energy - generation

Genstar4 Electronic Dispatch and Logging (EDL)

The Electronic Dispatch and Logging (EDL) module interfaces to National Grid (NG) for the exchange of information in near-to real-time as stipulated in the Grid Code.

The EDL module manages communication with the NG EDL messaging interface that is installed at each station or wind farm control point. This module provides access to the NG messaging system, so it allows the Station Operators to submit operational dynamic parameters for the generation assets to NG, and to receive dispatch instructions for Bid-Offer Acceptances and other Ancillary Services. This enables the Station Operators to respond to instructions to change output levels in real-time.

The EDL module supports the following activities:

  • Sending changes in operational plant dynamic data to NG
  • Receiving Bid and Offer Acceptances (BOAs) from NG
  • Receiving Ancillary Service Instructions from NG
  • Maintaining Logs of Submissions, BOAs and Ancillary Instructions

EDL Communication with NG

The EDL module supports the user at the station Control Centre for accepting NG instructions for Balancing and Ancillary Service dispatch, and for creating operational data submissions. The following functionality is provided

  • A visual indicator shows the connection status between the station Control Centre and NG, with alerts for loss and restoration of connectivity.
  • An Instruction display screen shows the most recent history of Balancing and Ancillary Service Instructions. The display may be filtered to select a specific BM unit, and/or a specific data submission type. Additional screens are available to display the logs of historic instructions.
  • A prioritized display of a ‘New Instruction’ alert window displays the Instruction details whenever a new Instruction is received. If the Instruction represents an acceptance of a balancing bid, a graphical plot of the Instruction and a calculation of the volume and cash value is provided. A graph shows the impact on the scheduled target level. The user can acknowledge, then accept or reject the Instruction. A ‘timeout’ display indicates the amount of time remaining for the user to respond to NG.
  • If connection with NG is lost, the Instruction screen allows the user to capture telephoned instructions through input dialogues.
  • If there is a change to the value of a BM Unit operational parameter, the user at the Control Centre can submit the new value immediately to NG. The new data is validated according to the market rules to ensure compliance before submission. A confirmation message is displayed when NG receives the submission.
  • A Submission display screen shows the recent history of operational plant data notified to NG, including the current value of each submission data type. The display may be filtered to show a specific BM unit, and/or a specific data submission type. The submission data types are: Maximum Export or Import Limit, Stable (Minimum) Export/Import Limit, Minimum On and Off Times, Notice to Deviate from Zero (Start), Notice to Deliver Bids/Offers, Run Up and Run Down Rates for Import/Export. An additional screen is available to display the logs of historic submissions.

A single screen collating all data for rapid emergency submission to NG can be added as an option.

N.B. Where communications with NG are not time-critical, e.g. for submission of planned unit technical parameters, the compilation and submission of data via EDT (Electronic Data Transfer) will be managed through the Genstar4 Power Scheduler module.

Control Room Configuration

The Grid Code requires that each station has a designated control point, at which NG will commission a network line and router, and supply an EDL communication protocol stack (“CTC message client”) for installation on a PC which requires a dedicated network card for the EDL link. The Genstar4 EDL module interfaces to this client to send and receive information for the BM Units which are controlled from that pointing addition, the EDL module manages fully flexible arrangement of BM Units into multiple control-desk configurations, which may be designated as active (controlling) or passive (notification only); and are deployed on other PCs either within the station LAN or across a corporate network, for example at an energy management centre.

Genstar4 also provides full support for dispatching power stations via EDT.

To learn more about power station dispatch in the UK visit the EDL and EDT pages or Contact Dunstan Thomas for a product demonstration of Genstar4.

Click here to request a call back or telephone 02392 822 254

T: 023 9282 2254