The sub-station has been set up by Delhi Transco Limited, the utility which maintains all the major transmission lines in the city, at a cost of Rs 58.31 crore.
Speaking on the occasion, Dikshit said demand of power in Delhi has been increasing at an annual rate of around 8 per cent and to keep pace with the rising demand, the power companies have to strengthen their networks.
She also complimented Delhi Transco Ltd for doing a "great job" in making the transmission network capable of carrying higher loads.
The maximum power demand in the city in the last summer was 5,028 MW and it is projected to reach 5,500 MW this summer, she said, adding that government was doing its best to ensure adequate availability of power during peak summer months.
"Population is increasing in Delhi and hence the demand of electricity, too, is increasing," she said, adding that high demand is resulting in increase in electricity tariff.
On power production at Bawana power plant, she said the plant will be able to produce 1,500 MW of power by November if government can procure gas for it.
"The major challenge before the power sector is the gas procurement. The gas production is all time low and its prices are rising day by day," she said.
Speaking on the occasion, Power Minister Haroon Yusuf said the reforms in the power sector has started showing Results.
"The progress made in the power sector of Delhi has been appreciated at various international forums. The power companies can achieve new milestones in coordination with each other," he said.