bus tie current is included in the differential current after the small difference:
[0036] I mother small difference i d1 = I 1 +i 3 +i m = I b1 ;
[0037] II female small difference i d2 = I 2 +i 4 -i m = I b2 ;
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