In view of the fact that the existing methods cannot identify all the effective power supply paths for volt-age over-limit,which leads to problems of poor real-time performance and unobvious suppression effect in the voltage over-limit identification in distribution network,the voltage over-limit identification in distribution network with photo-voltaic(PV)power supply is studied based on a regulation function,so as to improve the corresponding real-time perfor-mance and effectiveness.First,an external characteristic model of PV power supply is constructed by using its physical mechanism,based on which a simulation model of PV power supply is built in the Matlab/Simulink software.According to the power relationship in distribution network with PV power supply,the voltage variation at the grid-connected point before and after the integration of PV power supply is calculated,and the mechanism of voltage over-limit is analyzed,so as to design the equivalent circuit of distribution network with PV power supply.All the effective power supply paths for voltage over-limit are specified,a candidate set of voltage over-limit regulation strategies for distribution network with PV power supply is set up in an decreasing order by means of the regulation function,and the candidate strategies are se-lected from the candidate set of regulation strategies to realize the voltage over-limit identification.The analysis results of an example show that the proposed method can effectively adjust the voltage of distribution network with PV power sup-ply to a normal state with less iteration times and a short execution time,indicating a high practicability.
维普
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