An Advanced Series of Wind Turbines Now Feature Power Electronics Capable of Controlling and regulating system voltage. This technology provides further justification for utilities' investments in wind power, particularly in some rural areas with weak grids.
Coal

Acoustic cleaning devices can be used to prevent the accumulation of ash and particulate matter on various pieces of plant equipment, including the boiler, baghouse filters, electrostatic precipitators, fan blades, hoppers and ducts.

A radio station recently held a contest for people to submit their theories on any subject. Here are the winning entries: