Novel experimental platform for switching operation of microgrid and experimental method

Abstract

The invention discloses a novel experimental platform for switching operation of microgrid and an experimental method. The experimental platform comprises an array simulation module, an inversion module, an intelligent control module, an energy monitoring module, an automatic reclosing module, a main power supply module, a load module, an energy storage system, and a host computer. The array simulation module provides energy sources with different characteristics for the inversion module. The inversion module comprises a grid-connected inversion module and an off-grid inversion module arrangedin parallel. The grid-connected inversion module comprises a grid-connected inverter, and the off-grid inversion module comprises an off-grid inverter. The energy monitoring module is configured to monitor power output parameters of the grid-connected inversion module. The automatic reclosing module is provided with a PCC switch for receiving an input signal of the energy monitoring module, and realizes on / off between the microgrid and a large power grid by controlling on / off of the PCC switch. The novel experimental platform for switching operation of the microgrid and the experimental method allow a trainee to quickly understand working process and working principle of an intelligent microgrid device, reduce volume and cost of the grid-connected inverter, and are advantageous to know power quality level of the large power grid in time.

Description

technical field [0001] The invention relates to the technical field of new energy experiment platforms, in particular to a novel microgrid switching operation experiment platform and an experiment method. Background technique [0002] 1. The existing smart micro-grid equipment simulates the occurrence of faults through external signals, and at the same time drives the PCC switch to open, disconnects the grid-connected line and enters off-grid operation. After the fault signal disappears, the PCC switch is closed and the grid-connected line is restored; the used Grid-connected inverters are large in size, high in cost, low in energy utilization, and poor in resistance to partial shadowing; [0003] 2. The existing smart micro-grid equipment cannot automatically detect the voltage, current, leakage and other operating conditions at the PCC point. When a fault occurs, the PCC switch automatically and quickly cuts off the grid-connected line and enters off-grid operation. After ...

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Problems solved by technology

[0004] In order to solve the deficiencies in the prior art, the present invention provides a novel micro-grid switching operation experimental platform and experimental method, which solves the problem of large volume, high cost, low energy utilization rate, and resistance to local shadows of grid-connected inverters in the prior art. Poor capacity, unable to meet the grid connection of low-power photovoltaic modules, and unable to monitor the harmonic content in the grid-connected grid, and unable to evaluate the power quality level of the grid

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