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Solar PV Power System - Introduction |
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Projects
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Engineering
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Engineering Implementation
During the installation and construction of PV power station or
household system, consideration should first be given to the
following factors.
1. PV power system shall be designed in such a way that its
highly reliable performance and normal operation under severe
conditions can be guaranteed. Meanwhile, the system is required
to be easy for operation and maintenance, thus convenient for
users’ operation and daily maintenance.
2. Considering the low-cost design, manufacturing and
construction of the complete set of PV power system,
standardized and modularized design of the equipment and
enhancement of the versatility and interchangeability of spare
parts, it is required that the system shall reserve expansion
interface for the future increase of scale and capacity.
3. During concrete implementation, the solar module shall be
installed with appropriate azimuth angle and inclination angel,
so as to ensure that the solar module achieves most optimized
performance. Selection of the installation place shall guarantee
that the module can be irradiated by sunlight from 9:00 AM to
3:00 PM during days with minimum exposure time throughout the
year in the local area.
4. Installation structure of the module shall be able to resist
environmental stress of wind, snow, etc. and the mounting holes
shall guarantee easy installation and protection from mechanical
stress. It is recommended to use correct materials for
installation structure so that corrosion of the module frame,
installation structure and materials could be reduced to the
minimum.
 As
required, PV power system is generally installed outdoors to
endure the test of wind, rain, sun, etc. Continuous and stable
power supply is required. As for natural and weather conditions,
most consideration is given to continuous overcast and rainy
days. Therefore energy balance design shall be made for the
power system, and the operation mode with most severe
requirement for PV power system shall be adopted for design. In
this way, it can be ensured that the system can provide normal
power supply to the loads at different times, in different
seasons and under different climatic conditions.
When the photovoltaic module operating, it shall be installed in
a direction so that sunlight irradiation can be received at the
maximum. In consideration of the change of sunlight incidence
direction in a day and the difference of solar altitude from the
horizon line in winter and summer, it is recommended that
generally the module shall be installed inclined towards the
equator. That is to say, in the Northern Hemisphere the
light-receiving surface of the module shall be directed towards
the sough and in the Southern Hemisphere the light-receiving
surface of the module shall be directed towards the north.
Generally, for the angle between the module and the ground,
reference shall be made to local latitude ± (5°-10°).
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