Abstract: TenneT is supposed to replace 140-150 stations in the 110/150 kV grid in the next 10 years. The speed of component replacement alone is too low, which is why TenneT has chosen to replace the stations in their entirety for a modular and modern set-up. These stations will be equipped with a new secondary system based on IEC 61850 and modern IEDs as a replacement for the current serial field control system. In addition to a replacement of the secondary system, the primary part will also receive an upgrade. To gain experience and to test innovations such as modular skids, new AIS and GIS components, data communication networks and IEC 61850, TenneT has selected 6 stations for a so-called proof of concept. Parallel to the 6 stations, preparations have started to equip a grid link in the 110kV grid with LPIT and IEC 61850 process bus technology to evaluate the operation and to take a decision about the future of process bus within TenneT and the field replacement program. The presentation will provide a glimpse into the preliminary phase of standardization, tendering and implementation of the 6 proof of concept stations and the experiences so far.

 

 

Abstract: Dynamic System Rating (DSR) combines Dynamic Line Rating (DLR) and Dynamic transmitting power (DPR) of the substation to enable efficient management of renewable connections end to end (from generation to the grid supply). To date, DLR employed in transmission/distribution system overhead line enables efficient transfer of power generated by the renewables during peak and off-peak hours. However, that is only one part of the story, the transmitting power is not only limited by the thermal rating current (thermal stability, beyond which value, the line will be meltdown), but also limited by the upper-limit active power due to the angular and voltage stabilities. Sending these Dynamic system rating currents and powers to the controller (and or contingency analysis, N-1) will get the most optimal operating power flow dispatching with the lowest power loss and lowest risk of over thermal and stability issues.

 

Abstract: With the energy transition, new solutions are required to support faster and better the user needs.  Digital Twins for Energy Automation generate value along that journey across the power system lifecycle. The calculation and optimization of protection settings is presented with a ultra-high-fidelity Software-in-the-Loop concept, as well as how to reduce project times with virtual commissioning and advanced remote support for protection devices. In addition digital twins enable a more efficient training to introduce  latest IEC 61850 technologies as well as to support your operation team to secure grid resilience.

  

Migration of the Protection Data Interface from SDH to MPLS Networks    Presenter: Andreas Aichhorn | Sprecher-automation, Austria

Abstract: With the constantly growing demand for bandwidth, the technical and economic requirements for communication networks and the associated challenges are also increasing. Synchronously clocked communication networks, so-called SDH networks, were widespread used. These networks function on the principle of time-division multiplexing, which is not capable to work bandwidth efficiently. Consequently, SDH networks have been successively replaced by packet-switched networks such as MPLS systems. The change in network technology also leads to a change in transmission characteristics. For a proper migration, it is necessary to adapt the end devices to the characteristics of the network technology in order to realize the most efficient and reliable communication. This change affects the protection data interface of line current differential protection systems since a function-defining deterministic propagation delay in the communication network was assumed up to now, which is no longer given if Ethernet-based networks are used.
This presentation explains the mechanisms of the communication networks and possible migration concepts from SDH to MPLS communication for the protection data interface of line current differential protection systems.

 

Abstract: This presentation shows a newly developed adaptive out-of-step (OOS) protection algorithm, which uses the wide-area measurement system for input data. The developed algorithm is based upon the real-time computation of the system impedance and makes use of the well-known power-angle characteristic. In this way, a setting-less OOS concept in a real-time environment is developed, applicable for tie-lines in an arbitrary power system. The developed protection algorithm is installed on hardware and is verified by numerous tests using hardware-in-the-loop simulations. The performance of the new hardware implementation is compared to the traditional impedance-based OOS protection methods. The results of the hardware-in-the-loop simulations confirm that the proposed algorithm detects OOS conditions faster and more reliably than the existing impedance-based solutions.