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Grid Expansion Onshore

 

Upon laying out the Scenario Framework for consultancy, it has been approved by the Federal BNetzA. The TSO also joined in order to create the first draft of the Grid Development Plan (NEP).

 

As in previous grid development plans, the NOVA principle (prioritisation of grid optimisation and amplification measures as opposed to purely expansion measures) was applied in determining the necessary measures to be taken. This figure shows the start- and endpoints of new routes in the NEP, but no concrete routes. These will be determined in the upcoming approval procedures. Besides this principle, there exist more innovative procedures to reduce the grid development requirements, to the least required degree. These procedures include weather-dependent overhead-line operators, the usage of conductor cables capable of withstanding high temepratures in frame of the Nova-Principle, elements for power flow control, grid-boosters and modern concepts for system operation [Netzentwicklungsplan].

 

 

 

 

Depiction of DC projects in Scenario B 2030 according to the first TSO draft

Data source: [UeNB]; [Netzentwicklungsplan]

 

 

According to the results of the TSOs' network analyses, the cost of network development requirements increased in the NEP 2030 (2019) compared to the NEP 2030 (2017). And this despite the fact that the number of total train path kilometres, both DC and AC connections, in the NEP 2030 (2019) is lower than the number of train path kilometres in the NEP 2030 (2017). The volume for AC and DC amplification and expansion measures in the new NEP in scenario B 2030 is estimated at around 11,600 km. This includes the DC new construction with a length of 3780 km, the AC grid new construction with a length of 1030 km and the DC / AC grid reinforcement with 6750 km. The costs amounted to €52 billion and increased by €19 billion compared to the NEP 2030 (2017). The investment costs for the additional network measures in the NEP 2030 are determined mainly on the basis of standard costs and are of a provisional nature [Netzentwicklungsplan].

 

In all scenarios for the target year 2030, renewable energies will account for at least 65 percent of gross electricity generation. The installed capacity of coal-fired power plants will be reduced from 46 GW to up to 17 GW. The results of the Commission "Growth, Structural Change and Employment" published by the Federal Government could not yet be taken into account in the current NEP. According to initial analyses, however, they are consistent with the assumptions made in scenarios B 2030 and C 2030 [Netzentwicklungsplan].