ENTSOG Implementation and Monitoring Report 2017 - Balancing Network Code

25%

20%

Max

15%

On 10% of the days when any shipper imbalances occur, the net volume of shipper imbalances relative to the market entry volume of a balancing zone (BAL.4) has a range between +5% and max.+15%. This means that the market is LONG (+) at the end of the days within a range of 10%.

10%

On 80% of the days when any shipper imbalances occur, the net volume of shipper imbalances relative to the market entry volume of a balancing zone (BAL.4) has a range between −5% and +5%. This means that the market is sometimes LONG (+) well as sometimes SHORT (−)at the end of the days within a range of 10%.

5%

0%

– 5%

On 10% of the days when any shipper imbalances occur, the net volume of shipper imbalances relative to the market entry volume of a balancing zone (BAL.4) has a range between −5% and min. −15%. This means that the market is SHORT (−) at the end of the days within a range of 10%.

– 10%

– 15%

Min

– 20%

Balancing zone (no. of days with TSO bal.action)

Map 6:   Example with explanation of the daily BAL.4 indicator in % on days with shipper imbalance volumes in GY 2016/2017

25%

The relationship between BAL.4 and BAL.3 is illustrated in Map 7 below. If BAL.4 is positive, it means that the market is LONG (+), so there is too much gas at the end of the day in the market. In this case the TSO needs to provide the gas by e. g. selling gas to the rest of the market in order to keep the system balanced (positive BAL.3). If BAL.4 is negative, it means that the market is SHORT (−), so there is not enough gas at the end of the days in the market. In this case the TSO needs e.g. to buy gas from the rest of the market in order to keep the system balanced (negative BAL.3).

20%

15%

BAL.3 (+) = TSO SELL to the market

BAL.4 (+) = LONG market

10%

5%

0%

– 5%

BAL.3 (−) = TSO BUY from the market

BAL.4 (−) = SHORT market

– 10%

– 15%

– 20%

Map 7:   Relationship between daily BAL.4 vs. BAL.3 indicator

Image courtesy of REN

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ENTSOG BAL NC Implementation and Effect Monitoring Report 2017