Case studies on integrating renewable resources.
Where wind integration has been most successful, state authorities developed and adopted basic transmission planning and cost allocation principles before FERC issued Order 1000. Experiences in Texas, California, and Hawaii demonstrate what it takes to overcome permitting and cost allocation barriers—namely, a coherent policy framework and close coordination among stakeholders.
Intermittent and interruptible resources increasingly are being considered in regional resource adequacy calculations—but the approaches differ.
While both NERC and the NERC regional councils (known today as the Electric Reliability Organization) have standards and guidelines for resource adequacy and system reliability, much of the specificity as to how interruptible (e.g., demand-side) and intermittent resources (e.g., wind) are included is left up to the individual ISO/RTOs, states, provinces, etc. In fact, the various regions across North America each seem to have their own methodology for incorporating these resources into their resource adequacy and reserve-margin calculations. As the North American energy industry escalates its desire to reduce greenhouse-gas emissions through the expanded use of demand-side resources and intermittent renewables, the importance of this topic also will escalate.
State PUCs
T+D Investment Risk. The Maine PUC appeared to take a pro-consumer stance in setting principles it will use to set a revenue requirement for transmission and distribution (T&D) services provided by Bangor Hydro-Electric Co. after the company becomes a wires-only utility on March 1. The PUC downplayed the risk of wires operations, adopting a return on equity of 11 percent and disallowing about $3.5 million of some $71 million in claimed T&D costs.