ELEXON Circulars

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(Showing items 1-10 of 355)

EL02144: Withdrawal from the Balancing and Settlement Code – Npower Cogen Trading Ltd (Party ID: COGTRA01) [109.9 Kb] Issue Date: 21 October 2014

This is a notification that Npower Cogen Trading Ltd will withdraw from the Balancing and Settlement Code (BSC) on 22 October 2014, in accordance with section A5.1 of the Code.

EL02143: Security upgrade: SSL POODLE vulnerability [111.1 Kb] Issue Date: 21 October 2014

We have recently become aware of a new Secure Sockets Layer (SSL)  bug referred to as ‘Padding Oracle On Downgraded Legacy Encryption’ or ‘POODLE’ which can involve a ‘man in the middle attack’ allowing someone to exploit the vulnerability to get access to data.

EL02142: Planned National Grid BSAD Outage: Wednesday 29 October 2014 [111.2 Kb] Issue Date: 20 October 2014

We have been notified by National Grid that there will be planned downtime between 13.00 (GMT) and 15.30 (GMT) on Wednesday 29 October 2014 which will affect submission of Balancing Services Adjustment Data (BSAD) to the BSC Central Services. Please note that these times are approximate and ELEXON will send out further communication to notify Parties when work has been completed.

EL02141: Treatment of Volume Notification on the ‘Long’ Clock Change Day: Sunday 26 October 2014 [113.4 Kb] Issue Date: 16 October 2014

UK time changes on 26 October 2014 from British Summer Time (BST) to Greenwich Mean Time (GMT)/ Coordinated Universal Time (UTC) at 02.00 (BST). This will result in a ‘long’ day as the clocks ‘go back’ an hour.

EL02140: Inaccurate Transmission Loss Multipliers for Settlement dates between 13–25 September 2014 [109.6 Kb] Issue Date: 10 October 2014

Inaccurate Transmission Loss Multipliers, reflecting low and negative transmission losses, appear for 13 Settlement dates from 13 to 25 September 2014.

EL02139: Intermittent TIBCO disconnects on the High Grade Communications Network - Resolved [106.0 Kb] Issue Date: 7 October 2014

Following on from ELEXON Circular EL02138 we have continued to monitor the High Grade Communications Network over the last 24 hours and have seen no further interruptions to the TIBCO feed during this time. We therefore consider this issue to be resolved.

EL02138: Intermittent TIBCO disconnects on the High Grade Communications Network - Update [107.7 Kb] Issue Date: 6 October 2014

Following on from ELEXON Circular EL02137 we have continued to monitor the High Grade Communications Network over the weekend and have seen no further interruptions to the TIBCO feed during this time.

EL02137: Intermittent TIBCO disconnects on the High Grade Communications Network [106.7 Kb] Issue Date: 3 October 2014

We have been experiencing momentary interruptions on the High Grade Communications Network.

EL02136: System Prices without Buy Price Adjuster (BPA) [114.5 Kb] Issue Date: 30 September 2014

Between 20 and 29 September 2014, there was an issue with the Buy Price Adjuster (BPA) values provided by National Grid. The NETBSAD data for this period was incorrectly stated as zero.
National Grid has confirmed that this issue has been resolved and correct files are now being sent.

EL02135: Defaulting of Radio Teleswitch files for 27 and 28 September 2014 [29.9 Kb] Issue Date: 29 September 2014

The data files received from the Teleswitch Agent for 27 and 28 September 2014 contained a number of anomalies for the Southern region. Consequently, we have directed the Supplier Volume Allocation Agent to default to the equivalent files for the previous weekend of 20 and 21 September. Further information is contained within the Circular.