Analyses of vacuum circuit breaker switching transients in medium voltage networks with respect to LC filters of solar converters

This paper presents possible transient states related to vacuum circuit breaker operation in PV power plant. Case study of transformer de-energization under no-load conditions was analyzed. The variation with respect to up-to-date studies is related to determination of solar converters LC filters influence on multiple arc re-ignitions occurrence during vacuum circuit breaker operation. Research covers both laboratory measurement as well as PSCAD simulations.