Limited Operational Notification (LON)
European Union Electricity Market Glossary


 

Limited Operational Notification (LON) is a notification issued by the relevant system operator to a power generating facility owner, demand facility owner, distribution system operator or HVDC system owner who had previously attained FON (Final Operational Notification) status but is temporarily subject to either a significant modification or loss of capability resulting in non-compliance with the relevant specifications and requirements (Article 2(65) of the Network Code on Requirements for Grid Connection of Generators (NC RfG)).

 

 

 

Article 37 of the Network Code on Requirements for Grid Connection of Generators
Limited operational notification for type D power generating modules

 

1. Power generating facility owners to whom a FON has been granted shall inform the relevant system operator immediately in the following circumstances:

(a) the facility is temporarily subject to either significant modification or loss of capability affecting its performance; or

(b) in the event of equipment failure leading to non-compliance with some relevant requirements.

 

2. The power generating facility owner shall apply to the relevant system operator for a LON, if the power generating facility owner reasonably expects the circumstances described in paragraph 1 to persist for more than three months.

 

3. A LON shall be issued by the relevant system operator and shall contain the following information which shall be clearly identifiable:

(a) the unresolved issues justifying the granting of the LON;

(b) the responsibilities and timescales for the expected solution; and

(c) a maximum period of validity which shall not exceed 12 months. The initial period granted may be shorter with the possibility of an extension if evidence is submitted to the satisfaction of the relevant system operator demonstrating that substantial progress has been made towards achieving full compliance.

 

4. The FON shall be suspended during the period of validity of the LON with regard to the items for which the LON has been issued.

 

5. A further extension of the period of validity of the LON may be granted upon a request for derogation made to the relevant system operator before the expiry of that period, in accordance with the derogation procedure described in Title V.

 

6. The relevant system operator shall have the right to refuse to allow the operation of the power generating module, once the LON is no longer valid. In such cases, the FON shall automatically become invalid.

 

7. If the relevant system operator does not grant an extension of the period of validity of the LON in accordance with paragraph 5 or if it refuses to allow the operation of the power generating module once the LON is no longer valid in accordance with paragraph 6, the power generating facility owner may refer the issue for decision to the regulatory authority within six months after the notification of the decision of the relevant system operator.

 

 

 

A LON is also present in the provisions of the Network Code on Demand Connection (see box).

 

 

 

Article 26
 of the Network Code on Demand Connection

Limited operational notification

 

1.Transmission-connected demand facility owners or transmission-connected distribution system operators to whom a FON has been granted, shall inform the relevant TSO, no later than 24 hours after the incident has occurred, of the following circumstances:
(a) the facility is temporarily subject to either significant modification or loss of capability affecting its performance; or
(b) equipment failure leading to non-compliance with some relevant requirements.

A longer time period to inform the relevant TSO can be agreed with the transmission-connected demand facility owner or transmission-connected distribution system operator depending on the nature of the changes.

 

2. The transmission-connected demand facility owner or transmission-connected distribution system operator shall apply to the relevant TSO for a limited operational notification (LON), if the transmission-connected demand facility owner or transmission-connected distribution system operator expects the circumstances described in paragraph 1 to persist for more than three months.

 

3. A LON shall be issued by the relevant TSO and shall contain the following information which shall be clearly identifiable:

(a) the unresolved issues justifying the granting of the LON;

(b) the responsibilities and timescales for expected solution; and

(c) a maximum period of validity which shall not exceed 12 months. The initial period granted may be shorter with the possibility of an extension if evidence is submitted to the satisfaction of the relevant TSO demonstrating that substantial progress has been made towards achieving full compliance.

 

4. The FON shall be suspended during the period of validity of the LON with regard to the items for which the LON has been issued.

 

5. A further extension of the period of validity of the LON may be granted upon a request for a derogation made to the relevant TSO before the expiry of that period, in accordance with the derogation procedure described in Chapter 2 of Title V.

 

6. The relevant TSO shall have the right to refuse to allow the operation of the transmission-connected demand facility, the transmission-connected distribution facility, or the transmission-connected distribution system once the LON is no longer valid. In such cases, the FON shall automatically become invalid.

 

7. If the relevant TSO does not grant an extension of the period of validity of the LON in accordance with paragraph 5 or if it refuses to allow the operation of the transmission-connected demand facility, the transmission-connected distribution facility, or the transmission-connected distribution system once the LON is no longer valid in accordance with paragraph 6, the transmission-connected demand facility owner or transmission-connected distribution system operator may refer the issue for decision to the regulatory authority within six months after the notification of the decision of the relevant TSO. 

 

 

 

Further details concerning the LON procedure are to be specified and made publicly available by the relevant Transmission System Operator (TSO) - Article 22(3) of the DCC.

 

 


 

 

 

Links

 

 

Interim Operational Notification (ION)

 

Final Operational Notification (FON)

 

Energisation Operational Notification (EON) 

 

Power-generating module document (PGMD)

 

 

Last Updated on Wednesday, 30 November 2016 21:34
 

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