The small-signal model of the photovoltaic generation system was built in a few references,and the sensitivity study of the dynamics process was performed.However,the dynamic model of the photovoltaic(PV)cells was not...The small-signal model of the photovoltaic generation system was built in a few references,and the sensitivity study of the dynamics process was performed.However,the dynamic model of the photovoltaic(PV)cells was not considered in these references,and the small-signal stability analysis and controllers'parameters design were not carried out using the proposed small-signal model.Therefore,a complete small-signal model of the photovoltaic generation system containing PV panels,inverters,controllers and power grid was built.The stability of the system after suffering a small disturbance was analyzed according to the eigenvalues.By means of eigenvalues participation factors analysis,the sensitivity of each mode to state variables was learnt,thereby the origin and characteristics of each mode was disclosed.Then,the eigenvalues traces were calculated,according to which controller's parameters were designed.A simulation model of the system based on Matlab/Simulink was presented.The simulation results show that the system is stable after suffering small disturbance of solar radiation intensity step,the design of the controller's parameters is proper,and the system dynamic responses are consistent with the result of small-signal analysis,which proved that the small-signal modeling and analysis in this paper are correct.展开更多
文摘The small-signal model of the photovoltaic generation system was built in a few references,and the sensitivity study of the dynamics process was performed.However,the dynamic model of the photovoltaic(PV)cells was not considered in these references,and the small-signal stability analysis and controllers'parameters design were not carried out using the proposed small-signal model.Therefore,a complete small-signal model of the photovoltaic generation system containing PV panels,inverters,controllers and power grid was built.The stability of the system after suffering a small disturbance was analyzed according to the eigenvalues.By means of eigenvalues participation factors analysis,the sensitivity of each mode to state variables was learnt,thereby the origin and characteristics of each mode was disclosed.Then,the eigenvalues traces were calculated,according to which controller's parameters were designed.A simulation model of the system based on Matlab/Simulink was presented.The simulation results show that the system is stable after suffering small disturbance of solar radiation intensity step,the design of the controller's parameters is proper,and the system dynamic responses are consistent with the result of small-signal analysis,which proved that the small-signal modeling and analysis in this paper are correct.
