선택한 단어 수는 입니다.
최소 단어 이상 선택하여야 합니다.
최소 단어 이상 선택하여야 합니다.
선택한 단어 수는 30입니다.
최대 10 단어까지만 선택 가능합니다.
최대 10 단어까지만 선택 가능합니다.
제안 방법
- For the effect of the power system failure modes on the system, we performed modeling of the main components of the power system based on the power system of the LEO satellite that is now developed in Korea, and constituted the power system model that has unregulated bus structure. Additionally, we analyzed the power system characteristics considering the failure modes that can take place during the paralleled operation of the solar array regulator using the established power system model.
- In this article, the effect of the failure mode on the power system was investigated as regards the power system structure of the LEO satellite that is being developed in Korea, that is, the unregulated bus with 50 V bus power supply, for the failure mode that may take place in the parallel operation of the small-power capacity/high-efficiency solar array regulator. Firstly, we performed modeling of the main components of the power system to investigate the effects of the solar array regulator failure mode on the power system.
- In this article, we considered the failure modes that can take place during the parallel operation of the small-capacity/high-efficiency solar array regulator in order to meet the requirement of high power capacity that is gradually increasing to perform various satellite missions and obtain high-resolution images. For the effect of the power system failure modes on the system, we performed modeling of the main components of the power system based on the power system of the LEO satellite that is now developed in Korea, and constituted the power system model that has unregulated bus structure.
- Additionally, the small-capacity/high-efficiency solar array regulator modules can be operated in parallel so that the solar array regulator can be developed effective as the satellite power capacity becomes larger. In this study, the power system was established in the structure where two solar array regulator modules that can convert 500 W are operated in parallel. When the power conversion capacity should be increased in a satellite, small-capacity/high-efficiency solar array regulators can be easily added to establish the power system of a higher capacity.
- We analyzed the effect of the operation mode failure of the parallel modules in the solar array regulator on the power system. Since the modules are connected in parallel in the solar power regulator as the power capacity of the satellite power system is increased, we analyzed the effect of failure in one of the paralleled modules on the other modules. We took into account the short and open failure of the switch and the short failure of the capacitor in the solar array regulator as the failures that may happen during the parallel operation of the solar array regulator considered in this article.
- The current controller for the parallel operation of the solar array regulator was build to generate switching duty ratio (pulse width modulation) using the inductor current of the solar array regulator. The charge current mode controller, used as the controller in this study, generates the switching duty ratio by integrating the current flowing through the switch when the switch is on and comparing it with the reference control voltage. Fig.
- 11. The design values used for the setting of the model for the solar array regulator and the battery can be freely changed so that the capacity of the power system can be easily expanded depending on the power requirements to perform the satellite mission. Additionally, the small-capacity/high-efficiency solar array regulator modules can be operated in parallel so that the solar array regulator can be developed effective as the satellite power capacity becomes larger.
- If a power system is tested using the hardware only, the test conditions will be limited because the fabrication of the hardware requires much time and cost, and the setting up all the surrounding circumstances is difficult. Thus, the test under the conditions similar to those of space environment should be performed using a power system model based on the accurate analysis and modeling of the power system components such as solar array regulator, battery, and solar array. Further, since the protective system can be designed on the basis of the tested system data and the system to which to the protective technique has been applied can be tested again, and thus the reliability of the entire system can be elevated.
이론/모형
- Based on the circuit model of the solar array, the voltage-current equation was derived as shown in Eq. (1) in which the output current can be calculated with given input voltage by the Newton Raphson iteration method. The output variation by the temperature and the solar radiation is expressed as in Eq.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.