CPV SYSTEM AND METHOD THEREFOR

摘要

A concentrated photovoltaic system (10) uses a semi-dense array of photovoltaic cells (76) in combination with a point-focus, reflecting primary concentrator (12) and a number of linear, refracting secondary concentrators (22). The secondary concentrators (22) are configured as totally internally reflecting lenses, wherein each lens covers an entire planar receiver tile (38) holding a multiplicity of photovoltaic cells (76). A large number of receiver tiles (38) may be used in the converter (10). The cells (76) are arranged in dense, nearly abutting, sub-arrays (92) that are spaced apart from other sub-arrays (92). Photovoltaic cells (76) from a few nearby sub-arrays are coupled in parallel to drive a DC/DC MPPT boost converter (100). DC outputs from several boost converters (100) are series coupled to form a high DC voltage string which drives a DC/AC inverter (122). AC outputs from several DC/AC inverters (122) are combined in a multi-winding transformer (124) to generate a sine wave with low harmonic distortion.