Effects of solar activity on disturbances in Czech power grid: A preliminary assessment (in Czech only)

English: Solar eruptive events affect the close neighbourhood of the Earth. They also affect human infrastructure, power grids mainly, due to the induction of electrical currents. Only recently the attention was drawn not only to large flares, but also to estimate the long-term effects of increased solar activity by statistical methods. We analyse the failure rates in the main Czech power transmission system operated by the Czech national operator \v{C}EPS. We show that the effects of solar activity on failure rate in the main Czech power grid cannot be excluded even for central-european country. This is a preliminary study. Czech: Eruptivn\'i projevy slune\v{c}n\'i aktivity ovliv\v{n}uj\'i bezprost\v{r}edn\'i kosmick\'e okol\'i na\v{s}\'i Zem\v{e} a postihuj\'i prost\v{r}ednictv\'im indukce elektrick\'ych proud\r{u} i pozemskou infrastrukturu, zejm\'ena rozvodn\'e s\'it\v{e} silov\'e elekt\v{r}iny. Teprve v posledn\'ich letech byla v\v{e}nov\'ana pozornost nejen hodnocen\'i bezprost\v{r}edn\'ich dopad\r{u} siln\'ych eruptivn\'ich ud\'alost\'i na za\v{r}\'izen\'i rozvodn\'e s\'it\v{e}, ale tak\'e statistick\'emu zhodnocen\'i vlivu zv\'y\v{s}en\'e slune\v{c}n\'i aktivity. Ve spolupr\'aci s \v{C}EPS, a.s., jsme statisticky vyhodnotili \v{c}etnost z\'avad na za\v{r}\'izen\'ich p\'ate\v{r}n\'i rozvodn\'e s\'it\v{e} \v{C}R v z\'avislosti na \'urovni slune\v{c}n\'i aktivity a ukazujeme, \v{z}e vliv n\'ahl\'ych eruptivn\'ich ud\'alost\'i na z\'avadovost za\v{r}\'izen\'i \v{c}esk\'e rozvodn\'e s\'it\v{e} nelze vylou\v{c}it.