Distributed Energy in IGCEP: Planning for the Solar the DISCOs Already Host
National generation plans are only as honest as the rooftop, captive, and feeder-level forecasts distribution companies supply, or fail to supply. In Pakistani planning language, distributed energy resources span net-metered and behind-the-meter solar, captive generation, small cogeneration, demand response, and eventually distribution-connected storage and electric-vehicle chargers. Unlike utility-scale interconnection-ready nodes in ARE auctions, these resources sit on DISCO networks, reshape net load, and often never appear as Central Power Purchasing Agency contracted capacity. They still move fuel-cost adjustments, sales volumes, and resource adequacy.
Ignoring them is how a country commissions central plants for daytime energy the rooftops already displaced. The National Electricity Plan 2023-27 and IGCEP directives under Grid Code 2023 require each DISCO, coordinating with ARE facilitation offices, to provide distributed-energy estimates to the system planner. Net-metered systems are better counted because interconnection and billing create a register. DISCOs losing volumetric sales may under-report distributed trajectories that undermine their multi-year tariff sales forecasts, or overstate distributed generation to excuse under-recovery.
Feeder data quality without advanced metering leaves hosting capacity and reverse-power risk as guesses. Net billing and related reforms change export economics and therefore growth rates. Self-consumption becomes more valuable than export when credits sit near avoided energy cost rather than retail. Commercial load management and AT and C loss trajectories in the National Electricity Plan make distributed-energy and loss forecasts jointly political. A DISCO that blames solar for collection failure while theft and under-billing persist is not supplying a clean planning input.
Equity belongs in the planning memo, not only in social policy annexes. Monthly interconnection queues, inverter telematics where available, and feeder-level export totals should feed a planner-readable warehouse with vintage stamps. October 2025's practical test is whether the next IGCEP vintage shows DISCO-level distributed scenarios with sources, capacity-credit assumptions, and a reconciliation to interconnection registers. A generation plan that ignores the prosumer fleet is a plan for the wrong country.