Distribution network groups with high proportion potovoltaics coordinate voltage control strategies
Voltage violation has become an important factor limiting the maximum integration capacity of photovoltaics.To address the issue of voltage violation caused by large-scale photovoltaic grid connection,the article proposes a grouped coordinated voltage control strategy for distribution networks with high proportions of photovoltaics.Firstly,based on the different voltage sensitivities of photovoltaic connection nodes in the distribution network,the concept of grouped coordinated control for photovoltaic inverters is introduced.Then,within each group of photovoltaic inverters,voltage control is carried out using capacity utilization ratio and power factor as consistent variables,while inter-group coordi-nation control ensures that the voltage at key nodes converges to the set value of 1.05 p.u..Finally,through case simulations,the proposed control strategy is verified to effectively suppress voltage violations in distribution networks,avoid unnecessary active power reduction,and demonstrate strong robustness during load and photovoltaic fluctuations.
voltage violationphotovoltaic power generationgroup coordination controlconsensus algorithm
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