چكيده به لاتين
Abstract:
A geostationary satellite is a satellite in geosynchronous orbit, which is placed approximately 35800Km above mean sea level, with an orbital period the same as the Earth's rotation period (23 hours, 56 minutes and 4 seconds). Since geostationary satellites appear to be fixed over one spot above the equator, receiving and transmitting antennas on the earth do not need to track such a satellite. These antennas can be fixed in place and are much less expensive than tracking antennas. These satellites have revolutionized global communications, television broadcasting and weather forecasting, and have a number of important defense and intelligence applications. Required power of these satellites is supplied with solar arrays in their lifetime (around 10 years).
In this thesis the MPPT (maximum power point tracking) systems of solar arrays is studied in order to improve the generated output power. This systems require a feedback to moderate communication device power against earth shadow and temperature variations. In the end 3 different methods of MPPT is investigated for different circumstances of geostationary satellite and their results are compared with each other.
Keywords: Maximum Power Point Tracking, Geostationary satellite, photovoltaic
