Dongyuan Qiu

About Dongyuan Qiu

Dongyuan Qiu, With an exceptional h-index of 30 and a recent h-index of 21 (since 2020), a distinguished researcher at South China University of Technology, specializes in the field of Power Electronics.

His recent articles reflect a diverse array of research interests and contributions to the field:

Adaptive Logarithmic State Feedback Control With Quasi One-Switching-Cycle Response Characteristic for Three-Phase Inverter

Modeling and Nonlinear Dynamic Analysis of a Photovoltaic System with Multiple Parallel Branches Based on Simplified Discrete Time Model

Switched Active Power Control of Grid-Connected Inverter With Reduced RoCoF and Frequency Overshoot

A Robust Parity-Time-Symmetric Hybrid Wireless Power Transfer System with Extended Coupling Range

H‐infinity loop shaping control of wireless power transfer system based on generalized state space averaging model

Projection value-based smooth adaptive control strategy of single-phase DC-AC converters

Dynamic Modeling and Control Design Based on Singular Perturbation Theory for High-Order Wireless Power Transfer System

Design and analysis of electric spring based on battery-less current-source inverter

Dongyuan Qiu Information

University

South China University of Technology

Position

___

Citations(all)

3506

Citations(since 2020)

2164

Cited By

2437

hIndex(all)

30

hIndex(since 2020)

21

i10Index(all)

83

i10Index(since 2020)

44

Email

University Profile Page

South China University of Technology

Dongyuan Qiu Skills & Research Interests

Power Electronics

Top articles of Dongyuan Qiu

Adaptive Logarithmic State Feedback Control With Quasi One-Switching-Cycle Response Characteristic for Three-Phase Inverter

Authors

Wen-Xun Xiao,Guang-Rui Jiang,Jian-Kun Mao,Fan Xie,Bo Zhang,Dong-yuan Qiu,Yan-feng Chen

Journal

IEEE Transactions on Circuits and Systems II: Express Briefs

Published Date

2024/1/12

It is very challenging to improve the dynamic response speed and stability of digital control system, due to the inherent defects of digital controller such as quantization effect and delay in sampling step. This paper proposes an adaptive logarithmic state feedback control (ALSFC) for three-phase grid-tied and off-grid inverters which can be specially applied in digital control system. In the state feedback control system, the feedback coefficient is designed as adaptive logarithmic function of the difference value between the actual state variable and the reference, so as to make the closed-loop system converge to new equilibrium point after about one switching cycle. Comparative experiments verify that the proposed control, carried out by digital controller, has the dynamic response characteristics of quasi one-switching-cycle with its response speed is significantly higher than that of PI control, and has good stability with …

Modeling and Nonlinear Dynamic Analysis of a Photovoltaic System with Multiple Parallel Branches Based on Simplified Discrete Time Model

Authors

Xinyue Geng,Bo Zhang,Dongyuan Qiu,Yanfeng Chen,Wenxun Xiao,Fan Xie

Journal

IEEE Transactions on Power Electronics

Published Date

2024/4/15

The widely used DC distribution system mainly based on new energy generation consists of multiple power electronic converters in series and parallel. The mutual coupling among these converters can lead to complex nonlinear behavior. It is necessary to build a more accurate mathematical model for identifying a more comprehensive nonlinear behavior of this kind of high-order complex system. Therefore, a double-branch parallel photovoltaic system is taken as the research object in this paper, and carries out accurate modeling and nonlinear dynamic analysis of the system. Firstly, the influence of environmental factors on the output characteristic of the system is considered when modeling the photovoltaic generator. Secondly, the simplified discrete-time model is introduced in the dynamic model, which not only simplifies the calculation process, but also ensures the accuracy of the calculation results, and is …

Switched Active Power Control of Grid-Connected Inverter With Reduced RoCoF and Frequency Overshoot

Authors

Yuan Chen,Bo Zhang,Dongyuan Qiu,Yanfeng Chen,Fan Xie,Huadong Sun

Journal

IEEE Transactions on Power Electronics

Published Date

2024/1/4

In this article, a switched active power control of the grid-connected inverter is proposed. First, the principle of the proposed control is demonstrated with the phase trajectory analysis. The proposed control allows for direct adjustment of the maximum rate of change of frequency (RoCoF) and frequency overshoot of the inverter, thereby enhancing the frequency stability. Next, the stability of the proposed control is examined using the Lyapunov function. For the active power control loop of the inverter, the proposed control has been proven to ensure global asymptotic stability. Then, the parameters of the proposed control are designed. Due to the clear physical meaning, the proposed control allows for explicit derivation of the relationships among RoCoF, frequency overshoot, response time, and active power overshoot of the inverter. Therefore, the controller parameters can be directly designed using the derived …

A Robust Parity-Time-Symmetric Hybrid Wireless Power Transfer System with Extended Coupling Range

Authors

Dongyuan Qiu,Hao Chen,Wenchao Gu,Bo Zhang,Yanfeng Chen,Xiao Wenxun,Fan Xie

Published Date

2024/3/9

Inductive wireless power transfer (IPT) and capacitive wireless power transfer (CPT) are currently the two main wireless power transfer technologies. Combining the coils of the IPT with the plates of the CPT creates a hybrid wireless power transfer (HPT) system, which can improve the transmission performance but introduces higher parameter sensitivity. Therefore, achieving stable output power and constant transfer efficiency over a wide range of coupling coefficient variations is still a major challenge for HPT. In this work, the parity-time (PT) symmetry theory is applied to an SS-type HPT system, and a circuit model of the PT-based HPT system is developed by using coupling capacitance and coupling inductance. The effect of connecting the plates to the homonymous end or heteronymous end of the coupling coils on the PT-symmetry range of the HPT system is discussed. It is found that the heteronymous end connection of the coils can effectively increase the range of constant output power and stable transfer efficiency. Finally, a prototype is built to verify the feasibility and effectiveness of the proposed PT-based HPT system. The transfer efficiency remains constant in the PT-symmetric range, and the inductive and capacitive coupling coefficients are smaller compared to IPT and CPT systems with the same parameters.

H‐infinity loop shaping control of wireless power transfer system based on generalized state space averaging model

Authors

Zheren Tang,Wenxun Xiao,Bo Zhang,Dongyuan Qiu,Fan Xie,Yanfeng Chen

Journal

International Journal of Circuit Theory and Applications

Published Date

2024/1

The transmission distance and the output load of wireless power transfer (WPT) system are particularly prone to change, which results in higher requirements for the robustness and dynamic performance of the control. In order to reduce the influence of these characteristics, an H∞ loop shaping controller based on generalized state space averaging (GSSA) method is proposed in this paper. Based on the GSSA model, an appropriate compensation function is constructed for the WPT system to the target loop transfer function. The nominal coprime factorization of WPT system is carried out, and on this basis, H∞ controller is achieved by Riccati equation to minimize the infinite norm from disturbance to error output. The designed controller meets the requirements of robust. Furthermore, the obtained high‐order controller is discretized by a reasonable discretization method, and the details and limitations of its practical …

Projection value-based smooth adaptive control strategy of single-phase DC-AC converters

Authors

Wenxun Xiao,Huiting Huang,Jiankun Mao,Fan Xie,Bo Zhang,Yanfeng Chen,Dongyuan Qiu

Journal

Journal of Power Electronics

Published Date

2024/2/23

State-space modeling is often used to design power converters so that the performance of the closed-loop control system can meet design requirements. However, single-phase DC-AC converters based on constant state feedback control have some issues, including long response times and unpredictable robustness. To solve these problems, a novel control strategy based on state feedback control (SFC), called the smooth projection adaptive strategy (SPAS), is developed by adaptively changing the state feedback coefficient according to the projection value of the system. First, a state space model of the DC-AC converter with the adaptive state feedback control law is established. Then based on the SPAS and considering parameters perturbation, two control laws named current-mode control (CMC) and voltage-mode control (VMC) are proposed, and their robustness are further discussed. Furthermore, the …

Dynamic Modeling and Control Design Based on Singular Perturbation Theory for High-Order Wireless Power Transfer System

Authors

Wenxun Xiao,Xinyu Huang,Jialin Luo,Bo Zhang,Dongyuan Qiu,Yanfeng Chen,Fan Xie

Journal

IEEE Transactions on Industrial Informatics

Published Date

2024/2/16

Dynamic performance analysis and controller design of wireless power transfer (WPT) systems have always been tough problems because the existing dynamic models of WPT systems have disadvantages, such as high order, incompleteness, and lack of intuition. In this article, a dynamic modeling method based on a singular perturbation theory for a high-order WPT system with a Cuk-based bridgeless rectifier at the receiving side is proposed, which overcomes the disadvantages of the dynamic models mentioned above. In terms of time-scale separation characteristics brought by singular perturbation, a reduced-order model can be derived from the original high-order WPT system model. The proposed model is able to completely present the dynamic behaviors of the whole WPT system precisely. Also, a closed-loop control design method based on the reduced-order model is presented, which greatly simplifies …

Design and analysis of electric spring based on battery-less current-source inverter

Authors

Yumin He,Tingyun Gu,Bowen Li,Yu Wang,Dongyuan Qiu,Yang Zhang,Peicheng Qiu

Journal

COMPEL-The international journal for computation and mathematics in electrical and electronic engineering

Published Date

2024/2/15

PurposeElectric spring (ES) is a demand response method that can stabilize the voltage of critical loads and improve power quality, especially in a weak power grid with a high proportion of renewable energy sources. Most of existing ESs are implemented by voltage-source inverter (VSI), which has some shortcomings. For example, the DC-link capacitor limits the service life of ES, and the battery is costly and hard to recycle. Besides, conventional VSI cannot boost the voltage, which limits the application of ES in high-voltage occasions. This study aims to propose a novel scheme of ES to solve the above problems.Design/methodology/approachIn this work, an ES topology based on current-source inverter (CSI) without a battery is presented, and a direct current control strategy is proposed. The operating principles, voltage regulation range and parameter design of the proposed ES are discussed in detail.Findings …

Sneak circuit analysis based performance optimization for ZVT PWM boost converters

Authors

Min Li,Bo Zhang,Dongyuan Qiu,Aimin Miao

Journal

Journal of Power Electronics

Published Date

2024/4/16

The mechanism of a ZVT PWM boost converter is analyzed in detail in this study. In addition, the comprehensive parasitic parameters are taken into consideration. It is discovered that some unexpected modes, referred to as sneak circuit modes, occur during the operation of the converter, when certain excitation conditions are applied. Parasitic parameters and dynamic sneak paths impact the converter operating performance, causing both positive and negative effects. The effects of sneak circuits and excitation conditions are analyzed so that those with negative effects can be eliminated, and those with positive effects can be utilized. In contrast to previous works, sneak circuit phenomena are utilized to optimize the converter performance. Furthermore, parasitic circuit elements are identified and quantitatively determined to estimate their impact on the switching performance of the converter. Combining parameter …

Nonlinear model and characteristic analysis of fractional-order high frequency oscillator

Authors

Yixuan Li,Yanfeng Chen,Fan Xie,Bo Zhang,Dongyuan Qiu,Chao Cheng

Journal

AEU-International Journal of Electronics and Communications

Published Date

2023/6/1

Recently, fractional calculus theory has been widely used in various fields, including the design of oscillators. However, there are still some issues that need to be studied in depth. Firstly, it is necessary to classify the fractional-order oscillators according to the properties of the frequency selective network components, and analyze the influence of the fractional order of components on the characteristics of different types of fractional-order oscillators. Secondly, for fractional-order oscillators with nonlinear devices such as transistors, the traditional linear models cannot describe them accurately. Thirdly, due to the complexity of fractional differential equation, it is difficult to obtain the general analytical solution of the fractional-order oscillator. For these reasons, this paper takes the fractional-order capacitive feedback LC oscillator as an example, and establishes a nonlinear model of this oscillator based on the transistor …

Very-High-Frequency Resonant Dual-Channel LED Driver with Capacitive Current Balance and Low Voltage Stress on Diodes

Authors

Shikai Chen,Yanfeng Chen,Bo Zhang,Dongyuan Qiu

Journal

IEEE Transactions on Power Electronics

Published Date

2023/9/13

By combining the existing very-high-frequency (VHF) dc/dc converter and resonant switched capacitor (SC) techniques, this article proposes a VHF dual-channel light-emitting diode (LED) driver with capacitive current balance. Unlike the conventional capacitive current-balancing LED drivers, the proposed one has higher power density, and no current spike occurred at the switching moment. Due to the problem of higher voltage stress on the diode in resonant operation for the existing VHF LED drivers, the proposed one makes both diodes that are alternately turned on clamp to each other by extending one more LED channel without adding any resonant components. As a result, the voltage stress on diode can be reduced to the total dc output voltage, which is beneficial for selecting switching components. In addition, the parasitic capacitance of both diodes can be a part of the required capacitor regardless of …

Technology of Evaluating Mutual Inductance and Load Resistance Based on Primary Side Information for Wireless Power Transfer Systems

Authors

Jiahao Zhao,Wenxun Xiao,Zheren Tang,Bo Zhang,Dongyuan Qiu,Fan Xie,Yanfeng Chen

Published Date

2023/11/10

Real time and rapid acquisition of mutual inductance and load values can help improve the precise control of wireless power transfer systems. Therefore, an estimation method of mutual inductance and load without communication between primary and secondary is proposed in the paper. Firstly, the relationships between mutual inductance and load and primary electrical parameters are established, and then a method of estimating mutual inductance and load solely based on primary electrical information is designed. Finally, simulation and experiment are carried out to verify the error of estimation can be converged.

A Time-varying Amplitude and Frequency Description Method of Instantaneous Signal in Power System Based on HHT

Authors

Yuhang Yang,Yanfeng Chen,Bo Zhang,Fan Xie,Dongyuan Qiu

Published Date

2023/5/12

With the increasing proportion of power electronic equipment in the power system, the dynamic characteristics of power system have undergone significant changes. In order to analyze the power system more accurately, it is necessary to select appropriate theories to describe the instantaneous signal. When the power system is in the dynamic state, the amplitude and frequency of voltage and current are constantly changing. Based on this, some researchers put forward the concept of time-varying amplitude and frequency signals, which use instantaneous amplitude and instantaneous frequency to describe the relevant electrical quantities, and regard the dynamic process of power system as the modulating process of amplitude and frequency, rather than the traditional superimposed harmonics on the steady-state component. The specific expressions of instantaneous amplitude and instantaneous frequency based …

A Unified Frequency Domain Model of Analog and Digital PWM DC-DC Converter Considering PWM Delay

Authors

Yuan Chen,Bo Zhang,Dongyuan Qiu,Fan Xie

Journal

IEEE Transactions on Power Electronics

Published Date

2023/9/7

In this article, the effect of the pulsewidth-modulation (PWM) delay on the stability of PWM dc–dc converters is analyzed. First, a unified frequency-domain model considering the PWM delay is proposed. Based on the proposed model, the physical mechanism of the PWM delay is the sampling characteristic of the modulation process rather than the digital controller. As the analog PWM (APWM) and digital PWM (DPWM) converters both have the modulation process, they both have the PWM delay. Then, the different stabilities of APWM and DPWM converters are compared, which are caused by the state feedback introduced by the output ripple in the APWM converter. As these differences are not caused by the additional time delay in the DPWM converter, when other parameters are the same, the DPWM converter is not always more unstable than the APWM converter. These influences are rarely reported in existing …

A Load Voltage Angle Control of Electric Spring for Energy Storge Reduction

Authors

Wentao He,Dongyuan Qiu,Bo Zhang,Fan Xie,Yanfeng Chen,Wenxun Xiao

Published Date

2023/11/10

The large-scale connection of renewable energy sources (RES) to the grid has led to an increasing energy storage demand in power system. The high price of the energy storage system greatly raises the construction cost. Electric spring (ES) is an emerging technology for demand-side management. The first version ES (ES-1) is originally intended to reduce the energy storage demand, but it can only compensate reactive power. The second version ES (ES-2) has rich functions, but it needs energy storage battery. Compared with ES-1, ES-2 adds additional energy storage unit in power system. This paper investigates the ability of ES-2 to reduce energy storage demand and proposes a load voltage angle control strategy that can adjust the phase angle difference between critical load (CL) voltage and non-critical load (NCL) voltage in real time. By adjusting the phase angle difference, the active power of ES can be …

Shared external driver for VHF converter with a synchronous rectifier based on matching network parameters optimization

Authors

Tianwei Huang,Yanfeng Chen,Bo Zhang,Dongyuan Qiu

Journal

IEEE Transactions on Industrial Electronics

Published Date

2023/4/3

In order to reduce the conduction loss of diode, synchronous rectification is usually adopted in very-high-frequency (VHF) converters, in which the rectifier diode is replaced by a mosfet with very low on-state resistance. And to ensure normal operation of the synchronous rectifier switch, it is necessary to design a suitable driver with accurate timing. The widely used self-oscillating resonant drive circuit has a limited range of duty cycle adjustment, and the body diode of synchronous rectifier switch has long on-state time and a large conduction loss. Therefore, based on the analysis and parameters optimization of matching network, a shared external drive circuit is put forward. That is, the drive signals of the inverter switch and the synchronous rectifier switch come from the same external oscillation signal. On the premise of ensuring accurate drive timing, it can improve the drive signal's duty cycle of synchronous …

A Double-Transmitting Coil Wireless Power Transfer System Based on Parity Time Symmetry Principle

Authors

Hao Chen,Dongyuan Qiu,Chao Rong,Bo Zhang

Journal

IEEE Transactions on Power Electronics

Published Date

2023/8/9

The wireless power transfer (WPT) system based on parity-time (PT) symmetry has the advantages of robustness, stable, and efficient power transmission. However, the region of PT symmetry is limited, which cannot satisfy some practical requirements. Multiple transmitting coils have been shown to improve the misalignment tolerance of WPT systems. Towards this end, a parity-time-symmetric-based WPT (PT-based WPT) system with double-transmitting coil is presented in this article. First, an approximate equivalent circuit model of this PT-based WPT system was developed. Second, compared with the conventional single transmitting coil PT-based WPT system, the proposed system expands the PT symmetry region and provides higher output power and transmission efficiency. Furthermore, the mutual inductance between two transmitting coils can be designed to meet the requirements of different scenarios …

A Switch Type RF Energy Harvesting and Management System

Authors

Hairong Jiang,Wenxun Xiao,Bo Zhang,Guiping Du,Dongyuan Qiu,Yanfeng Chen,Fan Xie

Published Date

2023/11/10

The radio frequency energy in space is extremely weak, and it is very difficult to collect and store sufficient power of radio frequency energy. Therefore, a collection and management technology of 915Mhz radio frequency energy is proposed in this paper. The RF energy acquisition device is based on a 915 Mhz vertically polarized omnidirectional antenna and energy conversion module, and the switched RF energy management system is designed to achieve efficient management and storage of RF energy. Finally, experimental testing is conducted on the basic functions of the hardware system. The experiment shows that under the condition of constant transmission power of the transmission source, when the transmission distance reaches 2 meters, the collected power can reach 1 mW. In a charge cycle, the 50mAh lithium-ion battery can be charged to 4.18 V to meet the energy supply demand of the micro sensor.

Stability Analysis for On-Off Voltage-Mode Controlled VHF Converter Combining Short-Period and Long-Period Discrete Map Models

Authors

Shikai Chen,Yanfeng Chen,Bo Zhang,Dongyuan Qiu

Journal

IEEE Transactions on Circuits and Systems I: Regular Papers

Published Date

2023/12/29

Benefited from harmonics well-defined and easy design of filter, the ON-OFF voltage-mode control strategy suitable for the very-high-frequency (VHF, 30 300MHz) dc-dc converter has been developed in recent year. However, the potential risk of this control strategy is that unreasonable parameter design will lead to system instability. Moreover, the conventional stability methods are also difficult to adopt in VHF converters due to its feature of high circuit order and many operating modes as well as extremely high switching frequency. Hence, this article proposes a new stability analysis method suitable for VHF converter employing the ON-OFF voltage-mode control strategy. Firstly, the combined characteristic of short-period switching signal and long-period modulation signal is considered, which dividing the VHF converter into short-period open-loop system and long-period closed-loop system. Then, by …

A constant output capacitive wireless power transfer system based on parity-time symmetric

Authors

Wenchao Gu,Dongyuan Qiu,Xujian Shu,Bo Zhang,Wenxun Xiao,Yanfeng Chen

Journal

IEEE Transactions on Circuits and Systems II: Express Briefs

Published Date

2023/1/17

In existing capacitive wireless power transfer (CPT) systems, the coupling capacitance of the traditional couplers is usually small, which will lead to a significant decrease in the power transfer capability when the transfer distance increases. Thus, it is a big challenge to achieve stable output power and constant transfer efficiency under different coupling capacitance. In this brief, the circuit model of the CPT system with double-side LC compensation network is established firstly. Then, based on the parity-time (PT) symmetric theory, a primary-side control strategy is presented to achieve stable output power and constant high transfer efficiency when the coupling capacitance changes. Finally, the experimental results show that when the insertion depth of the stack array coupler changes from 60 to 180 mm, the output power of the proposed CPT prototype is almost stable at 25W, and the transfer efficiency is kept at …

See List of Professors in Dongyuan Qiu University(South China University of Technology)

Dongyuan Qiu FAQs

What is Dongyuan Qiu's h-index at South China University of Technology?

The h-index of Dongyuan Qiu has been 21 since 2020 and 30 in total.

What are Dongyuan Qiu's top articles?

The articles with the titles of

Adaptive Logarithmic State Feedback Control With Quasi One-Switching-Cycle Response Characteristic for Three-Phase Inverter

Modeling and Nonlinear Dynamic Analysis of a Photovoltaic System with Multiple Parallel Branches Based on Simplified Discrete Time Model

Switched Active Power Control of Grid-Connected Inverter With Reduced RoCoF and Frequency Overshoot

A Robust Parity-Time-Symmetric Hybrid Wireless Power Transfer System with Extended Coupling Range

H‐infinity loop shaping control of wireless power transfer system based on generalized state space averaging model

Projection value-based smooth adaptive control strategy of single-phase DC-AC converters

Dynamic Modeling and Control Design Based on Singular Perturbation Theory for High-Order Wireless Power Transfer System

Design and analysis of electric spring based on battery-less current-source inverter

...

are the top articles of Dongyuan Qiu at South China University of Technology.

What are Dongyuan Qiu's research interests?

The research interests of Dongyuan Qiu are: Power Electronics

What is Dongyuan Qiu's total number of citations?

Dongyuan Qiu has 3,506 citations in total.

What are the co-authors of Dongyuan Qiu?

The co-authors of Dongyuan Qiu are S.Y. Ron Hui, Henry Chung, Carl Ngai Man Ho, Guidong Zhang, Fan Xie 谢帆.

    Co-Authors

    H-index: 91
    S.Y. Ron Hui

    S.Y. Ron Hui

    Imperial College London

    H-index: 79
    Henry Chung

    Henry Chung

    City University of Hong Kong

    H-index: 28
    Carl Ngai Man Ho

    Carl Ngai Man Ho

    University of Manitoba

    H-index: 22
    Guidong Zhang

    Guidong Zhang

    Guangdong University of Technology

    H-index: 10
    Fan Xie 谢帆

    Fan Xie 谢帆

    South China University of Technology

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