Thesis
Control and design of Offgrid/Standalone PV systems
Honours, Murdoch University
2023
Abstract
This thesis project aimed to develop power control schemes and individual component design for simple single-phase AC coupled and DC coupled off grid PV standalone power systems (SAPS) acting as microgrids. The focus of this thesis project was on PV to narrow the scope of the project to study and develop a unique control algorithm of renewable generation through solar maximum power point tracking (MPPT). The proposed AC microgrid consists of a PV array, grid following Solar inverter, electrical load, grid forming battery inverter and BESS. The proposed DC microgrid consists of the same components but with the inverters replaced by DC-DC converters and DC loads instead of AC loads. The mechanism and modelling of the PV modules, MPPT, charge controllers, grid following and grid forming inverters and electrical load were researched and written as a literature review. Microgrid control methods were also researched and written in the literature review. Finally, the literature review explored and discussed the effects and mitigation of motor inrush current from pumps and compressors on AC microgrids. Detailed mathematical models for the microgrid components were developed in MATLAB/Simulink. Robust controllers for microgrid components were designed to achieve grid stability. The learning outcomes of this thesis project include the technical knowledge behind the mechanisms of microgrid components and how they achieve coordinated operation. This thesis project also includes researching and developing new and forefront technologies such as power electronics, AC and DC microgrid control. A unique and new system was developed by combining these various technologies with original component designs into the AC and DC microgrid. The stability and performance of the controllers at varying PV generation, load levels and state of charge conditions of the AC and DC microgrid was examined, allowing for detailed simulation of these technologies running in conjunction, resulting in an innovative system. Therefore, this thesis project is innovative and contributes to the academic field on these topics.
Details
- Title
- Control and design of Offgrid/Standalone PV systems
- Authors/Creators
- Braiden E Robson
- Contributors
- Ali Arefi (Supervisor) - Murdoch University, Centre for Water, Energy and Waste
- Awarding Institution
- Murdoch University; Honours
- Identifiers
- 991005605569007891
- Murdoch Affiliation
- School of Engineering and Energy
- Resource Type
- Thesis
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