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Submission of Generation Capacity (GC) and Demand Capacity (DC) for the Spring 2010
BSC Season
The next BSC Season (Spring) begins on 1 March 2010 and the deadline for submitting
GC and DC values is 15 February 2010.
How can I do this?
You can submit values using
Form 15/4.3 of BSCP15 ‘BM Unit Registration’ (300Kb)
which needs to be signed by a category A or F authorised signatory (see
BSCP38 ‘Authorisations’ (67Kb)
for information on signatories). The timetable for providing this data is captured
in
BSCP15 'BM Unit Registration' (278Kb)
and states that you need to send the Central Registration Agent
(CRA) values no less than 10 Working Days before the start of each BSC Season.
Where do I send the values?
Estimated values should be notified to the CRA by email:
NETA@IMSERV.invensys.com or by fax: 0870 833 5601, using form BSCP15/4.3.
Please ensure the values are consistent with the energy units for that column of
the form.
Even if the GC and DC values for a BM Unit are identical to those for the previous BSC
Season, you must submit the values for the new Season.
The BSC Requirements
Section K3.4.3 of the BSC (169Kb)
lists the requirements for notifying the estimated maximum positive and negative BM Unit Metered Volumes (QMij) in MWh to the CRA to enable the calculation of Generation Capacity and Demand Capacity.
When should I change the GC or DC values?
- Initially, at the time of registration;
- Seasonally, no later than 10 working days before the start of the BSC Season. Below
is a table of the BSC Seasons for 2010/11:
|
Season |
To |
From |
|
Spring |
01/03/2010 |
31/05/2010 |
|
Summer |
01/06/2010 |
31/08/2010 |
|
Autumn |
01/09/2010 |
30/11/2010 |
|
Winter |
01/12/2010 |
28/02/2011 |
- If the current Season values submitted are breached by more than the limits set
out in
Section K3.4.3 of the BSC (169Kb)
. Following a breach, Parties can re-declare upwards at any time using BSCP15/4.4.
In addition to the above, if you are a Lead Party of a Supplier BM Unit and you believe that the existing DC value will increase, you may notify the CRA of the new value for the rest of the season. This can be done up to twice in each BSC Season.
The lower and upper MW limits are derived from applying the percentage limit to
the minimum and maximum capacities. The percentage threshold is 2% and applies to
BM Units between a minimum 100MW and maximum 500MW capacity.
|
Declared GC/DC |
<=100MW |
>100MW |
>500MW |
|
|
2MW Limit |
2% Limit |
10MW Limit |
This gives upper absolute limits of 2MW and 10MW respectively.
In summary, a Lead Party would be required to re-declare its GC or DC estimate within
a BSC Season if, for any Settlement Period:
a) The actual positive metered volume for any Settlement Period exceeded GC; or
b) The actual negative metered volume for any Settlement Period was less (more negative)
than DC,
by a volume of more than 2MW and more than either or both of the following:
(i) 2% of the declared capacity; and/or
(ii) 10MW.
What can be the impact of changing GC or DC?
A change of GC and or DC may result in a change to the Production/Consumption (P/C) Status of a BM Unit. If you are a Party that are in a Trading Unit with other Lead Parties, please note that any BM Unit leaving or entering the Trading Unit or a re-declaration of the GC/DC values of any of the BM Units in the Trading unit, may result in a change of P/C Status of all the BM Units within the Trading Unit.
Lead Parties should make sure that the Metered Volumes associated with such BM Units are notified from the correct account. Also, if the P/C Status of a BM Unit with a Meter Volume Reallocation Notification Agent (MVRNA) Authorisation set up changes as a result of a re-determination, the MVRNA Authorisation will be end dated automatically with an ‘Effective To Date’ of the Settlement Date before the P/C Status Change. Lead Parties will need to set up another Authorisation referencing the new Account.
Where can I get more information?
If you have any queries, please contact
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Do you have any further questions?
Please contact:
David Kemp
Business Operations Analyst
Telephone: 020 7380 4303
Email: david.kemp@elexon.co.uk
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