Power quality is today a primary concern for the operation of CERN’s particle accelerators, and its importance will even increase for the FCC. Nowadays, transient voltage dips, generally coming from the 400 kV network, frequently cause undesired stops of the accelerators and, consequently, are a major contributor for accelerator downtime. Due to its much larger extent, the FCC will be exposed to a higher number of transient network disturbances, which are typically caused by thunderstorms.
The FCC powering systems needs to take into account the mitigation of these transient disturbances. In this presentation, the following three potential solutions will be analysed to mitigate the transient voltage dips: Dynamic Voltage Restorer (DVR) technology, High-Voltage DC (HVDC) back-to-back link and finally the use of a Medium-Voltage DC (MVDC) distribution network. All three solutions would require associated energy storage systems to allow the continuation of FCC operation during transient voltage dips.
For each solution, the main system design will be presented, advantages and disadvantages be discussed and the expected performance compared.