The most important facts
- VDE|FNN promotes the integration of Renewable Energies through uniform connection rules for the extra high-voltage network.
- New requirements on power generating plants in the extra high-voltage network improve system stability.
- The European Network Codes "Requirements for Generators" for the extra high-voltage level have been implemented.
VDE|FNN presents with the "Technical Regulations for the Connection of Customer Installations to the Extra High-Voltage Network and their Operation (TCR extra high-voltage)" (VDE-AR-N 4130) code of practice new and, for the first time at national level, Connection Rules for customer installations. This will ensure uniform requirements on all types of customer installations in extra high voltage: Producers, consumers, storage and combined facilities of generation/demand/storage. In addition, in Germany the new code of practice develops the relevant European Network Codes (RfG, DCC) for this voltage level. With its implementation, TransmissionCode 2007 (Chapter 3 and 5) as well as the VDN guideline "EEG Installations on the High-Voltage and Extra High-Voltage Network" for extra high voltage grid connections are replaced.
Key Innovations include:
- Higher requirements on active power matching at overfrequency/underfrequency. Power generating plants need to react faster on rising or dropping mains frequency by matching their feed-in power.
- Uniform requirements in line with European law on going through power system faults
- Defines uniform requirements on the grid connection of offshore wind farms with three-phase AC technology (currently planned for the Baltic Sea).
- Transfer of models: The generating plant operator hands over simulated calculations of his plant behavior to the network operator (so-called models).
- Verification procedures for extra high voltage are now subject to uniform regulation for the first time. Itemization procedures for conventional power plants and a plant certificate for customer installations from series production (e.g. wind power plants) are used as a rule.
Power generating plants, such as large wind farms – particularly ashore but also offshore – large conventional power plants, industrial parks, and some especially large electricity consumers such as aluminum smelters as well as distribution networks are connected to extra high-voltage (220 kV and above).
The publication has cleared another hurdle in the implementation of the European Network Code "Requirements for Generators" (RfG). The last one of four Technical Connection Rules has been published with the "Technical Connection Rules for Extra High-Voltage" by which this Network Code is implemented for Germany.
- Operators, erectors and planners or generating and consumption installations as well as combined facilities of generation/demand/storage connected to the extra high-voltage network
- Manufacturers of generating and consumption installations as well as combined facilities of generation/demand/storage connected to the extra high-voltage network
- Transmission system operators
Benefit and Improvement
With the new requirements, VDE|FNN creates, with regard to the energy transition, the basis for further development of customer installations in the extra high-voltage networks. The installations that are connected according to the new rules make a larger contribution to the stability of the overall system.
The "Technical Connection Rules for Extra High-Voltage (VDE-AR-N 4130)" code of practice is part of the VDE|FNN activities to safeguarding the continually safe plant operation with rising current consumption from renewable energies.
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