I recently wrote about how our risk tolerance/aversion powerfully affects our estimation of the social cost of carbon, but obviously that’s not the only place that risk shows up in our energy systems. Fossil fuel based electricity is also exposed to a much more prosaic kind of risk: the possibility that fuel prices will increase over time.
Building a new coal or gas plant is a wager that fuel will continue to be available at a reasonable price over the lifetime of the plant, a lifetime measured in decades. Unfortunately, nobody has a particularly good record with long term energy system predictions so this is a fairly risky bet, unless you can get somebody to sign a long term fuel contract with a known price. That doesn’t really get rid of the risk, it just shifts it onto your fuel supplier. They take on the risk that they won’t make as much money as they could have, if they’d been able to sell the fuel at (higher) market rates. If the consumer is worried about rising prices, and the producer is worried about falling prices, then sometimes this can be a mutually beneficial arrangement. This is called “hedging”.
Continue reading Facing the Risk in Fossil Fueled Electricity
Risk isn’t free; it’s a traded commodity with a price. Most prudent financial entities with a lot of exposure to the prices of natural resources try to manage unpredictable fluctuations in those prices by trading in risk. Producers worry about prices being too low; consumers need to protect against prices being too high. Risk trading (hedging) allows the two types of parties to share these risks, and so create a more stable market overall. Stable prices are good for business. You can plan around them in the long term, even if they end up being a bit higher on average.
In regulated electricity markets like we have in Colorado, fuel price risk often ends up being borne primarily by the rate payers rather than by the utility companies. In theory, state regulators ought act on behalf of the public (energy consumers) to accurately represent their tolerance of or aversion to risk in the resource planning process. Historically, the implicit assumption has been that the rate paying public is fairly risk tolerant, i.e. very little has been done from a regulatory point of view to avoid the potential detrimental effects of future fuel price volatility. This is a historical accident. Until recently, we didn’t have much choice in the matter. Of all the major sources of power available a century ago when we began electrifying society, only hydroelectric is similar in terms of its capital and operating structure to distributed renewables like wind and solar. All three have relatively large up front capital costs, and low ongoing operating and maintenance expenses. But for most of the time we’ve had electricity, most of that electricity has necessarily been dependent on fossil fuels, and so the question of whether or not customers wanted to take on the risk of future fuel cost fluctuations was immaterial. Fuel was the only option for expanding our electricity supply once we’d tapped the easily accessible hydro — if you wanted lots of power, it simply came with fuel price risks. This is no longer the case. Today, we have options that trade off between cost and risk, but so far as I can tell we haven’t done a good job of talking about the entire spectrum of possibilities. Broadly they seem to fall into four categories:
- Traditional fossil fuel-based power, that exposes rate payers to the full range of future price fluctuations.
- Capital intensive, fuel-free power like wind, solar, enhanced geothermal and hydro which have a range of prices, that are very predictable over the 20+ year lifetime of the capital investment.
- Fossil fuel-based power that is aggressively hedged, in order to protect rate-payers against future fuel price fluctuations.
- Fuel-free power with predictable future costs, combined with someone else’s fuel cost risks, which rate-payers would be paid to take on.
The first two options are the most commonly discussed. The third — hedged fossil fuels — is becoming somewhat more common, with some public utility commissions requiring the utilities they regulate to dampen fuel cost fluctuations. However, they generally do not require the utilities to hedge to the point where the risk profile of the fossil fuel option is similar to that of fuel-free power sources. This is what makes the fourth option interesting.
Continue reading Could utility ratepayers be paid to accept fuel price risk?
When people compare the cost of gas-fired electricity and renewables, they usually don’t price fuel cost risks, and at this point that’s really just not intellectually honest. Risk-adjusted price comparisons are very difficult because nobody will sell a 30 year fixed price gas supply contract, and that’s what you’d need to buy to actually know how much your gas-fired electricity will cost. Even a 10 year futures contract doubles or triples the cost of gas. You can’t buy renewables without their intrinsic fuel-price hedge, and that hedge is valuable. The question shouldn’t be “Is wind the absolute cheapest option right now?” it should be “Given that wind will cost $60/MWh, are we willing to live with that energy cost in order not to have to worry about future price fluctuations?” And I think the answer should clearly be yes, even before you start pricing carbon.