System Average Interruption Duration Index
The System Average Interruption Duration Index (SAIDI) is used as an indicator for the reliability of energy networks. SAIDI is the average downtime per consumer supplied and is calculated as follows:
It is the number of the interruption affected consumers in an area (district, city, ...), the duration of the interruption , the total number of consumers and the number of interruptions.
SAIDI is measured in units of time, usually minutes or hours. An annual value is usually determined. According to IEEE Standard 1366-1998, the mean value for North America is approximately 1.5 hours.
In Germany, the electricity and gas network operators submit an annual report to the Federal Network Agency in accordance with Section 52 of the Energy Industry Act (EnWG) on the supply interruptions that have occurred in their network. The Federal Network Agency determines the SAIDI value from these reports. In the electricity sector, the German SAIDI value in 2016 was 12.8 minutes / year (of which 2.1 minutes / year in low voltage and 10.7 minutes / year in medium voltage ). In 2006 the German SAIDI value was still 21.53 minutes. In the gas sector, the German SAIDI value in 2016 was 1.03 minutes / year (0.84 minutes / year in the low pressure range, 0.19 minutes / year in the medium pressure range and 0.01 minutes / year in the high pressure range). In 2006 the SAIDI value was 2.09 minutes / year.
Influencing variables
The calculation of the SAIDI value only includes unplanned interruptions that can be traced back to atmospheric influences, the effects of third parties, the responsibility of the network operator and retroactive disturbances from other networks. Interruptions planned by the network operator, interruptions due to force majeure, such as natural disasters, and interruptions that do not last longer than three minutes are not taken into account.
SAIDI values for power supply in a European comparison (2013)
The following tabular list shows the SAIDI value and the share of renewable energies in gross final electricity consumption in a European comparison. The SAIDI values for Belgium, Finland, Norway and Estonia also include unscheduled events that are not taken into account in the regular SAIDI. Thus the value is set correspondingly higher.
| countries | Inhabitants (in millions) | SAIDI (in minutes) | RE shares in gross final electricity consumption |
|---|---|---|---|
| Luxembourg | 0.5 | 10 | 5.8 |
| Denmark | 5.6 | 11.25 | 43.1 |
| Switzerland | 8.1 | 15th | 19th |
| Germany | 80.6 | 15.32 | 25.3 |
| Netherlands | 16.8 | 23 | 10 |
| Austria | 8.5 | 33.96 | 68 |
| Belgium | 11.2 | 34.75 (inclusive) | 12.4 |
| Italy | 59.8 | 42.27 | 31.3 |
| Great Britain | 64.1 | 54.71 | 13.8 |
| Spain | 46.6 | 58.2 (2011) | 36.7 |
| Slovenia* | 2.1 | 60 | 33.1 |
| France | 63.9 | 68.1 | 16.8 |
| Hungary | 9.9 | 67.21 | 6.6 |
| Sweden | 9.6 | 70.77 | 61.8 |
| Lithuania | 3 | 72.67 | 13.1 |
| Ireland | 4.6 | 82 (2010) | 20.8 |
| Portugal | 10.5 | 88.7 | 49.1 |
| Greece | 11.1 | 96 | 21.2 |
| Czech Republic | 10.5 | 98.01 | 12.8 |
| Slovakia | 5.4 | 110.9 | 20.8 |
| Finland** | 5.4 | 138 (inclusive) | 30.9 |
| Norway* | 5.1 | 144 (inclusive) | 37.4 |
| Cyprus | 1.1 | 148 (2012) | 6.6 |
| Croatia | 4.3 | 176.1 | 42.2 |
| Poland | 38.5 | 254.9 | 10.7 |
| Malta* | 0.4 | 360 | 1.6 |
| Estonia | 1.3 | 378.5 (inclusive) | 13 |
| Latvia | 2 | 621 | 48.8 |
| Romania | 21.3 | 635 (2009) | 37.5 |
*, ** = alternative SAIDI indicators (e.g. T-SAIDI)
Web links
- Federal Network Agency: Quality of supply in the electricity sector
- Federal Network Agency: Quality of supply in the gas sector
Individual evidence
- ^ Sree Yeddanapudi: Distribution System Reliability Evaluation ( MS PowerPoint ; 430 kB) Iowa State University. Archived from the original on December 26, 2011. Info: The archive link was automatically inserted and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. Retrieved June 18, 2011.
- ↑ Failure and malfunction statistics for Austria 2020 (PDF; 918 kB) E-Control , August 2020, p. 6 , accessed on August 30, 2020 .
- ↑ Federal Network Agency - Supply quality - SAIDI value for electricity [1]
- ↑ Federal Network Agency - Supply Quality - SAIDI-Wert Gas bundesnetzagentur.de ( Memento of the original from December 21, 2016 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ↑ What is the SAIDI? Retrieved February 22, 2017 .
