Indirect Input-Series Output-Parallel DC–DC Full Bridge Converter System Based on Asymmetric Pulsewidth Modulation Control Strategy

Chen, Wu; Fu, Xinghe; Chenyang, Xue; Ye, Han; Syed, Waqar Azeem; Shu, Liangcai; Ning, Guangfu; Wu, Xiaodan

doi:10.1109/tpel.2018.2855205

Cited by 31 publications

(15 citation statements)

References 29 publications

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“…Therefore, the multiple modular DCSST scheme including input-series-output-parallel (ISOP), input-series-output-series (ISOS), input-parallel-output-series (IPOS) and input-parallel -output-parallel (IPOP) structures provides another scheme for MVDC and HVDC applications [19][20]. The multiple modular DCSST scheme brings distinctive features such as modular topology and control structure, flexibility of voltage and power extension and redundant operation capability, and this scheme becomes a preferred option for MVDC and HVDC applications [21][22].…”

Section: Introductionmentioning

confidence: 99%

A Hybrid Isolated Bidirectional DC/DC Solid-State Transformer for DC Distribution Network

Wang¹,

Yang

Wu³

et al. 2021

IEEE Access

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Section: Introductionmentioning

confidence: 99%

A Hybrid Isolated Bidirectional DC/DC Solid-State Transformer for DC Distribution Network

Wang¹,

Yang

Wu³

et al. 2021

IEEE Access

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“…Energies 2020, 13, 1114 2 of 15 For IVS and OCS, various control methods, from simple to complex ones, have been proposed for power sharing in ISOP converters [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. A control method using common duty-ratio control has been implemented without any additional control loops [8,9].…”

Section: Introductionmentioning

confidence: 99%

Decentralized Control Method of ISOP Converter for Input Voltage Sharing and Output Current Sharing in Current Control Loop

Kim

Park

et al. 2020

Energies

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Input-Series-Output-Parallel (ISOP) converters, a kind of modular converter, are used in high-input voltage and high-output current applications. In ISOP converters, Input Voltage Sharing (IVS) and Output Current Sharing (OCS) should be implemented for stable operation. In order to solve this problem, this paper proposes a decentralized control method. In the proposed control, output current reference is changed according to the decentralized control characteristic in individual current control loops. In this way, the proposed control method is able to implement IVS and OCS without communication. Also, this method can be easily used in current control loops and has high reliability compared to conventional control methods that require communication. In this paper, the operation principle is described to elucidate the proposed control and a small signal model of an ISOP converter is also implemented. Based on the small signal model, IVS stability analysis is performed using pole-zero maps with varying coefficients and control gains. In addition, the current control loop is designed in a stable region. In order to demonstrate the proposed control method, a prototype ISOP converter is configured using full-bridge converters. The performance of IVS and OCS in an ISOP converter is verified by experimental result.

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“…In the recent years, many studies have been done in the field of series-parallel DC-DC conversion systems. Among these studies, several schemes have been presented to control the ISOP system, that these control schemes can be classified into two categories: (i) natural power balance scheme [6][7][8][9][10][11], (ii) specific sharing control scheme to achieve power balance [12][13][14][15][16][17][18][19][20][21][22][23][24]. With direct control of duty cycle, there is no need of IVS and OCS control loops for the ISOP and ISOS system [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…These natural power balance schemes have many limitations and poor characteristics of voltage and current sharing. According to the input and/or output side of the sharing loops, the special sharing control schemes can be classified into three categories: (i) the input side sharing control scheme [12][13][14][15][16][17][18], (ii) the output side sharing control scheme [19][20][21][22][23] and (iii) both of the input and output sides sharing control scheme [24]. A master-slave control scheme proposed in [12] can achieve IVS well, but the control scheme is not fault tolerant and decreases the efficiency due to sensing high input voltages with resistors.…”

Section: Introductionmentioning

confidence: 99%

“…In the ISOP and the ISOS systems, the IVS control scheme has well dynamic characteristics than the output side sharing control scheme [13, 14]. In [15], an indirect input‐series output‐parallel (I 2 SOP) DC–DC full‐bridge converter system based on asymmetric pulse‐width modulation (PWM) control strategy is proposed for high input‐voltage applications, in which the I 2 SOP structure is a very simple approach with almost no additional device and component. The model predictive control is a well alternative to the classical PID control due to its simplicity and fast dynamic response [17].…”

Section: Introductionmentioning

confidence: 99%

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Comprehensive sharing control strategy for input‐series output‐parallel connected modular DC–DC converters

Abrehdari

Sarvi

2019

IET Power Electronics

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The systems consisting of multiple DC-DC converters with input-series output-parallel (ISOP) connection are widely used in high-power applications. In the ISOP connection, the total input voltage and output current should be divided equally between the converters. However, in order to achieve this purpose, a proper control scheme should be used. This study proposes two control schemes: (i) output current feedback (OCF) and (ii) input voltage feedback (IVF). Based on the power balance, in the IVF scheme, the total output current, and in the OCF scheme, the total input voltage are divided automatically between the converters, and there is no need to use an extra control loop. The IVF and the OCF control schemes consist of two control loops: a common output voltage regulator (OVR) loop and individual input voltage sharing loops in the IVF scheme or individual output current sharing loops in the OCF scheme. The proposed control scheme can effectively improve the stability and dynamic characteristics of system. Finally, both the results of the simulation and laboratory prototype of an ISOP system consisting two forward converters have verified the performance of the IVF and OCF control schemes.

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Indirect Input-Series Output-Parallel DC–DC Full Bridge Converter System Based on Asymmetric Pulsewidth Modulation Control Strategy

Cited by 31 publications

References 29 publications

A Hybrid Isolated Bidirectional DC/DC Solid-State Transformer for DC Distribution Network

A Hybrid Isolated Bidirectional DC/DC Solid-State Transformer for DC Distribution Network

Decentralized Control Method of ISOP Converter for Input Voltage Sharing and Output Current Sharing in Current Control Loop

Comprehensive sharing control strategy for input‐series output‐parallel connected modular DC–DC converters

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