The American Public Power Association has published its latest biennial report on the impacts of mandatory capacity markets. This report is not a theoretical analysis. It looks at individual projects built in 2013 and how they were financed. Most of the 24 page report is appendices with tables describing the new generation plants built in 2013. As in their 2012 report, APPA concludes that, particularly in terms of stimulating new generation in areas where it is needed, capacity markets run by RTOs have almost no impact on creating new generation.
As was found in the analysis of 2011 generation, almost all new capacity was constructed under a long-term contract or ownership. Just 2.4 percent of the new capacity was built for sale into a market, a number that includes new facilities for which no information could be found about the contracts. Moreover, when broken down geographically, only 6 percent of all capacity constructed in 2013 was built within the footprint of the RTOs with mandatory capacity markets.
Are the capacity markets the least-cost means to achieve reliability?These constructs are costing consumers billions of dollars for little in return, for the following reasons:Different resources have different costs.In these markets, a 50-year old coal plant is paid the same amount per MW and for the same duration as is a brand new highly efficient combined-cycle natural gas plant as is an agreement by a factory to curtail load when needed. As a result, excess windfall revenue is paid to the older depreciated plants and the revenue stream is not stable enough to attract investors in new resources. The bulk of revenue has been paid to existing plants. In the PJM Interconnection (primarily covering Maryland, New Jersey, Pennsylvania, Virginia, West Virginia, Ohio, northern Illinois, and Delaware), $72 billion has been paid or will be paid by consumers to generators and other capacity providers. Yet over 90 percent of this revenue has gone to existing generation, although many older plants have paid off much of their fixed costs. Moreover, most of the new generation capacity that has been built was done so under utility ownership and long-term contracts, not as a result of capacity market payments.Capacity markets do not ensure an appropriate mix of resource types.Because the capacity markets do not distinguish between technology types or specific locations on the grid, critical needs are not addressed, including adequate flexible ramping capability to match the variability of renewable resources, reliability gaps created by retiring coal plants, the coordination of natural gas infrastructure and delivery with the significant expansion of natural gas generation. As a result, the RTOs often create systems of side payments to ensure reliability, such as direct payments through what are known as reliability-must-run agreements to coal plants to remain in place to ensure reliability.Price signals are not effective.If transmission congestion limits the ability of capacity in one area to deliver lower cost power to another zone, the more congested zones may have a higher price. The theory behind zonal price differentials is that higher prices will act as a “signal” for the development of new generation or transmission. But such higher prices are not effective signals because owners of generation have no financial interest in building new resources and lowering prices for their existing units; investors seek steady and predictable revenue flows, not fluctuating prices; and many other factors influence the decision to build, including land and transmission availability, local acceptance, and environmental rules. Transmission construction may alleviate these price differentials, meaning that consumer paid both for higher prices and for the cost of the transmission.