Non-Isolated Interleaved Hybrid Boost Converter for Renewable Energy Applications

Abstract

DC-DC boost converters are necessary to extract power from solar panels. The output voltage from these panels is far lower than the utility voltage levels. One of the main functions of the boost converter is to provide a considerable step-up gain to interface the panel to the utility lines. There are several techniques used to boost the low panel voltage. Some of the issues faced by these topologies are a high duty ratio operation, complex design with multiple active switches and discontinuous input current that affects the power drawn from the panel. This paper presents a boost converter topology that combines the advantages of an interleaved structure, a voltage lift capacitor and a passive voltage multiplier network. A mathematical analysis of the proposed converter during its various modes of operation is presented. A 100 W prototype of the proposed converter is designed and tested. The prototype is controlled by a PIC16F18455 microcontroller. The converter is capable of achieving a gain of 10 without operating at extremely high duty ratios. The voltage stress of the switch is far lower than the maximum output voltage.

Two-Switch Boost Converter With Improved Voltage Gain and Degree of Freedom of Control

“…Further, a control on the inductor current is useful to control input/output currents based on the application. If the inductor current is limited by the equation I L =xI o , the following relation is obtained from (9).…”

“…The topologies for step-up DC-DC converters can be categorized as isolated and non-isolated converters [8]. Isolated converters use traditional or multi-winding transformers to achieve the necessary voltage gain and maintain isolation between input and output sides [9]- [12]. The existence of a transformer, on the other hand, necessitates a high-frequency stage and increases the total loss.…”

Improved Performance Analysis of PV Array Model Using Flower Pollination Algorithm and Gray Wolf Optimization Algorithm

“…In addition to that reconfiguration DC-DC strategy, there are 2 various methods: (i) isolated and (ii) nonisolated. Hence, solar PV MOPE is possible with nonisolated switching converter [26]. e several nonisolated DC-DC converter topologies using traditional MPP algorithms [27], as well as associated characteristics such as construction, efficiency, switching frequency, and losses, were evaluated.…”

High gain DC/DC converter with continuous input current for renewable energy applications

“…The unregulated low-level DC output voltage from these sources is considered the biggest and the most important challenge that requires to be boosted to a regulated higher level using power electronic conditioning. The power electronic interface specification is dependent not only on the renewable energy supply but also on its effects on the power-system operation 1 . To obtain the voltage step-up function, a conventional non-isolated DC/DC boost converter was used 2 because of its simple structure, simple control, and low cost.…”