Wind turbines in the Bonneville Power Administration’s transmission grid generated over 4,000 megawatts for the first time on Sunday, March 11, producing nearly twice as much energy as that generated by coal, gas and nuclear plants connected to BPA’s system at that time.
Wind generation on BPA’s system surpassed the 4,000 megawatt milestone at 3:22 p.m., reaching a new all-time peak of 4,039 megawatts about an hour and a half later. BPA expects to have 5,000 megawatts of this clean, emission-free, renewable resource connected to its system by 2013, several years ahead of earlier estimates.
The growth of wind power on BPA’s grid continues to exceed expectations by adding almost 1,000 megawatts in just the last 12 months.
BPA officials say efforts continue in expanding and reinforcing the agency’s transmission system to support wind integration. Here are some examples:
-- BPA recently completed a 79-mile-long, 500-kilovolt power line and is constructing another high voltage line. When the second is complete BPA will be able to offer approximately 3,000 megawatts of firm transmission service to wind facilities that have requested it.
-- Like a freeway interchange BPA recently put into service another large substation to enable wind to get to the power grid. The Central Ferry Substation, located in Garfield County in southeast Washington, feeds energy from Puget Sound Energy’s new Lower Snake River Wind Project into BPA’s massive transmission system. The Snake River project is now providing 343 megawatts of wind power.
-- BPA has developed a “state of the art” wind speed and wind generation forecasting system that forecasts up to three days in advance as opposed to the previous system that provided information only one hour ahead.
-- BPA says it continues to expand a pilot program that allows customers to adjust schedules every 30 minutes. Traditionally, utilities schedule electricity generation on an hourly basis. But wind generation changes much more rapidly. This enables utilities and wind plant operators to save money by finding places to sell energy when they are producing more than they schedule. It also provides them the opportunity to find other resources to replace the energy if they are producing less than they have scheduled.