Three‐port DC–DC converter based on quadratic boost converter for stand‐alone PV/battery systems

Abstract

In this study, a three-port DC-DC converter is proposed based on quadratic boost converter. The proposed converter contains paths to enable the flow of power from input source to load and battery. Furthermore, it makes a path available to energise the load by the battery. The proposed converter has a bidirectional path using two additional switches and two diodes. Power flows from the input source and the battery to the load in a single-stage resulting in higher efficiency. The proposed converter has three switches and two duty cycles defined. By adjusting the duty cycles, maximum input power and output voltage can be regulated based on the input source power and the battery condition. To control the proposed converter, three operation modes are defined. In order to design the control system, the proposed converter is analysed and the small-signal models are obtained. Using a decoupling network for the integrated small-signal models, separated closed-loop controllers are designed. Finally, a prototype for the proposed converter is prepared to validate feasibility and effectiveness of the proposed converter and the control method by experimental results.

Three‐port DC‐DC converter for stand‐alone PV/battery systems with four operation modes

“…To improve performance of the sources from the point of view, energy storage (ES) should be utilized in conjunction with them. [2][3][4][5][6] Simultaneous use of renewable energy sources (RES) and ES requires two individual converters, which makes the system bulky and costly. According to the recent literatures, integration of RES and ES with noticeable advantages is possible by three-port converters (TPCs).…”

Bidirectional Quadratic Converter-Based PMBLDC Motor Drive for LEV Application

“…e converter requires a large number of power switches and imposes high voltage stress on the switches. A three-port DC-DC converter based on quadratic boost operation for stand-alone PV/battery systems is presented [19]. Recent research focuses on the modified converters because they are nonisolated (transformerless) topologies.…”

New family of transformer‐less quadratic buck‐boost converters with wide conversion ratio

“…It produces the quadratic boost gain in discharge mode, whereas it gives quadratic buck gain in charging mode. In parallel, S Rostami et al 33 proposed a three‐port dc–dc converter with a quadratic boost voltage gain. This converter will explain the power flow from the input source to load and battery; due to the integration of quadratic boost converter and energy storage systems, it is very much suitable for stand‐alone PV systems.…”