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Dissertation Defence: Novel Inverter Topologies for Photovoltaic Applications
August 1 at 9:00 am - 1:00 pm
Yun Lu, supervised by Dr. Wilson Eberle, will defend their dissertation titled “Novel Inverter Topologies for Photovoltaic Applications” in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Electrical Engineering.
An abstract for Yun Lu’s dissertation is included below.
Examinations are open to all members of the campus community as well as the general public. Please email wilson.eberle@ubc.ca to receive the Zoom link for this defence.
ABSTRACT
Six novel single-stage single-phase buck-boost inverters are proposed in this thesis. The inverters that are introduced can accept a wide input voltage range and can provide a large variation in output voltage. In addition, the leakage current is negligible in five of the proposed inverters which makes these inverters suited for photovoltaic applications. The novel topologies are simple in structure and operation, requiring from four to six switches and just a single inductor. Moreover, in all the proposed inverters, the majority of the switches are driven at line frequency which results in negligible switching loss. Furthermore, synchronous switching is applied to some of the high-frequency switches to further reduce power loss. Consequently, high efficiency can be achieved. This thesis includes detailed operation and circuit analysis for the switching modes for all the proposed inverters. In addition, the inverters’ design method and components’ parameters are examined in detail. Hardware prototypes were fabricated to verify the proposed topologies with the operating parameters of 120 Vrms/ 60 Hz. The experimental results verify the operation and theoretical analysis of the proposed inverters.
