Date of Award
2024
Publisher
North Dakota State University
Document Type
Thesis
Degree Awarded
Master of Science (MS)
Department
Electrical and Computer Engineering
College
Engineering
Faculty Advisor
Beik, Omid
Description
This thesis introduces a medium voltage direct-current (MVDC) system for large spacecrafts with megawatt (MW)-scale power and propulsion systems for interplanetary transport. The proposed MVDC system comprises a nuclear electric propulsion (NEP) powered permanent magnet generator, a solar photovoltaic (PV), a backup battery energy storage system (BESS), an electric thruster, AC/DC loads, and the spacecraft low-voltage DC (LVDC) power system. The NEP is the main power source for the thruster, while the solar PV and BESS support payload and low-voltage systems. The energy sources are connected to the MVDC bus through power electronics converters. Unidirectional boost DC-DC converter and bidirectional boost DC-DC converters are adopted on the PV and BESS sources, respectively, while an isolated DC-DC converter is used to provide power to the thruster. To attenuate external disturbance and enhance the robustness of the proposed MVDC system, uncertainty and disturbance estimator (UDE) based controllers are designed for the power electronics converters in the MVDC system.
Recommended Citation
Talebzadeh, Sarah, "Large spacecraft medium voltage DC (MVDC) power and propulsion system" (2024). Electrical and Computer Engineering. 126.
https://digitalcommons.ndsu.edu/elec-comp-eng/126
Rights
NDSU policy 190.6.2
Rights Link
https://www.ndsu.edu/fileadmin/policy/190.pdf
Handle Identifier
https://hdl.handle.net/10365/33921