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Discusses a large wind generator which joined the electric utility system in the town of Clayton, NM, and while much remains to be studied, already it is clear: the results are encouraging. Linked to the town's present system of seven diesel generators, the revolving wind blades can supply 200 kW of output power, nearly 15 percent of Clayton's total power load during off-peak periods. This result has become evident despite many early shakedown problems-most since solved-and operation in a system with significant frequency deviations. Technical evaluation is still under way, and operating and maintenance costs have yet to be fully analyzed. The operation is serving as a testbed for the impact of an intermittent power source on an electric-utility system. The machine in use is the US Department of Energy/NASA Mod 0-A and is rated at 200 kW in a 22.4-mi/h wind for a constant rotor speed of 40 r/min. It went into service in Clayton on Jan. 28, 1978.