Abstract
This article presents a high-gain DC-to-DC converter with a single switch, called the cubic converter, which provides very high voltage gain compared to the existing topologies such as the quadratic converter and conventional boost converter. The operation of the proposed converter at a lower duty ratio ensures lesser conduction losses. Various mathematical approaches are employed to confirm the higher voltage gain and improved efficiency of the converter. The proposed cubic boost converter (CBC) is compared with the quadratic boost converter (QBC) and other converters discussed in the literature. A generalized nth-order boost converter is also derived. To test the effectiveness of the QBC and CBC circuits, the Hardware-In-the-Loop (HIL) validation is performed using Typhoon HIL 402 real-time emulator machine. Moreover, the proposed topology is tested and compared with other topologies for maximum power point tracking (MPPT) of a solar photovoltaic (PV) array to show its effectiveness in a real-world scenario. A detailed comparison between conventional boost, QBC and CBC is presented for dynamic partial shading conditions in real-time mode using Typhoon HIL 402 real-time emulator machine.
Highlights
Power electronic converters play an important role in the field of renewable energy because they provide an interface between renewable energy sources and the electrical power system
The proposed topology is compared with the quadratic boost converter in terms of output gain values with and without the effect of internal resistance of inductors using a voltage versus duty ratio (V-D) graph
The voltage drop across each inductor as a percentage of output voltage depends on the load resistance, internal resistance as well as on the duty ratio
Summary
Power electronic converters play an important role in the field of renewable energy because they provide an interface between renewable energy sources and the electrical power system. It had the capability of working as a boost converter and with significantly reduced current ripples at the input and the much lower voltage stress on the semiconductors [15] It achieved a voltage gain only twice that of a conventional boost converter which was not sufficient for most of the large voltage applications thereby causing the high duty ratio problem [15]. They were constructed by joining two boost converters in series These converters, expensive, were able to provide very high voltage gains at the output at lower duty ratio values when compared with the conventional ones [25], [26]. The proposed topology is compared with the quadratic boost converter in terms of output gain values with and without the effect of internal resistance of inductors using a voltage versus duty ratio (V-D) graph.
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