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Summary Distributed energy resources (DERs) have a significant impact on the network's short‐circuit level and fault current direction, but it is almost impossible to precisely predict the presence of DERs in the distribution network. Hence, implementation of new settings for protection system based on a specific scenario for distributed generator, in terms of location and penetration level, is not a suitable solution. Utilization of adaptive protection and changing the overall design of protection system are very expensive and in many cases inapplicable. Consequently, it is crucial to propose a new method guaranteeing proper operation of protection system for any scenario of DERs based on the existing structure of distribution networks. This article proposes a new method evaluating the precise impact of photovoltaic resources on fault current profile and coordination of protective devices. Moreover, the proposed algorithm can update the settings of protective equipment, keeping protection coordination in distribution networks with variable penetration level of photovoltaic resources. Furthermore, the proposed method preserves fuse‐recloser coordination according to fuse saving theorem for transient faults.