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What effect do wind turbines have on the transmission grid?

Wind turbines can provide a unity power factor and help in stabilizing voltage. Newer wind generators have switched capacitors that are applied as generation and VAR demand increases, keeping power factor above 99 percent. One turbine now on the market uses power electronics and a variable speed rotor to automatically maintain the desired grid voltage or reactive power flow to the utility. This design feature is particularly beneficial to weaker grids.