Design and Simulation of Geostationary Meteorological Satellite Power System
- Paper number
IAC-13,C3,P,15.p1,x19683
- Author
Mr. Miao Zihui, China
- Year
2013
- Abstract
FY-4 which is the second-generation geostationary meteorological satellite is able to get to multi-spectral, high-precision quantitative observational data and images of the Earth's surface and cloud, while also allows for vertical structure observations and lightning imaging observations of atmospheric temperature and humidity, multi-function, high observation frequency and precision. Compared with the first generation of geostationary meteorological satellite FY-2, the control mode changed to three-axis stabilized by the spin-stabilized, power dissipation from 300W up to 3000W, life span from 3-4 years up to 7 years, the proportion of power subsystem's quality of the whole satellite dropped to 7.5% from 8%, the enhance of the main technical indicators proposed more stringent requirements on the performance and reliability of the power system, therefore we need optimal design for mechanical, electrical, thermal of power subsystem's products. In this paper, the design of FY-4’s power system using the S3R full adjustment bus topology, improve the bus voltage from 28V up to 42V in order to increase the transmission efficiency of the system; using high specific energy of the lithium-ion battery pack instead of the nickel-cadmium batteries as the energy storage unit, to prevent monomer failure caused by the entire set of battery failure, increased BYPASS(the battery bypass device); increased the slave computer module in power controller for bus communication; on the basis of inherited mature technology, the entire power system was both scalable. On this basis, in order to ensure the functionality and performance of the power system to meet the needs of business applications, model of the power system was established; the current, voltage, and energy balance of the power system was analyzed by simulation. The simulation results show that the output of the solar array during the light period of the end of life was still more than 3% of the power margin, the maximum depth of discharge of battery during the shadow of the normal state was 63%, the maximum depth of discharge was 71% when one battery failure, similar to the design indicators. Not only to verify the compliance of FY-4 satellite power system design of the main technical indicators, but also accumulated data and experience for follow-up program optimization and testing of the whole satellite.
- Abstract document
- Manuscript document
(absent)