|European Union Electricity Market Glossary|
Pursuant to the rules applying in the European Union Internal Electricity Market 'congestion' means a situation in which all requests from market participants to trade between two bidding zones cannot be accommodated because they would significantly affect the physical flows on network elements which cannot accommodate those flows (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), Article 2(2)(c)).
The EU Network Code on System Operation in Article 55(c) lists congestion management services among services provided by third parties, through procurement when applicable, that each Transmission System Operator (TSO) uses for ensuring the operational security of its control area.
ACER/CEER Annual Report on the Results of Monitoring the Internal Electricity and Natural Gas Markets in 2017 Electricity Wholesale Markets Volume October 2018 (p. 8) indicates that where sufficient information is available (e.g. in the CWE region), it confirms that congestion most often relates to intra-zonal critical network elements (CNEs) rather than to interconnectors.
ACER/CEER refers to the example, when congestion occurred in the CWE region, internal lines constrained available capacity much more often (86% of occurrences) than cross-zonal lines (14%) in 2017. More than half of these occurrences related to CNEs located inside Germany.
According to the ACER/CEER this shows that capacity calculation methodologies often lack rules to avoid internal exchanges being unduly prioritised over cross-zonal ones.
Network Code on System Operation, Article 55(c)
|Last Updated on Sunday, 11 November 2018 16:18|