He told a government meeting on Friday that five high-voltage substations in the country's central, southern and southwestern regions were hit during Russia's air attacks a day earlier, news outlets reported.
The Ukrainian energy sector has been severely damaged following four months of Russian missile and drone attacks, officials have said.
'Russian terrorists do not give up'
Shmyhal told Cabinet ministers that Ukraine on Thursday "survived the 13th major air attack" against its energy system, according to the government website.
"Russian terrorists do not give up their attempts to destroy our energy system and deprive us of heat and light," he said, as quoted by the kmu.gov.ua website.
"This time, the main target of the enemy was high-voltage infrastructure," he added. "Air defense forces shot down most of the missiles. However, five high-voltage substations in the central, southern, and southwestern regions were hit."
Shmyhal also said during the meeting that Ukraine would need to finance a "huge budget deficit" of around USD 38 billion this year, Polish state news agency PAP reported.
"Another USD 17 billion this year will be needed for fast reconstruction of the energy, humanitarian de-mining, rebuilding of the housing, critical and social infrastructure," he was quoted as saying.
Ukraine 'preparing plan to restore energy system'
Shmyhal announced that Ukraine earlier this week managed to reach an agreement on increased Western assistance to help it restore its energy system, Ukrainian state news agency Ukrinform reported.
"We understand how to survive this winter, but we are already preparing a plan to restore our energy system in the spring and summer," he said, as quoted by the ukrinform.net website.
"We are not talking about temporary solutions, but about changing approaches, building and developing decentralized generation, and rebuilding and protecting distribution networks," Shmyhal added.
Source: PAP, ukrinform.net, kmu.gov.ua