| Imbalance Price (Electricity Balancing Market) |
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According to Article 2(12) of the Commission Regulation (EU) 2017/2195 of 23 November 2017 establishing a guideline on electricity balancing, imbalance price is the price, be it positive, zero or negative, in each imbalance settlement period for an imbalance in each direction.
The same definition of the imbalance price is used by the the so-called 'Winter Energy Package (Article 2(2)(o) of the Proposal for a Regulation of the European Parliament and of the Council on the internal market for electricity (recast), 30.11.2016, COM(2016) 861 final 2016/0379 (COD)).
Imbalance prices are determined at the imbalance price area level.
Implementation of the pay-as-cleared method to price balancing energy is envisioned, and the marginal pricing has been chosen as the preferred methodology, unless a different pricing method is proven to be more efficient in the long run.
An imbalance price will be calculated for each direction, these prices may however be the same, thus allowing the possibility of both single pricing and dual pricing (the choice of which is correlated to the length of the imbalance settlement period).
After real-time, the TSO charges or pays market participants depending on if they are short (have a shortage of supply vis-à-vis their nomination) or long (have a surplus), respectively. This payment or charge also depends on whether the entire system as a whole is long or short. These payments or charges are known as imbalance settlement prices and are allocated after real-time during the settlement process. Finally, the payments and charges are based on underlying balancing market prices, which in turn provide market participants that bear balancing responsibility with the incentive to have their demand and supply in balance so that overall deviations of the system are minimized. For the TSO this process should be a 'zero-sum' game where he has no financial interest and bears no financial risk.
In order to disincentivise aggravation of the system imbalance, the imbalance price for imbalances aggravating system imbalances should at least be related to the average price of balancing energy activated within the area.
Pursuant to Article 55 of the said Commission Regulation 2017/2195 each Transmission System Operator (TSO) defines rules to calculate the imbalance price to be paid by the balance responsible party (BRP) to the TSO or received by BRP from the TSO.
The rules include a definition of the value of avoided activation of balancing energy from frequency restoration reserves (FRR) or replacement reserves (RR).
Each TSO determines the imbalance price: (a) for each imbalance settlement period; (b) for each imbalance price area; and (c) for each imbalance direction.
The imbalance price for shortage must not be less than:
(a) the weighted average price for activated positive balancing energy for FRRs and RRs; or
(b) in the event that no activation of balancing energy in either direction has occurred during the imbalance settlement period, the value of the avoided activation of balancing energy for FRRs or RRs.
The imbalance price for surplus must not be greater than:
(a) the weighted average price for activated negative balancing energy for FRRs and RRs; or
(b) in the event that no activation of balancing energy in either direction has occurred during the imbalance settlement period, the value of the avoided activation of balancing energy for FRRs or RRs.
Imbalance settlement price, in the event that both positive and negative balancing energy for FRRs or RRs have been activated during the same imbalance settlement period, will be determined for shortage and surplus based on at least one of the principles stated above.
Commission Regulation (EU) 2017/2195 of 23 November 2017 establishing a guideline on electricity balancing
Article 55 Imbalance price
1. Each TSO shall set up rules to calculate the imbalance price, which can be positive, zero or negative, as defined in Table 2:
Table 2 Payment for imbalance
2. The rules pursuant to paragraph 1 shall include a definition of the value of avoided activation of balancing energy from frequency restoration reserves or replacement reserves.
The aforementioned Proposal for a Regulation of the European Parliament and of the Council on the internal market for electricity (recast), 30.11.2016, COM(2016) 861 final 2016/0379 (COD) stipulates that:
- the imbalances must be settled at a price that reflects the real time value of energy (Article 5(6)),
- TSOs are required to publish close to real-time information on the imbalance price (as well as on the balancing energy price and on the current balancing state of TSO's control areas - Article 5(1).
Dual/single imbalance pricing
The Agency for the Cooperation of Energy Regulators (ACER) in its Recommendation No 03/2015 of 20 July 2015 on the Network Code on Electricity Balancing proposed that the single price for a positive and negative imbalances should be implemented, with the possibility to use a dual price when a TSO provides the justification that it meets the criteria envisaged in the proposal for harmonisation of imbalance settlement.
All TSOs’ proposal of 16 July 2018 to further specify and harmonise imbalance settlement (draft version for public consultation) proposed the following definitions of dual/single imbalance pricing:
(a) 'dual imbalance pricing' means that, for a given ISP in a given imbalance price area, the price for negative imbalance is not equal to the price for positive imbalance in sign and/or size,
(b) 'single imbalance pricing' means that, for a given ISP in a given imbalance price area, the price for negative imbalance and the price for positive imbalance are equal in sign and size.
Electricity Balancing Network Code (Commission Regulation (EU) 2017/2195 of 23 November 2017 establishing a guideline on electricity balancing), Article 2(12), Article 55
ENTSO-E Network Code on Electricity Balancing, A EURELECTRIC comments paper, August 2013, p. 1
Recommendation No 03/2015 of 20 July 2015 on the Network Code on Electricity Balancing
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| Last Updated on Saturday, 01 September 2018 12:19 |
