Design and Optimization of CLLC Converter Enabling Highly-Efficient Partial Power Processing for Solar PV Applications

Inhalt:
A partial power processing has been actively researched as the rising technology for the MPPT DC/DC converter in solar PV application. In this work a design and optimization of CLLC converter enabling Highly-Efficient partial power processing for Solar PV Applications is proposed. The proposed converter consists of two stages: a full bridge (FB) stage and a CLLC converter stage. The combination of two stages give the converter to process partial power of the input power. The core idea of the proposal is the use of a CLLC converter which acts on the floating partial voltage condition with the following goals: i) allow MPPT operation for flexible input PV panels voltage level, and ii) optimize the overall efficiency. In this paper, the precise CLLC model based on operation mode analysis (OMA) is presented. Moreover, a control strategy based on the derived time domain description will be formulated and implemented. The control of the proposed converter will be verified by the reduced power laboratory setup. Furthermore, the efficiency measurement of the prototype is also followed with the reduced power experimental setup.