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When a critical technical problem and/or deviation occurs in a RES-E Generation Unit or an MV Private Network, the DSO is obliged to act accordingly to ensure the security and reliability of the Distribution Network. The detected problems are classified into one of the following three categories based on how they affect the safety and reliability of the Distribution Network:

i) Category 1: Problems that pose an immediate risk to the security and reliability of the Distribution Network and shall be treated immediately.

ii) Category 2: Problems that impact the real-time operational management of the Distribution Network and can endanger the reliability of the Power System.

iii) Category 3: Less significant technical problems and/or discrepancies that adversely affect the real-time operational management of the Distribution Network. 

After classifying the detected technical problems, the DSO issues escalating notifications to the Network User. According to the Transmission-Distribution Rules, the Network User is obliged to take immediate actions to rectify the detected problem and then inform the DSO for verification purposes.

If the detected technical problem and/or deviations are corrected, the DSO informs the Network User accordingly. Otherwise, and after the completion of the escalating notifications, the DSO is obliged to disconnect the RES-E Generation Unit or the MV Private Network from the Distribution Grid for security and reliability purposes. The RES-E Generation Unit or the MV Private Network will remain disconnected until the restoration of the technical problem and/or deviation.​

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