A Four-port DC-DC Converter for a Standalone Wind and Solar Energy System

Zeng, Jianwu; Ning, Jiahong; Du, Xia; Kim, Taesic; Yang, Zhaoxia; Winstead, Vincent

doi:10.1109/tia.2019.2948125

Cited by 26 publications

(16 citation statements)

References 17 publications

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“…For hybrid systems, there has been recent interest in revisiting multiport DC/DC converters to share power electronics components, simplify operational logics, and develop compact/efficient architectures. For an isolated application, Zeng et al (2019) present a four-port DC/DC converter that can handle wind, PV, battery storage, and loads (see Figure 5). The authors claim that their multiport converter has the advantage of using a simple topology to interface with sources of different voltage/current characteristics.…”

Section: Dc-coupled Wind-storage Hybrid Systemmentioning

confidence: 99%

Hybrid Distributed Wind and Battery Energy Storage Systems

Reilly¹,

Poudel²,

Krishnan³

et al. 2022

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For individuals, businesses, and communities seeking to improve system resilience, power quality, reliability, and flexibility, distributed wind can provide an affordable, accessible, and compatible renewable energy resource. Distributed wind assets are often installed to offset retail power costs or secure long term power cost certainty, support grid operations and local loads, and electrify remote locations not connected to a centralized grid. However, there are technical barriers to fully realizing these benefits with wind alone. Many of these technical barriers can be overcome by the hybridization of distributed wind assets, particularly with storage technologies. Electricity storage can shift wind energy from periods of low demand to peak times, to smooth fluctuations in output, and to provide resilience services during periods of low resource adequacy.Although interconnecting and coordinating wind energy and energy storage is not a new concept, the strategy has many benefits and integration considerations that have not been welldocumented in distribution applications. Thus, the goal of this report is to promote understanding of the technologies involved in wind-storage hybrid systems and to determine the optimal strategies for integrating these technologies into a distributed system that provides primary energy as well as grid support services. This document achieves this goal by providing a comprehensive overview of the state-of-the-art for wind-storage hybrid systems, particularly in distributed wind applications, to enable distributed wind system stakeholders to realize the maximum benefits of their system. As battery costs continue to decrease and efficiency continues to increase, an enhanced understanding of distributed-wind-storage hybrid systems in the context of evolving technology, regulations, and market structure can help accelerate these trends. vi This report is available at no cost from the National Renewable Energy Laboratory at www.nrel.gov/publications.

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Section: Dc-coupled Wind-storage Hybrid Systemmentioning

confidence: 99%

Hybrid Distributed Wind and Battery Energy Storage Systems

Reilly¹,

Poudel²,

Krishnan³

et al. 2022

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“…The capacitor design is based on the normalised voltage ripple across capacitors C 1 , C , and C 2 and is given in (12) for the output mode and in (13) for the input mode. In order to ensure minimum ripple at any instant of operation, the maximum value of capacitance among the two modes is selected.…”

Section: Design Of the Mpcmentioning

confidence: 99%

“…A TPC with two DC output voltages having step-up and step-down outputs is reported in reference [12]. A four port converter, with two input ports and a high voltage load port along with a bidirectional battery port, is discussed in reference [13]. The high voltage at the load port is obtained using a coupled inductor and a transformer.…”

Section: Introductionmentioning

confidence: 99%

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A non‐isolated bidirectional high gain integrated multiport converter for grid tied solar PV fed telecom load

Sheeja

Kalpana

Singh

et al. 2022

IET Power Electronics

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A multiport converter (MPC) with a non-isolated high gain bidirectional port is proposed for the grid integration of solar photovoltaic array (SPA) fed telecommunication load. The SPA along with a battery energy storage (BES) meets the power demand of the telecom DC load and the excess/deficit power is exchanged with AC grid. The MPC feeds the DC link of a voltage source converter for bidirectional operation with the AC grid. The small signal analysis of the converter shows that its operation is stable. The SPA, BES, and telecommunication load are rated for lower voltages, consecutively reducing the complexity with series-connected SPA. The proposed MPC possesses the merits of high voltage gain, reduced inductor size, and reduced number of components. Moreover, a power flow management algorithm is devised for the proposed converter that regulates the DC voltage at the telecom load and ensures smooth power flow control among various ports. The MPC is able to operate at various modes by controlling the ports independently. The converter performance during steady state and dynamic operating conditions under various modes are analyzed with detailed simulation studies. An experimental prototype is developed and test results are demonstrated to prove the viability of the designed converter.

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“…DC power converter-based control can integrate/sum generations from all variable renewable energies (VREs) and utilize a single point of DC/AC conversion along with a smart inverter function. An example of such capabilities was demonstrated recently (Zeng et al 2019) with a four-port DC-DC converter for a stand-alone wind and solar PV system. An important aspect of such a converter is that it may maintain a constant DC-link voltage even with the variable nature of renewable energy generators.…”

Section: Cross-technology Learningmentioning

confidence: 99%