Contactless on-load automatic positive and negative voltage regulating tap switch device for three-phase distribution transformer
A technology of distribution transformers and tap changers, which is applied to the parts of transformers/inductors, transformers, electronic switches, etc. It can solve problems such as low withstand voltage, power outage of transformers, and small range of non-contact voltage regulation to achieve withstand voltage Low, large adjustment range effect
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specific Embodiment approach 1
[0060] Specific implementation mode one: refer to figure 1 , figure 2 , Figure 12 to Figure 17 Specifically explain this embodiment, a non-contact on-load automatic positive and negative voltage regulation tap changer device for a three-phase distribution transformer described in this embodiment, each phase winding of the distribution transformer to be voltage regulation includes a Basic working winding W0, one regulating winding W1 and one regulating winding W2,
[0061] The non-contact on-load automatic positive and negative voltage regulation tap changer device includes an isolation transformer T, a monitoring and control system 1, a three-phase trigger unit 2, a fault alarm unit and a three-phase voltage regulation circuit;
[0062] A regulating winding W1 and a regulating winding W2 are a set of windings with taps,
[0063] The three-phase voltage regulation circuits are all the same, and the A-phase voltage regulation circuit is taken as an example for illustration....
specific Embodiment approach 2
[0085] Specific implementation mode two: refer to Figure 4 Describe this embodiment in detail. This embodiment is a further description of a non-contact on-load automatic forward and reverse voltage regulating tap changer device for a three-phase distribution transformer described in the first embodiment. In this embodiment , the monitoring and control system 1 includes a voltage detection circuit 1-1, a No. 1 single-chip microcomputer control system 1-2, a voltage zero-crossing detection circuit 1-3 and a No. 1 power supply 1-4,
[0086] Fault alarm unit 3 comprises No. two power supply 3-1, No. two single-chip microcomputer control system 3-2 and SIM800 communication module 3-3,
[0087] The two output terminals of the first secondary coil of the transformer T are connected to the input terminal of the voltage detection signal of the voltage detection circuit 1-1, and the voltage signal output terminal of the voltage detection circuit 1-1 is connected to the voltage of the ...
specific Embodiment approach 3
[0092] Specific implementation mode three: refer to Figure 5 Describe this embodiment in detail. This embodiment is a further description of a non-contact on-load automatic forward and reverse voltage regulating tap changer device for a three-phase distribution transformer described in the second embodiment. In this embodiment , the No. 1 power supply 1-4 is realized by the chip model L7805 and the chip model LM2576, wherein, the linear power supply circuit composed of the chip model L7805 supplies power for the No. 1 single-chip microcomputer control system 1-2 and the fault alarm unit 3, and the model The switching circuit composed of the LM2576 chip provides power for the optocoupler group in the trigger unit 2 .
[0093] In this embodiment, the linear power supply circuit composed of L7805 in the No. 1 power supply supplies power to the chip on the monitoring board and the fault control board. Since the maximum supply current required by the optocoupler group in the trigg...
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