Capacitance DC (Direct Current) blocking on-off controllable bridge circuit for inhibiting DC magnetic bias of transformer
A DC blocking and transformer technology, which is applied in the field of capacitive DC blocking and controllable breaking bridge circuit, can solve the problems of not being able to fully guarantee the safety of capacitors and affecting the correct operation of relay protection, and achieve reliable performance, inhibiting the flow of DC components into transformers, The effect of ensuring system security
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[0013] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0014] see figure 1 , the capacitive DC-blocking controllable breaking bridge circuit for suppressing the DC bias of the transformer of the present invention includes: a bypass grounding circuit 3, a transformer neutral line grounding switch K 1 5. DC blocking switch K 2 4. The DC blocking capacitor C1 and the transient current suppression bridge circuit 2, the bypass grounding loop 3 is composed of a current-limiting inductance L 2 connected in parallel with the first thyristor T 2 , the second thyristor T 3 Composed in series; the transient current suppression bridge circuit 2 consists of a rectifier diode D 1 ~D 4 , DC inductance L 1 , Freewheeling diode D 5 , Voltage transformer PT, Hall current transformer CT 2 and controllable switching tube T 1 composed, in parallel, of a DC inductor L 1 , Freewheeling diode D 5 And voltage ...
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