Officials said supply of power was cut to Delhi by a total of 300 MW from NTPC's Singrauli plant in UP and Nathpa Jhakri and Karcham plant in Himachal Pradesh.
They said supply of power to Delhi was also affected due to overloading of Agra-Gwalior power transmission corridor.
"The overloading of Agra-Gwalior power transmission corridor affected the frequency in the Northern Grid. To maintain the frequency in the Northern Grid we had to resort to loadshedding," said the officials.