Smart Energy Management For Household Prosumer
Author
Bui, Quang Trung
Term
4. term
Education
Publication year
2020
Pages
69
Abstract
This thesis examines how a household prosumer with rooftop PV and battery storage can manage energy to both increase self-consumption and lower the electricity bill. The challenge is that PV produces only during daytime while demand varies over the full day. The work formulates the control as a mixed-integer linear programming problem in MATLAB, splitting battery operation into daytime and nighttime subproblems that are treated differently to best exploit PV generation, electricity costs, and battery constraints. The thesis models the battery, PV array, and inverter with relevant parameters, I-V/P-V characteristics, and efficiencies, and defines objective functions and constraints for the energy management system (EMS1), alongside an outline of an alternative EMS formulation (EMS2). The approach is evaluated in Simulink using two load profiles, and implementation aspects via a system controller using Modbus TCP are discussed. Simulation results indicate high system efficiency and suggest potential for higher self-consumption and reduced costs for the household. Diagrams and code are provided; quantitative improvements are not reported in the available excerpt.
Dette speciale undersøger, hvordan en husholdningsprosument med solceller og batterilager kan styre energien smart for både at øge egenforbruget af PV-produktion og reducere elregningen. Udfordringen er, at solceller kun producerer om dagen, mens forbruget varierer over døgnet. Arbejdet formulerer styringen som et mixed-integer lineært optimeringsproblem i MATLAB, hvor batteriets drift opdeles i en dag- og en natperiode og behandles forskelligt for at udnytte PV-produktion, elpriser og batteriets begrænsninger bedst muligt. Specialet modellerer batteri, PV-array og inverter med relevante parametre, I-V/P-V-karakteristikker og virkningsgrader, og opstiller målfunktioner og begrænsninger for energistyringen (EMS1), samt skitserer en alternativ EMS-tilgang (EMS2). Metoden afprøves i Simulink med to forskellige belastningsprofiler, og der diskuteres implementeringsaspekter via en systemcontroller baseret på Modbus TCP. Simuleringsresultaterne indikerer høj systemeffektivitet og peger på potentiale for øget selvforbrug og lavere omkostninger for husholdningen. Der præsenteres diagrammer og kodeeksempler; kvantitative forbedringer angives ikke i det tilgængelige uddrag.
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