This is the 4211th most frequent Russian word.
укрэнерго
"Укрэнерго" refers to "Ukrenergo," the national energy company responsible for electricity transmission and operation of Ukraine's power grid.
In this sentence, 'Укрэнерго' is used as a proper noun to denote the national energy sector operator of Ukraine.
«Укрэнерго» является главным оператором электроэнергетической сети Украины.
"Ukrenergo" is the main operator of the electric energy grid in Ukraine.
Here, 'Укрэнерго' is again a proper noun, referring to the organization responsible for power grid management, described as the subject experiencing troubles.
Перебои в работе «Укрэнерго» могут привести к отключению электроэнергии.
Disruptions in Ukrenergo's service can lead to power outages.
'Укрэнерго' is used to signify the organization whose infrastructure is subject to inspection and modernization.