A wind turbine system includes a two-dimensional array of a plurality of modular wind turbine units arranged in a plurality of horizontal rows and vertical columns. The two-dimensional array of modular wind turbine units are carried by a frame structure including a plurality of parallel beams extending along a first orthogonal axis and spaced from each other along a second orthogonal axis, with the plurality of modular wind turbine units mounted between each pair of the parallel beams extending along the first orthogonal axis. Also described is a modular wind turbine unit particularly useful in such a system.
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