This paper proposes a tracking system considering a
shadow influence in order to improve the efficiency of PV
system. If distance of between PV arrays is not enough,
shadow can be occurred to PV module. The influence of
this shadow is decreased efficiency and generating of PV
system. Distance of between PV arrays and length of
shadow is changed according to position of solar.
Therefore, this paper proposes the back-tracking method
which is not shaded to a PV module using azimuth and
altitude of solar. The proposed method calculates distance
of between PV arrays using azimuth of solar, and calculates
shadow length of PV array using altitude of solar. The
proposed method calculates distance of between PV arrays
using azimuth of solar, and calculates shadow length of PV
array using altitude of solar and then compares with the
distance of between PV arrays and the shadow length.
When the shadow length is longer than the distance
between arrays, the algorithm adjusts altitude of array to
avoid the shadow influence.
Tracking system applying the proposed method in this
paper is compared with conventional tracking system about
AC power and generating in radiation changing condition.
The proposed system is higher power generation
(6.86[kW] a day and 123[kW] a month) than conventional
system. Therefore, the validity of the shadow
compensation algorithm proposed in the paper was verified.
This paper proposes a tracking system considering a
shadow influence in order to improve the efficiency of PV
system. If distance of between PV arrays is not enough,
shadow can be occurred to PV module. The influence of
this shadow is decreased efficiency and generating of PV
system. Distance of between PV arrays and length of
shadow is changed according to position of solar.
Therefore, this paper proposes the back-tracking method
which is not shaded to a PV module using azimuth and
altitude of solar. The proposed method calculates distance
of between PV arrays using azimuth of solar, and calculates
shadow length of PV array using altitude of solar. The
proposed method calculates distance of between PV arrays
using azimuth of solar, and calculates shadow length of PV
array using altitude of solar and then compares with the
distance of between PV arrays and the shadow length.
When the shadow length is longer than the distance
between arrays, the algorithm adjusts altitude of array to
avoid the shadow influence.
Tracking system applying the proposed method in this
paper is compared with conventional tracking system about
AC power and generating in radiation changing condition.
The proposed system is higher power generation
(6.86[kW] a day and 123[kW] a month) than conventional
system. Therefore, the validity of the shadow
compensation algorithm proposed in the paper was verified.
正在翻譯中..
