Voltage stability analysis of new energy based on IMPMMS grid connection
In view of the problem that the high proportion of new energy grid-connected leads to the volt-age stability of the new energy grid and the risk of the unit being disconnected from the grid,the inertia motivity permanent magnet machine set(IMPMMS)has the voltage compensation capability for the sys-tem,which can meet the reactive power requirements of the new energy grid.According to the structure and working principle of the IMPMMS,the voltage compensation mechanism of the permanent magnet generator set was analyzed,and the influencing parameters that affect its reactive power regulation ability were deduced.Combined with the state equation of the new energy through the grid connection of the IM-PMMS,the simulation model of the power system was established,and the voltage compensation capabili-ty and the voltage isolation effect of the IMPMMS and the traditional generator set under different degrees of voltage drop were compared,and finally a scaled prototype was developed.The simulation and test re-sults show that the greater the voltage drop on the grid side,the stronger the voltage compensation capa-bility of the IMPMMS,and the mechanical isolation of the IMPMMS can isolate the impact of the fault on the new energy generator set,prevent the risk of new energy off-grid and improve the voltage stability of the entire new energy power generation system.
high proportion of new energyinertia motivity permanent magnet machine setvoltage com-pensation capabilityvoltage isolationvoltage stability
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