Summary of Engineering doctoral dissertation: Proposed optimal control algorithms for photovoltaic arrays reconfiguration

Thesis objectives and tasks: Establishing a mathematical model, putting forward an algorithm applied for seeking the solar systems irradiance equalization configuration under the heterogeneous lighting conditions; establishing a mathematical model, putting forward an algorithm applied for choosing an optimal circuit switching method, from the initial connection configuration to the irradiance equalization configuration.
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Summary of Engineering doctoral dissertation: Proposed optimal control algorithms for photovoltaic arrays reconfigurationMINISTRY OF EDUCATION VIETNAM ACADEMY OF SCIENCE AND TRAINING AND TECHNOLOGY GRADUATE UNIVERSITY OF SCIENCE AND TECHNOLOGY ----------------------------- Ngo Ngoc Thanh PROPOSED OPTIMAL CONTROL ALGORITHMS FOR PHOTOVOLTAIC ARRAYS RECONFIGURATION Major: Control and Automation Technology Code: 9.52.02.16 SUMMARY OF ENGINEERING DOCTORAL DISSERTATION Ha Noi – 2020This work is completed at: Graduate University of Science and Technology Vietnam Academy of Science and TechnologySupervisor: Assoc.Prof.Dr. Pham Thuong Cat Prof.Dr. Nguyen Phung QuangReviewer 1: ……………………………………………………..........................……….……………………………………………………………………………........................Reviewer 2: ………………………………………………………………........................…………………………………………………………………………............................Reviewer 3: ………………………………………………………………........................……………………………………………………………………………........................This Dissertation will be officially presented in front of the Doctoral DissertationGrading Committee, meeting at: Graduate University of Science and Technology Vietnam Academy of Science and Technology At …………. hrs ……. day ……. month……. year …….This Dissertation is available at:1. Library of Graduate University of Science and Technology2. National Library of Vietnam INTRODUCTION1. IntroductionPhotovoltaic panels during the working process in solar power plants can receiveinconsistent solar irradiance levels in many cases due to the partial shading. In the contextof partial shading, the system capacity shows a significant decrease, in addition to thephenomenon of Misleading (confusion due to the maximum power point).Development of a solar system reconfiguration strategy based on the irradiance equalizationmethod is a key area of research, whereby the solar system restructuring is the rearrangementof the connection circuitry of photovoltaic panels for the purposes of increased output powerand device protection when the solar system works in heterogeneous lighting conditions.Therefore, the topic “Proposed optimal control algorithms for photovoltaic arraysreconfiguration” was selected for this thesis to contribute to solving problems in the solarsystem reconfiguration strategy.2. Thesis objectives and tasks ✓ Establishing a mathematical model, putting forward an algorithm applied for seeking the solar systems irradiance equalization configuration under the heterogeneous lighting conditions. ✓ Establishing a mathematical model, putting forward an algorithm applied for choosing an optimal circuit switching method, from the initial connection configuration to the irradiance equalization configuration.3. Research scope ✓ Studying primary sources, connecting photovoltaic panels with the use of TCT connection circuit. ✓ Without considering constraints on equipment production costs, economic nature when putting into practice.4. New findings of the thesis ✓ Establishing the mathematical model, applying Dynamic programming (DP) algorithm and proposing Smartchoice (SC) algorithm for selecting the irradiance equalization configuration to find ways of arranging connection positions of photovoltaic panels so that optimal system power and local maximum points elimination can be achieved. ✓ Proposing the mathematical model, applying the Munkres assignment algorithm (MAA) and proposing an improved MAA for selecting the optimal circuit switching method aimed at extending the life of switching matrix in the solar system. ✓ Building a simulation toolkit on Matlab-Simulink and Micrsoft Visual Studio in order to assess the performance and accuracy of algorithms used for proving new methods of the thesis.5. Thesis structure:The thesis is broken down into 4 chapters.Chapter 1: Solar system structure and system performance improvement strategy underpartial shading conditions.Chapter 2: Introduction to the optimal control theoryChapter 3: Development of a system restructuring strategy using optimal control theoryChapter 4: Simulation and experiment 1 Chapter 1: SOLAR SYSTEM STRUCTURE AND SYSTEM PERFORMANCE IMPROVEMENT STRATEGY UNDER PARTIAL SHADING CONDITIONS.1.1 Introduction to the solar system1.1.3 Solar powerSolar power is generated from either the conversion of sunlight into electricity, or directlyby using photovoltaic panels, or indirectly through thermal energy using the concentratedsolar power.1.1.4 Photovo ...