Novel hybrid topology multifunctional power electronics distribution network device and control method
A hybrid topology, power electronics technology, applied in the power field, can solve the problems of low equipment usage, difficult detection, weak current signal, etc.
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[0039] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings; it should be understood that the preferred embodiments are only for illustrating the present invention, rather than limiting the protection scope of the present invention.
[0040] figure 1 It is the topological diagram of the distribution network and the structural diagram of the inventive device; figure 2 It is a schematic structural diagram of an inventive device with a cascaded H bridge as an embodiment; image 3 It is a structural schematic diagram of a multifunctional device with two-level inverter and step-up transformer as an embodiment; Figure 4 It is a control algorithm block diagram of the present invention; Figure 5 To measure the equivalent circuit of line-to-ground capacitance; Figure 6 Schematic diagram of the fault signature current detector layout for single-phase-to-earth fault location in distribution network.
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