Solar array power output maximization through corrected sun tracking methods

摘要

An array of solar collectors track the sun based on measured values of power output from the array and from a sun sensor on the array. The sun is tracked by periodically adjusting the altitude and azimuth of the array so the collectors remain pointed at the sun to maximize an amount of solar flux reflected from the collectors. The sun sensor, which detects alignment of the sun, recognizes when relative movement of the sun causes about a 10% reduction in power output of the array. The altitude and azimuth of the array are readjusted based on output from the sun sensor. While the array is being reoriented, power output from the array is monitored, and values for power output versus orientation of the array are recorded. Offset values between the power output, sun sensor output, and the ephemeral equations are calculated by comparing these values during operation.

主权项

1. A method of positioning an array of solar collectors comprising:
a. monitoring an output from a sun sensor that is positioned on the array separate from the solar collectors; b. orienting the array so that the output from the sun sensor is substantially at a maximum value; c. monitoring a power output from the array and associated orientation of the array when the array is on-axis; d. estimating an offset value based on a comparison between the orientations of the array when the output from the sun sensor is substantially at the maximum value, and the array is on-axis; and e. adjusting orientation of the array based on the offset value.