There's no indication in the article that the DDoS and power station failure are connected. In fact, the article says "officials did not initially comment on whether they suspected a connection between the explosion and cyberattack."
Operator LUMA has a nice set of PR releases regarding the *supposedly unrelated* incidents here: <a href="https://lumapr.com/news/?lang=en" rel="nofollow">https://lumapr.com/news/?lang=en</a>