A New Control Method for Triple-Active Bridge Converter with Feed Forward Control

Ohno, Takanobu; Hoshi, Nobukazu

doi:10.23919/ipec.2018.8507780

Cited by 9 publications

(6 citation statements)

References 10 publications

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“…Unfortunately, when applied to more advanced modulation techniques with more degrees of freedom, time-domain analysis becomes extremely complicated. To overcome this, fundamental component analysis (FCA) has been proposed to simplify the steady-state design, ZVS criteria investigation, and optimization of the MAB converter [3,65,[111][112][113]. However, higher-order harmonics of the square wave voltages and inductor currents are not taken into account which may lead to significant inaccuracy, especially with small phase shifts and/or small duty cycles that yield AC voltages rich in higher odd-order harmonics.…”

Section: Non-linear Controlmentioning

confidence: 99%

“…Taking only the first harmonic into account considerably reduces the computational effort of steady-state analysis and, consequently, many papers consider only fundamental frequency analysis (FCA) [3,65,[111][112][113]. The FCA can be imprecise since the higher oddorder components of the waveforms are not taken into account for power flow calculation (and the error can be considerable in some conditions), thus, its use is mostly limited to resonant-type MAB converters.…”

Section: Modelling Approaches To Derive Power Flow Relationshipsmentioning

confidence: 99%

“…With step changes in the system (load, or set point), a step change in the operating point occurs as well, and the gain scheduling may not achieve the desired decoupling performance. The proposed method in [111] neglects pre-calculation of the decoupling terms and their dependency on the operating point. Consequently, based on the reported experimental tests, this method is not always totally effective in terms of decoupling and robustness to disturbances.…”

Section: Other Linear Control Approaches For Decouplingmentioning

confidence: 99%

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A Survey on Multi-Active Bridge DC-DC Converters: Power Flow Decoupling Techniques, Applications, and Challenges

et al. 2023

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Multi-port DC-DC converters are a promising solution for a wide range of applications involving multiple DC sources, storage elements, and loads. Multi-active bridge (MAB) converters have attracted the interest of researchers over the past two decades due to their potential advantages such as high power density, high transfer ratio, and galvanic isolation, for example, compared to other solutions. However, the coupled power flow nature of MAB converters makes their control implementation difficult, and due to the multi-input, multi-output (MIMO) structure of their control systems, a decoupling control strategy must be designed. Various control and topology-level strategies are proposed to mitigate the coupling effect. This paper discusses the operating principles, applications, methods for analyzing power flow, advanced modulation techniques, and small signal modelling of the MAB converter. Having explained the origin of cross-coupling, the existing power flow decoupling methods are reviewed, categorized, and compared in terms of effectiveness and implementation complexity.

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Section: Non-linear Controlmentioning

confidence: 99%

Section: Modelling Approaches To Derive Power Flow Relationshipsmentioning

confidence: 99%

Section: Other Linear Control Approaches For Decouplingmentioning

confidence: 99%

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A Survey on Multi-Active Bridge DC-DC Converters: Power Flow Decoupling Techniques, Applications, and Challenges

et al. 2023

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“…Power tracking control was achieved by applying proportional-integral (PI) control to this conventional control model [12]. In addition, improvements in the control response using a feed-forward compensator are addressed for a voltage-fed type TAB converter [13], [14]. As for the current-fed type TAB converter, state feedback using the state-space averaging method was applied [15].…”

Section: Introductionmentioning

confidence: 99%

Current Tracking Control of Triple Active Bridge DC/DC Converter Under Varying DC-Bus Voltage Conditions

Ohno

Hoshi

2022

IEEE Open J. Power Electron.

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A triple active bridge (TAB) converter consisting of three full-bridge inverters and a threewinding transformer has been researched to improve its power conversion performance as a bi-directional isolated multiport converter. Previous research established a current control method using a decoupling system to solve the complex power transmission structure of the TAB converter. However, it is challenging to integrate voltage factors into the decoupling system because DC-bus voltages of the TAB converter are assumed to be constant. Active bridge control against voltage variations has become essential to achieving high-performance DC/DC power conversion systems using high-frequency transformers such as a TAB converter. This paper proposes a TAB converter control method, which is an expansion of the conventional method, to integrate the DC-bus voltage variation into the control model. Model predictive control is used to achieve tracking control by incorporating voltage variation factors into the control method using an established model structure as a basis for predictive calculations. Simulations were conducted to verify that the proposed method improves the output responses compared to the conventional methods when the DC-bus voltages change. Also, experiments using a prototype converter show that the proposed control method can achieve current tracking control during the voltage variation.INDEX TERMS Bi-directional power flow, control design, DC-DC power converters, power control.

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“…A feedforward compensator based control method is proposed in [11], which decouples the control loops dynamically with pre-calculated gains stored as a look-up table in the controller. This approach is improved with feedforward control in [12] or reformulated using conjugated variables in [13]. Another control technique decouples the control loops by choosing different bandwidths for the single-input single-output (SISO) loops [14].…”

Section: Introductionmentioning

confidence: 99%

Power Flow Decoupling Controller for Triple Active Bridge Based on Fourier Decomposition of Transformer Currents

Purgat

Bandyopadhyay

Qin

et al. 2020

2020 IEEE Applied Power Electronics Conference and Exposition (APEC)

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This paper proposes a power flows decoupling controller for the triple active bridge converter. The controller is based on a full-order continuous-time model of the TAB converter derived using the generalized average modelling (GAM) technique. GAM uses the Fourier series expansion to decompose the state-space variables into two components, which represent the active power and the reactive power. The controller uses the active power components of the transformer currents to decouple the active power flows between converter ports. Additionally, the implementation of the decoupling controller in the digital domain is detailed in the paper. The decoupling performance of the proposed controller is validated in a hardware experiment.

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A New Control Method for Triple-Active Bridge Converter with Feed Forward Control

Cited by 9 publications

References 10 publications

A Survey on Multi-Active Bridge DC-DC Converters: Power Flow Decoupling Techniques, Applications, and Challenges

A Survey on Multi-Active Bridge DC-DC Converters: Power Flow Decoupling Techniques, Applications, and Challenges

Current Tracking Control of Triple Active Bridge DC/DC Converter Under Varying DC-Bus Voltage Conditions

Power Flow Decoupling Controller for Triple Active Bridge Based on Fourier Decomposition of Transformer Currents

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