VA HB429

Extends electric utility integrated resource plan (IRP) planning periods from 15 to 20 years and shifts to triennial filings starting in 2027 for Phase II Utilities and 2028 for Phase I Utilities, with annual updates required in non-filing years

Requires IRPs to include the social cost of carbon in generation operating costs and identify a single preferred portfolio that meets renewable portfolio standards and carbon emission retirement requirements under existing Virginia law

Mandates utilities provide stakeholders access to the same modeling software, assumptions, inputs, and data used in IRP development, with a third-party facilitator selected by the State Corporation Commission to coordinate public engagement

Requires evaluation of grid-enhancing technologies including advanced conductors, dynamic line ratings, virtual power plants, and surplus interconnection service before proposing new transmission infrastructure

Directs the State Corporation Commission to convene a stakeholder work group to develop IRP guidelines by March 1, 2027, with final regulations due by September 1, 2027, addressing comprehensive generation, transmission, and distribution planning