Emergency 24-hour
03 363 9898
or 0800 363 9898

Network load management Network load management

Information as at 20 February 2017   3:12 a.m.

Current loading and load management measurements

Orion normally controls load to keep it just below our network limit (currently 575 MW ).  We also control load for other reasons, including to avoid localised peaks, to limit our contribution to the region load on the national transmission grid, or in response to faults or emergencies.

Network load Shedding Uncontrolled load Shedable Restorable Temperature
258 MW 0 % 258 MW 37 MW 0 MW 17 °C

Pricing periods

A significant proportion of our costs are driven by the need to meet peak loading demands.  To ensure that consumers make appropriate decisions about when and where to use electricity, we signal this cost driver in our delivery charging via the use of peak periods (for general connections) and control periods (for major customer connections).  Our regular load management tends to flatten out any peaks, so we calculate “uncontrolled load” (our estimate of the loading levels that would have occurred if we had not controlled load) and use this to trigger our pricing periods.  We adjust the on and off trigger points throughout the year to focus on the periods of highest loading without exceeding our target annual duration.  The current trigger points and status of pricing periods are:

  Current
uncontrolled
On
(MW)
Off
(MW)
Group Status Current period
duration (min)
Major customer control period 258 MW 595 575 1 Off 0
      2 Off 0
General connections peak period 258 MW 590 570   Off 0
Generation period         Off 0

Note that pricing periods have minimum durations and our system has load checks to ensure stable operation of the signals – this results in delays for a pricing period to turn on or off once the trigger is reached.

Load Graphs

The following graphs show our current load and load management activities, or you can use the date selector to view graphs from previous days.
Note that the network limit (the black line) is set as a target to keep costs and prices down. The network can cope with higher loading levels, but we will then need to invest in more capacity to maintain an appropriate buffer for growth and security.
Also note that the uncontrolled load (the red line) is not the actual loading level – it’s an estimate of the loading level that would have occurred if we hadn’t tried to keep it down.

Select date to graph:
v
Limit at 03:10 
 575 MW Limit at 03:05 
 575 MW Limit at 03:00 
 575 MW Limit at 02:55 
 575 MW Limit at 02:50 
 575 MW Limit at 02:45 
 575 MW Limit at 02:40 
 575 MW Limit at 02:35 
 575 MW Limit at 02:30 
 575 MW Limit at 02:25 
 575 MW Limit at 02:20 
 575 MW Limit at 02:15 
 575 MW Limit at 02:10 
 575 MW Limit at 02:05 
 575 MW Limit at 02:00 
 575 MW Limit at 01:55 
 575 MW Limit at 01:50 
 575 MW Limit at 01:45 
 575 MW Limit at 01:40 
 575 MW Limit at 01:35 
 575 MW Limit at 01:30 
 575 MW Limit at 01:25 
 575 MW Limit at 01:20 
 575 MW Limit at 01:15 
 575 MW Limit at 01:10 
 575 MW Limit at 01:05 
 575 MW Limit at 01:00 
 575 MW Limit at 00:55 
 575 MW Limit at 00:50 
 575 MW Limit at 00:45 
 575 MW Limit at 00:40 
 575 MW Limit at 00:35 
 575 MW Limit at 00:30 
 575 MW Limit at 00:25 
 575 MW Limit at 00:20 
 575 MW Limit at 00:15 
 575 MW Limit at 00:10 
 575 MW Limit at 00:05 
 575 MW Limit at 00:00 
 575 MW Network load at 03:10 
 258 MW Network load at 03:05 
 259 MW Network load at 03:00 
 260 MW Network load at 02:55 
 261 MW Network load at 02:50 
 261 MW Network load at 02:45 
 263 MW Network load at 02:40 
 264 MW Network load at 02:35 
 265 MW Network load at 02:30 
 267 MW Network load at 02:25 
 268 MW Network load at 02:20 
 270 MW Network load at 02:15 
 270 MW Network load at 02:10 
 272 MW Network load at 02:05 
 274 MW Network load at 02:00 
 276 MW Network load at 01:55 
 279 MW Network load at 01:50 
 279 MW Network load at 01:45 
 282 MW Network load at 01:40 
 285 MW Network load at 01:35 
 287 MW Network load at 01:30 
 291 MW Network load at 01:25 
 294 MW Network load at 01:20 
 298 MW Network load at 01:15 
 302 MW Network load at 01:10 
 305 MW Network load at 01:05 
 308 MW Network load at 01:00 
 312 MW Network load at 00:55 
 316 MW Network load at 00:50 
 319 MW Network load at 00:45 
 326 MW Network load at 00:40 
 325 MW Network load at 00:35 
 320 MW Network load at 00:30 
 324 MW Network load at 00:25 
 325 MW Network load at 00:20 
 325 MW Network load at 00:15 
 325 MW Network load at 00:10 
 331 MW Network load at 00:05 
 335 MW Network load at 00:00 
 338 MW Uncontrolled load at 03:10 
 258 MW Uncontrolled load at 03:05 
 261 MW Uncontrolled load at 03:00 
 260 MW Uncontrolled load at 02:55 
 261 MW Uncontrolled load at 02:50 
 261 MW Uncontrolled load at 02:45 
 264 MW Uncontrolled load at 02:40 
 266 MW Uncontrolled load at 02:35 
 265 MW Uncontrolled load at 02:30 
 266 MW Uncontrolled load at 02:25 
 269 MW Uncontrolled load at 02:20 
 270 MW Uncontrolled load at 02:15 
 271 MW Uncontrolled load at 02:10 
 272 MW Uncontrolled load at 02:05 
 274 MW Uncontrolled load at 02:00 
 276 MW Uncontrolled load at 01:55 
 278 MW Uncontrolled load at 01:50 
 281 MW Uncontrolled load at 01:45 
 283 MW Uncontrolled load at 01:40 
 286 MW Uncontrolled load at 01:35 
 287 MW Uncontrolled load at 01:30 
 292 MW Uncontrolled load at 01:25 
 294 MW Uncontrolled load at 01:20 
 298 MW Uncontrolled load at 01:15 
 301 MW Uncontrolled load at 01:10 
 306 MW Uncontrolled load at 01:05 
 309 MW Uncontrolled load at 01:00 
 312 MW Uncontrolled load at 00:55 
 316 MW Uncontrolled load at 00:50 
 321 MW Uncontrolled load at 00:45 
 327 MW Uncontrolled load at 00:40 
 324 MW Uncontrolled load at 00:35 
 322 MW Uncontrolled load at 00:30 
 324 MW Uncontrolled load at 00:25 
 325 MW Uncontrolled load at 00:20 
 323 MW Uncontrolled load at 00:15 
 326 MW Uncontrolled load at 00:10 
 332 MW Uncontrolled load at 00:05 
 335 MW Uncontrolled load at 00:00 
 337 MW Percent shed at 03:10 
 0 % Percent shed at 03:05 
 0 % Percent shed at 03:00 
 0 % Percent shed at 02:55 
 0 % Percent shed at 02:50 
 0 % Percent shed at 02:45 
 0 % Percent shed at 02:40 
 0 % Percent shed at 02:35 
 0 % Percent shed at 02:30 
 0 % Percent shed at 02:25 
 0 % Percent shed at 02:20 
 0 % Percent shed at 02:15 
 0 % Percent shed at 02:10 
 0 % Percent shed at 02:05 
 0 % Percent shed at 02:00 
 0 % Percent shed at 01:55 
 0 % Percent shed at 01:50 
 0 % Percent shed at 01:45 
 0 % Percent shed at 01:40 
 0 % Percent shed at 01:35 
 0 % Percent shed at 01:30 
 0 % Percent shed at 01:25 
 0 % Percent shed at 01:20 
 0 % Percent shed at 01:15 
 0 % Percent shed at 01:10 
 0 % Percent shed at 01:05 
 0 % Percent shed at 01:00 
 0 % Percent shed at 00:55 
 0 % Percent shed at 00:50 
 0 % Percent shed at 00:45 
 0 % Percent shed at 00:40 
 0 % Percent shed at 00:35 
 0 % Percent shed at 00:30 
 0 % Percent shed at 00:25 
 0 % Percent shed at 00:20 
 0 % Percent shed at 00:15 
 0 % Percent shed at 00:10 
 0 % Percent shed at 00:05 
 0 % Temperature at 03:10 
 17 °C Temperature at 03:05 
 17 °C Temperature at 03:00 
 17 °C Temperature at 02:55 
 17 °C Temperature at 02:50 
 17 °C Temperature at 02:45 
 17 °C Temperature at 02:40 
 17 °C Temperature at 02:35 
 17 °C Temperature at 02:30 
 17 °C Temperature at 02:25 
 17 °C Temperature at 02:20 
 17 °C Temperature at 02:15 
 17 °C Temperature at 02:10 
 17 °C Temperature at 02:05 
 17 °C Temperature at 02:00 
 17 °C Temperature at 01:55 
 17 °C Temperature at 01:50 
 17 °C Temperature at 01:45 
 17 °C Temperature at 01:40 
 17 °C Temperature at 01:35 
 17 °C Temperature at 01:30 
 17 °C Temperature at 01:25 
 17 °C Temperature at 01:20 
 17 °C Temperature at 01:15 
 17 °C Temperature at 01:10 
 17 °C Temperature at 01:05 
 17 °C Temperature at 01:00 
 17 °C Temperature at 00:55 
 17 °C Temperature at 00:50 
 17 °C Temperature at 00:45 
 17 °C Temperature at 00:40 
 17 °C Temperature at 00:35 
 17 °C Temperature at 00:30 
 17 °C Temperature at 00:25 
 17 °C Temperature at 00:20 
 17 °C Temperature at 00:15 
 17 °C Temperature at 00:10 
 17 °C Temperature at 00:05 
 17 °C Temperature at 00:00 
 17 °C USI load at 03:10 
 601 MW USI load at 03:05 
 604 MW USI load at 03:00 
 605 MW USI load at 02:55 
 604 MW USI load at 02:50 
 605 MW USI load at 02:45 
 607 MW USI load at 02:40 
 610 MW USI load at 02:35 
 611 MW USI load at 02:30 
 612 MW USI load at 02:25 
 616 MW USI load at 02:20 
 619 MW USI load at 02:15 
 620 MW USI load at 02:10 
 618 MW USI load at 02:05 
 621 MW USI load at 02:00 
 624 MW USI load at 01:55 
 627 MW USI load at 01:50 
 628 MW USI load at 01:45 
 632 MW USI load at 01:40 
 637 MW USI load at 01:35 
 640 MW USI load at 01:30 
 644 MW USI load at 01:25 
 647 MW USI load at 01:20 
 652 MW USI load at 01:15 
 657 MW USI load at 01:10 
 663 MW USI load at 01:05 
 667 MW USI load at 01:00 
 668 MW USI load at 00:55 
 674 MW USI load at 00:50 
 681 MW USI load at 00:45 
 690 MW USI load at 00:40 
 686 MW USI load at 00:35 
 690 MW USI load at 00:30 
 693 MW USI load at 00:25 
 696 MW USI load at 00:20 
 701 MW USI load at 00:15 
 702 MW USI load at 00:10 
 708 MW USI load at 00:05 
 715 MW USI load at 00:00 
 719 MW Network load at 03:10 
 258 MW Network load at 03:05 
 259 MW Network load at 03:00 
 260 MW Network load at 02:55 
 261 MW Network load at 02:50 
 261 MW Network load at 02:45 
 263 MW Network load at 02:40 
 264 MW Network load at 02:35 
 265 MW Network load at 02:30 
 267 MW Network load at 02:25 
 268 MW Network load at 02:20 
 270 MW Network load at 02:15 
 270 MW Network load at 02:10 
 272 MW Network load at 02:05 
 274 MW Network load at 02:00 
 276 MW Network load at 01:55 
 279 MW Network load at 01:50 
 279 MW Network load at 01:45 
 282 MW Network load at 01:40 
 285 MW Network load at 01:35 
 287 MW Network load at 01:30 
 291 MW Network load at 01:25 
 294 MW Network load at 01:20 
 298 MW Network load at 01:15 
 302 MW Network load at 01:10 
 305 MW Network load at 01:05 
 308 MW Network load at 01:00 
 312 MW Network load at 00:55 
 316 MW Network load at 00:50 
 319 MW Network load at 00:45 
 326 MW Network load at 00:40 
 325 MW Network load at 00:35 
 320 MW Network load at 00:30 
 324 MW Network load at 00:25 
 325 MW Network load at 00:20 
 325 MW Network load at 00:15 
 325 MW Network load at 00:10 
 331 MW Network load at 00:05 
 335 MW Network load at 00:00 
 338 MW

Water heating (residential)

Our load management primarily focuses on storage water heating, where supply can be interrupted for a period of time without affecting the availability of hot water.  Our control simply delays the heating of water cylinders until the peak load or network constraint has passed.  To ensure that customers are not adversely affected by our load management activities, we agree a set of long term service level targets with electricity retailers.  We then aim to limit load (and therefore delivery costs and charges) to the maximum extent possible without breaching these agreed service level targets - this is a challenging cost/quality trade-off to achieve, and we actively report on our results.

The following tables show the extent of shedding for residential and business customers with water heating linked to an ‘economy’ or ‘composite’ electricity option. Customers with night option or night with an afternoon boost are not affected by this load control. Numbers in the table are in hours and minutes.

Residential load management channels
Service level target: No more than 4 hours off in any 8 hour period
Performance: Average duration
(hours off)
Longest duration
(hours off)
In the last 8 hours (see graph) 0:00 0:00
In any 8 hour period today 0:00 0:00
In any 8 hour period yesterday 0:00 0:00

The following spreadsheet shows a history of residential water heating service performance:

Residential water heating service performance history (xslx)

Percent shed at 03:10 
 0 % Percent shed at 03:05 
 0 % Percent shed at 03:00 
 0 % Percent shed at 02:55 
 0 % Percent shed at 02:50 
 0 % Percent shed at 02:45 
 0 % Percent shed at 02:40 
 0 % Percent shed at 02:35 
 0 % Percent shed at 02:30 
 0 % Percent shed at 02:25 
 0 % Percent shed at 02:20 
 0 % Percent shed at 02:15 
 0 % Percent shed at 02:10 
 0 % Percent shed at 02:05 
 0 % Percent shed at 02:00 
 0 % Percent shed at 01:55 
 0 % Percent shed at 01:50 
 0 % Percent shed at 01:45 
 0 % Percent shed at 01:40 
 0 % Percent shed at 01:35 
 0 % Percent shed at 01:30 
 0 % Percent shed at 01:25 
 0 % Percent shed at 01:20 
 0 % Percent shed at 01:15 
 0 % Percent shed at 01:10 
 0 % Percent shed at 01:05 
 0 % Percent shed at 01:00 
 0 % Percent shed at 00:55 
 0 % Percent shed at 00:50 
 0 % Percent shed at 00:45 
 0 % Percent shed at 00:40 
 0 % Percent shed at 00:35 
 0 % Percent shed at 00:30 
 0 % Percent shed at 00:25 
 0 % Percent shed at 00:20 
 0 % Percent shed at 00:15 
 0 % Percent shed at 00:10 
 0 %

Water heating Business

Business load management channels
Service level target: No more than 2 hours off in any 5 hour period
Performance: Average duration
(hours off)
Longest duration
(hours off)
In the last 5 hours (see graph) 0:00 0:00
In any 5 hour period today 0:00 0:00
In any 5 hour period yesterday 0:00 0:00

Percent shed at 03:10 
 0 % Percent shed at 03:05 
 0 % Percent shed at 03:00 
 0 % Percent shed at 02:55 
 0 % Percent shed at 02:50 
 0 % Percent shed at 02:45 
 0 % Percent shed at 02:40 
 0 % Percent shed at 02:35 
 0 % Percent shed at 02:30 
 0 % Percent shed at 02:25 
 0 % Percent shed at 02:20 
 0 % Percent shed at 02:15 
 0 % Percent shed at 02:10 
 0 % Percent shed at 02:05 
 0 % Percent shed at 02:00 
 0 % Percent shed at 01:55 
 0 % Percent shed at 01:50 
 0 % Percent shed at 01:45 
 0 % Percent shed at 01:40 
 0 % Percent shed at 01:35 
 0 % Percent shed at 01:30 
 0 % Percent shed at 01:25 
 0 % Percent shed at 01:20 
 0 % Percent shed at 01:15 
 0 % Percent shed at 01:10 
 0 % Percent shed at 01:05 
 0 % Percent shed at 01:00 
 0 % Percent shed at 00:55 
 0 % Percent shed at 00:50 
 0 % Percent shed at 00:45 
 0 % Percent shed at 00:40 
 0 % Percent shed at 00:35 
 0 % Percent shed at 00:30 
 0 % Percent shed at 00:25 
 0 % Percent shed at 00:20 
 0 % Percent shed at 00:15 
 0 % Percent shed at 00:10 
 0 %

Pricing periods history

The following spreadsheets provide a history of our pricing periods:

General Connection Peak period (xlsx)
  The last peak period occurred on 24/08/2016 from 17:26 to 19:11.

Major customer control period Group 1 (xlsx)
  The last group 1 control period occurred on 24/08/2016 from 17:51 to 18:54.

Major customer control period Group 2 (xlsx)
  The last group 2 control period occurred on 24/08/2016 from 17:51 to 18:55.

Generation period (xlsx)
  The last generation period occurred on 08/09/2016 from 10:32 to 15:05.


Disclaimer

Orion injects ripple signals into its network to identify its pricing periods (peak periods, control periods and generation periods) which are used to establish charges for delivery and credits for export and generation. The records of these pricing periods, as listed in the linked spreadsheets, are verified at the end of each season.

Orion also provides email and text messages to notify pricing periods and a range of other information which is displayed on the dashboard web page. These additional messages and information are provided to assist customers and retailers, but their accuracy and availability is not guaranteed. In our experience, email and text messages are occasionally delayed or lost and, from time to time, the information on this web page may not be available or may be incorrect. We do not accept liability for any direct or indirect loss or damage that may be suffered as a result of using this additional information.

Please email us if you find any errors on this page or have any comments or suggestions for improvements.