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Commission Regulation (EU) 2017/2196 of 24 November 2017 establishing a network code on electricity emergency and restoration (Text with EEA relevance)
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1.The re-energisation procedure of the restoration plan shall contain a set of measures allowing the TSO to apply:
(a)a top-down re-energisation strategy; and
(b)a bottom-up re-energisation strategy.
2.Regarding the bottom-up re-energisation strategy, the re-energisation procedure shall contain at least measures for:
(a)managing voltage and frequency deviations due to re-energisation;
(b)monitoring and managing island operation; and
(c)resynchronising island operation areas.
1.When activating the re-energisation procedure, each TSO shall set up the strategy to be applied, taking into account:
(a)the availability of power sources capable of re-energisation in its control area;
(b)the expected duration and risks of possible re-energisation strategies;
(c)the conditions of the power systems;
(d)the conditions of the directly connected systems, including at least the status of interconnectors;
(e)the high priority significant grid users listed pursuant to Article 23(4); and
(f)the possibility to combine top-down and bottom-up re-energisation strategies.
2.When applying a top-down re-energisation strategy, each TSO shall manage the connection of load and generation with the aim to regulate the frequency towards the nominal frequency with a maximum tolerance of the maximum steady-state frequency deviation. Each TSO shall apply the conditions for connection of load and generation defined by the frequency leader, where appointed in accordance with Article 29.
3.When applying a bottom-up re-energisation strategy, each TSO shall manage the connection of load and generation with the aim to regulate the frequency towards the target frequency established in accordance with point (c) of Article 28(3).
4.During re-energisation, the TSO shall, after consultation with DSOs, establish and notify the amount of netted demand to be reconnected on distribution networks. Each DSO shall reconnect the notified amount of netted demand, while respecting the block loading and taking into account the automatic re-connection of load and generation in its network.
5.Each TSO shall inform its neighbouring TSOs on its capability to support a top-down re-energisation strategy.
6.For the activation of a top-down re-energisation strategy, the TSO shall request neighbouring TSOs to support the re-energisation. This support may consist in assistance for active power, in accordance with paragraphs 3 to 5 of Article 21. The requested TSOs shall provide assistance for the re-energisation, unless it would lead their systems to the emergency or blackout states. In this case, the requesting TSO shall use the bottom-up re-energisation strategy.
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