Frequently Asked Questions

Details: Last Updated on Wednesday, 27 February 2013 14:43

When will we receive the CAI for the Y 2010 auctions?

By August 15, all local AOs shall assign CAIs to capacities allocated in Y and M auctions, if not already assigned. If the capacity shall not be traded on secondary basis, the same CAI appears once again in the LT CRD generated in D-2 12:00.

CAIs from individual local AOs shall/were distributed in the following way:

Etrace: generated backwardly for all past auctions, available for downloading after August 15 and distributed in D-2 at 12:00. This document explains how the CAIs for already allocated capacities will be generated and how the CAIs will be made available for traders. This document was published two days ago on CAO website.
Austria AO: already distributed within the results of Y and M auctions
Mavir: CAIs for Y and M auctions were already assigned. Data are available in the KAPAR system
ELES: all LT CAIs are visible in ELES scheduling system, including results of the secondary market.
HU/AT border: with start of new scheduling only one CAI for nomination on this border will be required.

No changes are planned for the Allocation Results Documents, which means these documents will remain unchanged.

When will we receive static CAIs for those borders not having congestion management procedures in place?

DE/AT border: No static CAI’s will be assigned for this border. The nomination must be done with Bussines Type A06.

CZ/SK border: two options are possible, one without static CAI, second with it. The final decision will be published on SEPS website till 5.8.

In which file (format, when, ..) we will receive the CAIs from 01.09.2010 especially with respect to the daily auction as many companies use automatic upload and do not want to put daily the CAis manually into their trading and scheduling systems ?

After new scheduling is introduced each local auction office shall issue CAIs within the Capacity Rights Document (CRD). Long Term CRDs shall be distributed to trading companies after closure of the secondary market. This document includes CAIs for capacities allocated in Y and M auctions as well as all changes that were subject to the trade on secondary market. Daily CAIs shall be distributed within short-term CRD. The formats of ST CRDs are published on CAO website; however the only difference with LT CRD is the Capacity Contract Type (CCT) parameter which is A01 for capacities allocated in daily auction. It needs to be pointed out that ST and LT CRDs are different documents and ST document does not include LT capacity rights.

No changes are planned for the Allocation Results Documents, which means these documents will remain unchanged.

What is the purpose of the second Dry-Run?

The purpose of the second Dry-Run is to continue to give the energy market participants the opportunity to get accustomed to the ECAMT e-Portal and the procedure of longterm and daily auctions.

The market has now the possibility to test the processes that where discussed on the FBA Capacity Allocation Workshop on the 27th of October in Munich, notably the FBA capacity calculation process and the auction algorithm.

Also the newly introduced ČEPS – SEPS market area and the improvements of the ECAMT ePortal, some of which were requested by Traders side after the last Dry-Run, can be experienced in the second Dry-Run.

What Capacity is being offered in the second Dry-Run to simulate the real allocation process?

The calculations of the technical parameters of capacities used in the External Dry Run II are based on the same input data used for Dry Run I. However the technical parameters are reflecting the newly introduced "Czech Republic + Slovakia" market area.

This gives you the opportunity to analyse the results from Dry Run I and to compare them with the results from Dry Run II; especially under consideration of the new market area.

Also market participants who were not able to participate in the first dry run are now able to experience the same situation as in the first round for experimenting with the new FBA approach of allocation.

Can the capacities awarded in both Dry-Runs be regarded as an estimate of the allocated capacity in the real operation?

No, any comparison between allocated capacity in the dry run and allocated capacity in the real operation should not be interpreted as a realistic estimate of future real outcome of the FBA.

How do I gain access to the auction platform?

Download the registration form at our homepage at "Project - Dry Run" and send the filled in form to helpdesk[at]central-ao.com

Does CAO already have a valid EIC code?

We do have an EIC code, which is: 11XCENTRAL-AO--X

What does "TL" mean in the TPA file?

Abbreviation "TL" was used incorrectly in first phase of the dry run; it should read TMF (total maximum flow)

What is the explanation for "n-00" and "n-001" in PTDF matrix?

Critical network element/critical branch (i.e. transmission line or transformer) is defined by TSOs by their previous experiences. Once a network element has been assigned as a critical network element, corresponding property such as AMF will be calculated in order to evaluate how this critical branch could affect the congestion of the network during the allocation process. n-0 is the base case where there is no critical outage is considered, n-1 is that one critical outage is considered with combination of this critical branch and new AMF+ and AMF- will be calculated accordingly. n-2 could also be possible in PTDF matrix. n-2 would be the case, where two critical outages occur simultaneously and influence the critical branch.

Which cases do impact the PTDF matrix and allocation?

All cases (combinations of critical branch and critical outage) in the PTDF matrix are relevant for the auction. Distribution of the flow over the critical branches and also AMF (Available Maximum Flow) are different depending on the kind of outage, therefore all cases have to be considered.

What is the AMF (Available Maximum Flow) correspondence to each critical branch and critical outage?

The flow limits themselves are expressed by AMFs on critical network element (critical branch) in combination with critical outage on both directions (AMF+ and AMF-). This is a share of the maximum flow that a line/transformer can transmit, because a certain share is used up by domestic load coverage, uncontrollable external influences, modelling inaccuracies etc., such that only the remainder is available for use by cross-border exchanges.

Is it possible to publish the AMFs for the borders /sum of interconnectors between two countries?

This is not possible as AMF's are influenced by all combinations of critical branch and critical outages.

Why does the Auction price not respect the formula MCP=0 if RC<=AC?

The formula MCP=0 if RC<=AC is no longer valid in the flow-based allocation as each accepted bid of any source sink pair contributes to the loading of critical branches.

*RC→ requested capacity, AC→ Awarded capacity, MCP→ Auction price (market clearing price)

Why is there an auction price when no capacity was awarded for this specific source sink pair and product? / Why is the auction price higher than the requested price for a specific source sink combination?

All bids at all source-sink pairs compete with each other and affect all critical branch and critical outage combinations according to the PTDF matrix (Physical Transmission Distribution Factor - matrix). After the grid has been congested, no bid could be accepted, and the auction price for each source sink pair will be calculated based on shadow prices.

When will CAO publish the auction rules and technical enquiries?

We will approximately publish the Auction Rules and technical requirements by the end of December 2009/ beginning of January 2010.

Why can bids be excluded from an auction when they all got a time stamp and are visible in the published requested bids?

In case of a daily auction it could also be a reason of insufficient unutilized credit limit (UCL).

What is the meaning of "only positive PTDF Factors" (Physical Transmission Distribution Factors) are taken into account"? / Are negative coefficients considered in the PTDF (Physical Transmission Distribution Factors) matrix?

In explicit auctions the "right to use the capacity" is allocated, therefore no counter-flows could be taken into account while evaluating the constraints of AMF. In principle it means each direction on individual critical branch is evaluated separately, i.e. AMF+ is compared with physical flows resulting from positive PTDFs and AMF- is compared with physical flows resulting from negative PTDFs.

Is it the sum of the shadow price for each couple (line, case) or only on the base case (n-0)?

The Auction Price is calculated according to equation. AP(x,y)= Σ(k) PTDF(x,y,k)*SP(k). Therefore not only the base case is considered, but all the possible scenarios and export/import limits.

*x→ source, y→ sink, k→ critical network element (critical branch) and critical outage combination, SP→ Shadow price, AP→ Auction price

The PTDF matrix refers to a control area "DE_AT" while the German and Austrian control areas do not appear. Can we consider that any bidding from one of the German and Austrian areas will impact the considered line similarly?

The commercial flow from German and Austrian control areas (represented by bids or allocated PRTs) is considered to have the same impact to assessed lines. This approach is based on the fact that Germany and Austria constitute one "market area", where the exchange is not limited and therefore the source of the delivery could be in any control area of this market area.

The AMF+ (Available Maximum Flow) and AMF- are provided for each couple (line, case) while the impact of each commercial flow for the couple can be positive and negative. How do we need to take that into account in the algorithm?

Each commercial flow could cause positive or negative physical flow, in meaning they could cause physical flow in one or the other direction on evaluated critical branch (under conditions of critical outage). This is represented by a positive or negative PTDF value.

∑(x,y∈Z) {Max[0,PTDF(x,y,l) ]×∑(b(x,y)∈B) [v_acc (b(x,y) ) ] }≤AMF+ (l) ∀l∈L ;

∑(x,y∈Z) {-Min[0,PTDF(x,y,l) ]×∑(b(x,y)∈B) [v_acc (b(x,y) ) ] }≤AMF- (l) ∀l∈L

In some cases I can see that market participants have requested capacity but no capacity was awarded. Does it mean that no capacity was available?

Is it possible to see capacity for specific borders in the "technical parameters" file?

This is not possible as AMF's are influenced by all combinations of critical branch and critical outages.

How will the "reliability margin" be defined? Is it a TSO's decision?

The reliability margins are currently defined by the TSOs. However in future this will be CAO's responsibility. Reliability margins are calculated according to the harmonized process.

Is the bid price the maximum price? Is the bid price decreased by the real flow?

The bid price is the maximum price the trader is willing to pay for the capacity. If the Auction Price is higher than bid price, the bid is rejected. The bid price is the maximum price to be paid by the trader in case the bid gets awarded.

Where can I find the manual with the description of the capacity allocation method?

The Capacity allocation method was presented during the 2nd workshop and will be again subject to the presentation during the workshop on 27th October. The presentations are published on CAO's web page.

Why is the system taking over the time stamp of the last change for all bids even though only new bids have been added?

This will be corrected, the time stamp will only be updated for the respective, changed or added bids, and the unchanged bids will keep the original time stamp

Where can I monitor and verify my entered bids?

In "Auction Details" click the "Bid" Button to monitor, enter or change bids.

What is the minimum volume of bids? Can I enter space rows i.e. if I use 24h block uploads?

The minimum value of "1" MW always needs to be respected, also by using block uploads.

No, you can delete bids also before saving them: Check/mark them in the "delete" box and when you save the bids the one's you check marked will be deleted.

Do I have to save bids first before I can delete specific ones?

No, you can delete bids also before saving them: Check/mark them in the "delete" box and when you save the bids the one's you check marked will be deleted.

What does VET, DE_AT, ENE_ APG stand for?

"ENE" is the shortage for "transpower stromuebertraguns gmbh", which will be changed to TPS, "APG" is the shortage for "Verbund Austrian Power Grid", while "VET" stands for Vattenfall Europe Tranmission

Will the names of the source and sink zones remain in the real operation?

The names of the source / sink pairs will be the same in real operation except TSO ENE will be replaced by the name of TPS.

Will the day saving times (23 h/25h) be considered in the system or will always be a 24h product?

Daylight saving time changes will be considered by either 23 or 25h.

What is the difference in the menu between "Secondary market" and " Capacity Management"?

"Capacity Management" with "List PTR" in gives you an overview of your awarded PTRs and allows you to split, transfer and resale them. In "Secondary Market", via "Transfer- Resale list" you can monitor the transfer and resale.

What do the values of the Technical Parameters mean?

Technical Parameters do represent the PTDF matrix (Physical Transfer Distribution Factors-matrix) and AMFs (Available Maximum Flows) of the power grid.

The elements of the PTDF matrix represent the influence of cross-border exchange programmes between each pair of market areas (in both directions) on power flows on the considered combinations of critical network elements (critical branch) and critical outages.

AMF value for each critical branch and critical outage combination (including base case) represent the maximum flow under current grid status and it is calculated based on TMF (total maximum flow) which is also published within the technical parameter file.

How can I filter the auction results for one commercial profile?

We are currently working on the implementation of Filter Functions. For the time being you might want to copy and paste the results into Excel to filter them.

Why is the auction price i.e. "0.04 EUR/MWh", when the first rejected bid was "0.03 EUR/MWh?

The Auction Price is between the last accepted and first rejected, depending on the source/sink pair. The calculation of the Auction price is more described in the presentation of the 2'nd workshop and will be again subject to the presentation during the workshop on 27th October.

Where can I find more information about the electronic certificates to access CAO's system?

The electronic certificate is not required for the Dry Run. We are evaluating electronic certificate supplying companies that meet the expected quality standards and will publish the information on our homepage.

Is there a minimum EUR value to be entered when bidding?

The minimum entry for price is 0.00 EUR/MWh.

It was announced that CZ and SK will be treated the same as DE and AT. Why is this not regarded in the PTDF matrix of the dry run, where the area DE_AT exists, but CZ and SK are separate areas? When will CAO adapt this?

CZ and SK will be treated the same as DE and AT. CAO will consider this during next Dry-run phase.

Where can I find export limit in ECAMT system?

In ECAMT system, you have the possibility to see the export limit when you are in "Detail" panel of an auction.

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