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Network and system security

Network and system security

The network operators are, by law, authorised and obliged to take certain measures to maintain the security and reliability of the electricity supply system.

There are various measures:

Redispatching: Reducing and increasing electricity feed-in from power plants according to a contractual arrangement with a network operator or with a statutory obligation towards the network operator with reimbursement of costs

Reserve power plants: Deployment of reserve power plant capacity to compensate for a deficit of redispatch capacity according to a contractual arrangement with costs being reimbursed

Feed-in management: Curtailment of energy fed into the grid from renewable sources and combined heat and power plants at the network operator's request with reimbursement of costs.

Adjustment measures: Adjustments of feed-in and/or offtake of electricity at the network operator's request without compensation for costs if the other measures are insufficient.

The network operators are obliged, without undue delay, to inform the regulatory authority of the reasons for the adjustments and measures that were implemented.

Current report on network and system security-measures

Because there is a delay between the notification and the actual balancing of the measures, data submitted to the Bundesnetzagentur is updated on a regular basis. This is the reason why adjustments might also be made to data from a quarter that had already been evaluated. The most up-to-date data on the reporting periods can be found in the table and in "Quartalsbericht in Zahlen".

Quartalsbericht zu Netz- und Systemsicherheitsmaßnahmen

Bericht zu Netz- und Systemsicherheitsmaßnahmen - 4. Quartal und Gesamtjahr 2017 (pdf / 3 MB)(German only)

Data for the year 2017

Summary of the measures in 2017 (in GWh)	Q 1	Q 2	Q 3	Q 4	total
Data source: Monitoring, Bundesnetzagentur
Redispatching Reducing and increasing electricity feed-in from market active power plants by TSOs	8,470	3,192	2,144	4,649	18,455
Increase of reserve power plants	1,504	53	56	515	2,128
Feed-in management Unused energy = feed-in from renewable energy sources and combined heat and power plants blocked by TSOs and DSOs	1,412	1,364	435	2,307	5,518
Adjustment measures in accordance with section 13(2) of the Energy Act (EnWG) (TSOs and DSOs)	6	2.2	2.1	24.2	34,5

Data for previous years

Summary of the measures (in GWh)	year	Q 1	Q 2	Q 3	Q 4	total
Redispatching	2016	3,095	1,939	1,452	4,189	11,475
	2015	3,329	1,811	3,336	6,961	15,436
Feed-in management	2016	1,524	534	551	1,134	3,743
	2015	1,135	737	815	2,036	4,722
Adjustment measures	2016	6.6	2.2	0.6	4.9	14.4
	2015	8.7	4.7	6.2	6.6	26.5