دانلود رایگان مقاله یک مبدل چند ورودی و چند مرحله ای مرحله به مرحله DC-DC برای کاربردهای PV – سال 2021
مشخصات مقاله:
عنوان فارسی مقاله:
یک مبدل چند چند ورودی و چند مرحله ای مرحله به مرحله DC-DC برای کاربردهای PV
عنوان انگلیسی مقاله:
A multi-input, multi-stage step-up DC-DC converter for PV applications
سال انتشار مقاله:
2021
کلمات کلیدی مقاله:
مبدل dc / dc را افزایش دهید ؛ سیستم فتوولتائیک، سوئیچینگ جریان صفر (ZCS) ؛ و دستگاه های پهن باند
مناسب برای رشته های دانشگاهی زیر:
مهندسی برق
مناسب برای گرایش های دانشگاهی زیر:
سیستم های قدرت و مهندسی الکترونیک
وضعیت مقاله انگلیسی و ترجمه:
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فهرست مطالب:
Abstract
Keywords
1. Introduction
2. The proposed multi-input converter
2.1. Circuit overview
2.2. Circuit operating principle
3. Realization of soft-switching in the proposed DC/DC converter
3.1. Soft switching
3.2. Duty ratio calculation for the purpose of soft switching
4. Efficiency analysis
4.1. Conduction losses in semiconductor devices
4.2. Conduction losses in the main capacitors
4.3. Conduction losses in the input capacitor
5. Simulation and experiment results
5.1. Simulation results
5.2. Experimental results
6. Conclusion
Declaration of Competing Interest
References
قسمتی از مقاله انگلیسی:
1. Introduction
Non-conventional energy sources such as photovoltaics (PV) and wind energy become very attractive around the world due to the environmental pollution, depletion of fossil fuels, and the increase demand of electrical energy [1]. However, these sources are not continuously available in nature, and for better utilization, a power electronics interface is required [2]. For instance, the partial shading and mismatches between PV modules have a significant impact on output power of series connected PV systems [3–5]. The step up dc-dc converters are essential part in PV energy systems [6–7]. Transformerless based dc–dc converters are widely employed to achieve high voltage gain with small size, light weight and volume resulting in system with higher efficiency and higher power density. The conventional boost dc-dc converter has several drawbacks. Due to the parasitic components of power MOSFET, diode, inductor and capacitors, the voltage gain is limited to 5 times and the system efficiency is significantly reduced [8–10]. In applications where high gain dc-dc converters are needed, isolation based dc/dc converters [11–20] will be employed. However, these converters require large transformer turns ratio in order to achieve high voltage gain. In [13], a boost-type input inductor is proposed to overcome the drawbacks of traditional isolated converter. This type provide high voltage gain with no need for large transformer turns ratio. However, the additional inductor together with the transformer will increase the size and weight of these converters. Furthermore, due to the associated leakage inductance, active snubber circuits are required to suppress the voltage spikes. The dc/dc converter-based voltage multiplier cell is proposed in [21]. The topology runs with relatively small duty ratio and multiple cells need to be connected together to achieve high voltage gain. Two types are recognized in literature, in [21–23] switched capacitor and switched inductor circuits are proposed. However, these converters require large number of switched capacitor cells and switched inductor cells to perform the energy transfer tasks and it can be considered the main drawback of these converter.
