Which minister said the government was working to introduce a "virtual grid system" in Pakistan?

Explanation: The power minister said the government was working to introduce a virtual grid system and stated that there was currently no additional load-shedding in the country. A virtual grid aggregates distributed energy resources such as rooftop solar and storage, managing them digitally as a single dispatchable resource. For CSS Current Affairs, this intersects with net metering policy, the surge in solar imports from China and the financial stress this places on Pakistan's distribution companies.