Bidirectional Buck-Boost and Series LC-Based Power Balancing Units for Photovoltaic DC Collection System

Huang, Yanhui; Liu, Fei; Zhuang, Yizhan; Diao, Xiaoguang; Liu, Zhouyang; Pan, Shangzhi; Zha, Xiaoming

doi:10.1109/jestpe.2021.3074575

Cited by 12 publications

(5 citation statements)

References 32 publications

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“…As a result, the power rate is meagre and power loss is minimal. However, due to a large number of converter circuits, it has a slow balancing speed and a high cost and bulk [34]. Te following equation calculates the inductance value of the buck-boost converter.…”

Section: Buck-boost Converter Equalisationmentioning

confidence: 99%

A Comprehensive Review of Various Topologies and Control Techniques for DC-DC Converter-Based Lithium-Ion Battery Charge Equalization

Sugumaran

Prabha

2023

International Transactions on Electrical Energy Systems

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Worldwide, electric vehicle (EV) sales are booming nowadays due to the rapid increase in the cost of fossil fuels. Lithium-ion batteries are very familiar in the EV industry because of their high energy per unit mass relative to other electric energy storage systems. To obtain the required voltage, several lithium-ion batteries are connected serially. Due to manufacturing inconsistencies, the voltage of serially connected cells is not always equal, which might result in a charge imbalance. This imbalance may reduce the battery’s life span due to the action of undercharging and overcharging. Battery charge equalisation (BCE) is challenging because it requires a constant voltage level in each cell. Various topologies and control strategies have been proposed in the past literature to build and improve the BCE. This study extracts the recently proposed DC-DC converter-based topologies for BCE. This study then gives a comparative analysis of various control strategies used in BCE and ends with implementing control strategies with BCE topology using a DC-DC converter. This study incorporates contextualised topologies used by BCE with design, operation, and applications. Extensive simulation results are provided to compare the performance of DC-DC converter-based BCE topologies in balancing speed. Also, a comprehensive comparison of various converter topologies and control strategies has been carried out for future investigation.

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Section: Buck-boost Converter Equalisationmentioning

confidence: 99%

A Comprehensive Review of Various Topologies and Control Techniques for DC-DC Converter-Based Lithium-Ion Battery Charge Equalization

Sugumaran

Prabha

2023

International Transactions on Electrical Energy Systems

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“…The research on DC collection of PV systems is becoming a hotspot in the field of PV energy [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. A modular multilevel converter (MMC) based PV system has been proposed in [4][5][6][7], where each PV array is connected to the capacitors of each submodule (SM) of the MMC through a DC-DC converter with maximum power point tracking (MPPT) control.…”

Section: Grid-connected Topology Selectionmentioning

confidence: 99%

“…In addition, there are a large number of convergence points on the LVDC bus bars of the PV base, which, in the event of a failure, would cause the entire system to shut down. References [12][13][14][15][16][17][18] proposed an input-independent and output-series (IIOS) system, where the PV arrays of different cascaded modules are relatively independent. The MVDC voltage level is achieved by using a series cascade on the output side of the DC-DC converter.…”

Section: Grid-connected Topology Selectionmentioning

confidence: 99%

“…Due to different irradiance of different areas, the output power of PV arrays fluctuates in a wide range, resulting in an inevitable voltage imbalance problem between cascaded modules in the IIOS topology. To solve the powermismatch problem, an auxiliary equalization circuit should be used, and several related studies have been proposed in [12][13][14][15][16][17][18].…”

Section: Grid-connected Topology Selectionmentioning

confidence: 99%

“…In refs. [12][13][14][15], an inter-module power balancing units (PBUs) was proposed, which are installed between adjacent SMs to eliminate the inter-module power mismatch. In refs.…”

Section: Grid-connected Topology Selectionmentioning

confidence: 99%

See 2 more Smart Citations

Studies of large‐scale DC connected photovoltaic power system based on multi‐modular cascaded DC‐DC converter

Liu

Chen

Shi

et al. 2023

IET Generation Trans & Dist

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DC collection and transmission is one of the major development directions of large‐scale photovoltaic (PV) power system. In order to achieve low‐cost, high‐efficiency and long‐distance transmission of PV power, this paper adopted a DC grid‐connected topology by using multi‐modular cascaded DC‐DC converters, forming an input‐independent and output‐series (IIOS) system. In this system, an LLC type DC‐DC converter based on IGCT and magnetically integrated transformer was proposed in this paper, which can significantly increase the capacity, efficiency and power density of DC‐DC converter. And the equalization unit based on half‐bridge topology was adopted for the case of uneven irradiation of the PV inputs. In addition, this paper proposed an equalization control method based on the Nearest Level Modulation (NLM), which greatly simplifies the design of the acquisition and control system. Furthermore, the parametric design of a 50MW PV system was presented, and the simulation was carried out to verify the feasibility and advantages of the system in this paper. The proposed IIOS system is more suitable for high‐capacity, long‐distance PV power transmission, which can serve as a reference for the development of large‐scale photovoltaic systems.

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DC Series Arc Fault Detection and Self- Extinguishing Method With Power Stage Design of Module Level Power Electronics

Park,

Kim,

Chae

2024

IEEE Access

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Bidirectional Buck-Boost and Series LC-Based Power Balancing Units for Photovoltaic DC Collection System

Cited by 12 publications

References 32 publications

A Comprehensive Review of Various Topologies and Control Techniques for DC-DC Converter-Based Lithium-Ion Battery Charge Equalization

A Comprehensive Review of Various Topologies and Control Techniques for DC-DC Converter-Based Lithium-Ion Battery Charge Equalization

Studies of large‐scale DC connected photovoltaic power system based on multi‐modular cascaded DC‐DC converter

DC Series Arc Fault Detection and Self- Extinguishing Method With Power Stage Design of Module Level Power Electronics

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