Thursday, April 14, 2011

Unintended Consequences of Renewable Energy

Those who rant for simplistic solutions often overlook "unintended consequences" of their choices. Here's a bit from a newspaper article from the Seattle Times noting a conflict between wind generated power and hydropower from large dams in the state of Washington. I'be bolded the key bit:
Pacific Northwest wind-power producers are battling a proposal that could force them to periodically shut down their plants in the months ahead, potentially costing them millions of dollars in lost revenue.

Bonneville Power Administration (BPA) officials say that limiting wind production could be required to free up space in the regional transmission system to handle hydropower generated from the melt-off of a huge mountain snowpack this year.


The dispute reflects major strains on the regional power system, which has been reshaped by a dramatic expansion of wind power in Washington and Oregon. Most of that power is exported to California and other markets outside the Northwest.

Wind-power producers say the BPA should compensate them financially for any prolonged shutdowns ordered by the agency. Their ranks include Puget Sound Energy, which has built wind farms in Washington.

BPA officials say the shutdowns will only happen as a last resort and that wind producers should not receive compensation.

Such payments would raise operating costs and could push up rates for the BPA's major customers — Northwest public utilities, including Seattle City Light, which have endorsed the agency plan.

"We think that is not a fair transfer of costs and puts too much of a burden on public-utility ratepayers," said Doug Johnson, a BPA spokesman.

During the past decade, wind power has attracted billions of dollars of investment, driven in part by tax incentives and state requirements that utilities buy renewable energy other than hydro power.

When the winds are fierce, the Northwest farms are capable of producing up to 3,500 megawatts of power. That's more than triple the energy of the Northwest's sole nuclear-power plant.

Total wind-power capacity could double by 2015.

The BPA manages the regional power-supply system by balancing, minute by minute, the flow of electricity surging through the system with demand.

As the wind industry expands, the BPA has found it more difficult to transmit all that power and still meet other responsibilities, which include selling hydro power outside the region and spilling water over dams to aid the passage of migrating salmon.

Last June, the BPA balancing effort turned into a high-wire act as a late snow melt unleashed a gusher of water down the Columbia River at the same time that winds whipped up the power turbines.

BPA officials said that they couldn't divert all the water around the hydroelectric turbines without putting too much dissolved gas into the river and placing salmon at risk. So they ended up running more water through the dam turbines and giving away their surplus power to utilities all over the West.

That spurred the agency to develop a new proposal to periodically shut down wind-power farms to help balance loads. The plan was embraced by public utilities across the region.

The idea that variable power sources like solar and wind generated electricity can be simply "mandated" politically with no consequences is foolish. Voters who act on "good feelings" and without "hard thinking" create problems that they are completely unaware of. Sad.

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