System States. 2.2.1 Rules & Methodologies ▇▇▇▇ defines the following five system states: • Normal state • Alert state • Emergency state • Blackout state • Restoration state Normal state and alert state are both subject to SOGL whereas emergency state, blackout state and restoration state are subject to Network Code Emergency and Restoration (hereinafter referred to as “NC ER”). In the following the different system states are briefly described according definition of the SOGL: Normal state Normal state means a situation in which the system is within operational SOGL 3(2)(5) security limits in the N-situation and after the occurrence of any contingency from the contingency list, taking into account the effect of the available remedial actions.
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System States. 2.2.1 Rules & Methodologies ▇▇▇▇ SOGL defines the following five system states: • Normal state • Alert state • Emergency state • Blackout state • Restoration state Normal state and alert state are both subject to SOGL whereas emergency state, blackout state and restoration state are subject to Network Code Emergency and Restoration (hereinafter referred to as “NC ER”). In the following the different system states are briefly described according definition of the SOGL: Normal state Normal state means a situation in which the system is within operational SOGL 3(2)(5) security limits in the N-situation and after the occurrence of any contingency from the contingency list, taking into account the effect of the available remedial actions.
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Sources: Nordic System Operation Agreement (Soa) – Annex Operational Security (Os)