Voltage/frequency restorations for global power sharing controlled hybrid AC/DC microgrids
With the shortage of energy and environmental pollution problems, the active utilization of the renewable energy has caught much attention of the world. Distributed generation converts energy including renewable energy into electricity and accesses distribution network systems. It is an effective...
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| Format: | Theses and Dissertations |
| Language: | English |
| Published: |
2018
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| Online Access: | http://hdl.handle.net/10356/75967 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | With the shortage of energy and environmental pollution problems, the active utilization
of the renewable energy has caught much attention of the world. Distributed generation
converts energy including renewable energy into electricity and accesses distribution
network systems. It is an effective form of new energy use. The microgrid is a controllable
intelligent power distribution system, which provides a technical method for the largescale
distribution of distributed power to the distribution system and the efficient use of
new energy and renewable energy. The distributed power supplied in the microgrid is
integrated into the microgrid system through power electronic devices. Therefore, the
control of the power electronic devices in the distributed power system supplies gives full
play to the flexibility of the microgrid power transmission and ensures the microgrid
operated in a stable state.
The dissertation mainly studies the voltage/frequency restorations for global power
sharing controlled hybrid AC/DC microgrids. Converters including boost converter and
bi-directional AC/DC converter are studied on the basis of analyzing these converters’
structure, thus we establish the mathematical model of converters. Then, we model the
hybrid AC/DC microgrid from AC sub-grid and DC sub-grid and use MATLAB/Simulink
to do the modeling. Last, we research the secondary control after the droop control. And
use MATLAB/Simulink to do the comparison between the two operation states to verify
the success and reliability of the secondary control. |
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