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A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Electrical, Electronics and Communications Engineering".

Deadline for manuscript submissions: closed (31 August 2022) | Viewed by 21723

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Special Issue Editors

Prof. Dr. Fengjiang Wu

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Guest Editor

School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China
Interests: renewable energy generation; high-frequency isolated power conversion; energy storage systems
Special Issues, Collections and Topics in MDPI journals

Dr. Jiandong Duan

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Guest Editor

Department of Electrical Engineering, Haerbin Institute of Technology, Harbin 150001, China
Interests: energy conversion and control; energy storage systems
Special Issues, Collections and Topics in MDPI journals

Prof. Dr. Hongchen Liu

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Guest Editor

School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China
Interests: power electronics technology; matrix power converter; power converter system modeling; dynamics analysis and control; distributed power supply system
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Power electronic technology plays an increasingly important role in modern energy utilization systems. Modern power electronics technology is developing toward high frequency, high efficiency, and high reliability. There are still many challenges that need to be overcome. This Special Issue focuses on the latest achievements of ensemble power electronics technology, including the following aspects: novel topology of converters, modeling and control strategies, fault analysis and diagnosis methods; and new principle converters in wireless power transmission and other emerging applications. The purpose is to provide opportunities for researchers in related fields to display and exchange the latest achievements, establish a database of achievements in the direction of power electronics, and provide solutions for related application fields.

Prospective authors are invited to submit original contributions or survey papers for review for publication in this Special Issue.

Dr. Fengjiang Wu
Dr. Jiandong Duan
Prof. Dr. Hongchen Liu
Guest Editors

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Keywords

topology and modulations of converter/inverters
modeling and control of converter/inverters
power conversion technologies for wireless power transmission
fault diagnosis of converter/inverters
emerging power conversion technologies

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Published Papers (11 papers)

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Editorial

Jump to: Research

2 pages, 160 KiB

Open AccessEditorial

Special Issue on Challenges for Power Electronics Converters

by Jiandong Duan, Fengjiang Wu and Hongchen Liu

Appl. Sci. 2022, 12(23), 12300; https://doi.org/10.3390/app122312300 - 1 Dec 2022

Cited by 2 | Viewed by 1090

Abstract

Power electronics technology is playing an increasingly important role in modern energy utilization systems [...] Full article

(This article belongs to the Special Issue Challenges for Power Electronics Converters)

Research

Jump to: Editorial

12 pages, 5644 KiB

Open AccessArticle

Fault Detection and Isolation of Load Mutation Caused by Electrical Interference of Single-Shaft Combined Cycle Power Plant

by Kun Yao, Ying Wang, Zongjie Li, Jiajia Li, Jie Wan and Yong Cao

Appl. Sci. 2022, 12(22), 11472; https://doi.org/10.3390/app122211472 - 11 Nov 2022

Cited by 4 | Viewed by 1221

Abstract

Because the generator power-measuring equipment is often accompanied by electrical interference in a complex electromagnetic environment in an actual thermal power plant, the output signal will change or even distort while it passes through the devices of acquisition and conversion. Several practical cases have found that the abnormal generation change phenomenon, impulse or oscillation caused by electrical interference, has different effects on the load regulation of steam turbines. These faults also exist in combined-cycle power plants (CCPPs). However, the insufficient installed capacity and operating life of CCPPs domestically cause similar load mutation failures that are scarcely found. We had to acknowledge that CCPPs and steam turbine regulation characteristics differ. It is of great value to study the influence of differences in load mutation on the load regulation of single-shaft CCPPs. We extracted the fault characteristics of two sudden load change phenomena using the operation data of an actual steam turbine and analyzed them through simulation. Furthermore, a fault detection and isolation method for sudden load changes in a single-shaft CCPP was proposed and the simulation results verified the method’s effectiveness. Full article

(This article belongs to the Special Issue Challenges for Power Electronics Converters)

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13 pages, 4789 KiB

Open AccessArticle

Backstepping Sliding Mode Control of a Permanent Magnet Synchronous Motor Based on a Nonlinear Disturbance Observer

by Jiandong Duan, Shuai Wang and Li Sun

Appl. Sci. 2022, 12(21), 11225; https://doi.org/10.3390/app122111225 - 5 Nov 2022

Cited by 8 | Viewed by 2504

Abstract

In this paper, a backstepping sliding mode controller based on a nonlinear disturbance observer (NDO-SMC) is proposed to realize the high-performance speed control of a permanent magnet synchronous motor (PMSM). This paper compares the advantages and disadvantages of the traditional backstepping sliding mode control algorithm (SMC) and integral backstepping sliding mode control algorithm (I-SMC) in the face of mismatched disturbances. In view of the shortcomings of these two algorithms, the idea of using a disturbance observer to observe disturbance and carry out dynamic compensation is proposed, and the composite controller is designed. The overshoot and settling time is improved by 30% and 8 s, respectively, for the proposed NDO-SMC controller compared with the SMC controller. The simulation and experimental results illustrate that the designed controller not only effectively solves the torque jitter problem of SMC, but also improves the overshoot problem caused by the integral module of I-SMC. There is also a better matching degree between the theoretical derivation, the simulation results, and experimental data. It also proves that the composite control algorithm proposed in this paper provides a meaningful solution to the operation disturbance suppression problem of the permanent magnet synchronous motor. Full article

(This article belongs to the Special Issue Challenges for Power Electronics Converters)

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21 pages, 530 KiB

Open AccessArticle

Existence and Stability of nT-Periodic Orbits in the Boost Converter

by Simeón Casanova Trujillo, John E. Candelo-Becerra and Fredy E. Hoyos

Appl. Sci. 2022, 12(19), 9565; https://doi.org/10.3390/app12199565 - 23 Sep 2022

Cited by 1 | Viewed by 1215

Abstract

In high load conditions, the boost converter presents some phenomena, such as chattering, chaos, subharmonics, and

n T

-periodic orbits, which require studying them with the aim of reducing the effects and improving the performance of these electronic devices. In this paper, sufficient [...] Read more.

In high load conditions, the boost converter presents some phenomena, such as chattering, chaos, subharmonics, and

n T

-periodic orbits, which require studying them with the aim of reducing the effects and improving the performance of these electronic devices. In this paper, sufficient conditions for the existence of

n T

-periodic orbits are analytically obtained and the system stability is evaluated using eigenvalues of the Jacobian matrix of the Poincaré application. It is demonstrated numerically that

1 T

-periodic orbits occur for a broad range of

γ

parameters. The research obtains a particular class of

2 T

-periodic orbits in the boost converter and a formula that provides sufficient conditions for the existence of

n T

-periodic orbits with and without saturation in the duty cycle. In addition, an analysis of

n T

-periodic orbits is performed with a biparametric diagram. The system stability is computed using a variational equation that allows perturbation of the

1 T

-periodic orbits. Moreover, an analytical calculation of the Floquet exponents is performed to determine the stability limit of the

1 T

-periodic orbit. Finally, the phenomena found in this research are described according to the behavior of real applications encountered in previous literature. Full article

(This article belongs to the Special Issue Challenges for Power Electronics Converters)

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23 pages, 11676 KiB

Open AccessArticle

Study on Suppression Strategy for Broadband Sub-Synchronous Oscillation in Doubly-Fed Wind Power Generation System

by Dongyang Sun, Fanyi Meng and Wenqiang Shen

Appl. Sci. 2022, 12(16), 8344; https://doi.org/10.3390/app12168344 - 20 Aug 2022

Cited by 5 | Viewed by 1595

Abstract

In the power transmission of doubly-fed induction generators (DFIGs), sub-synchronous oscillation (SSO) can occur due to the influence of series compensation capacitance and long-distance transmission. SSO not only affects the output of the DFIG but also leads to oscillation diffusion. In order to solve the problem of disturbance in the control of the DFIG rotor side converter (RSC) under SSO, an adaptive quasi-resonant controller is proposed for the suppression of SSO. This strategy focuses on the propagation path of and frequency change in the SSO in the RSC control system and suppresses the SSO current in the wideband through the cooperative control of the back-stepping controller and the adaptive quasi-resonant controller. In this way, the stator-side output of the DFIG will not be affected by SSO, thus avoiding the amplification of the sub-synchronous power of the line by the DFIG. A simulation model and experimental platform were built to verify the suppression effect of this control strategy on the DFIG stator sub-synchronous current at different SSO frequencies. The results show that the proposed strategy has a good suppression effect on broadband SSO. Full article

(This article belongs to the Special Issue Challenges for Power Electronics Converters)

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18 pages, 3259 KiB

Open AccessArticle

A Full Load Range ZVS Isolated Three-Level DC/DC Converter with Active Commutation Auxiliary Circuit Suitable for Electric Vehicle Charging Application

by Shaogui Fan, Jinwei Wen, Jiandong Duan, Zitong Song and Tianyu Liu

Appl. Sci. 2022, 12(16), 8325; https://doi.org/10.3390/app12168325 - 20 Aug 2022

Cited by 2 | Viewed by 1710

Abstract

The isolated three-level DC/DC converter (ITLDC) can be used to charge electric vehicles. During the constant current charging stage, the ITLDC can be designed to realize nature zero voltage switching (ZVS). However, during the constant voltage charging stage, the charging current is small; thus, nature ZVS cannot be realized. This paper presents an active commutation auxiliary circuit (ACAC) for the ITLDC to realize the full load range ZVS. With the proposed ACACs, all the main switches achieve zero-voltage turn-on and quasi zero-voltage turn-off, and the auxiliary switches realize zero current turn-on and zero-voltage turn-off; thus, the efficiency will be high. The auxiliary currents generated by the ACACs are controllable. During the constant current charging stage, the ITLDC realizes nature ZVS and the auxiliary currents are controlled to zero; thus, the ACACs do not result in high current stress or bring in additional losses, and the efficiency will be high. During the constant voltage charging stage, the charging current decreases with charging time and the charging current is too small to realize nature ZVS. Thus, the ITLDC can work with the proposed ACACs and the auxiliary currents can be controlled within a suitable value to realize ZVS. With the proposed ACACs, the ITLDC can realize ZVS during the whole charging process; thus, the efficiency will be high. The structure and operating principle of the ITLDC with ACACs are introduced and the performance of the proposed TLDC is experimentally verified on a 1.5 kW prototype converter. Full article

(This article belongs to the Special Issue Challenges for Power Electronics Converters)

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16 pages, 5564 KiB

Open AccessArticle

Modeling and Compound Closed-Loop Control of Single-Phase Quasi-Single-Stage Isolated AC-DC Converter

by Fengjiang Wu, Guangfu Hu and Jianyong Su

Appl. Sci. 2022, 12(15), 7886; https://doi.org/10.3390/app12157886 - 5 Aug 2022

Cited by 2 | Viewed by 1944

Abstract

The single-phase isolated quasi-single-stage AC-DC converter has many virtues, such as high power density and efficiency; however, its grid current closed-loop control has not been solved. This paper aims to solve the remaining gap based on a large-signal model. In this paper, the large-signal model of this converter under triple-phase-shift modulation is built for the first time. It is verified that the built model is a zero-order linear system. Based on this built model, the effect of grid harmonics on this converter grid current is analyzed. The theoretical analysis reveals that the grid voltage low-order harmonics will cause the same order grid current harmonics and only varying the parameters of the filter is not an effective method to solve this problem. For the purpose of eliminating the effect of grid voltage harmonics on the grid current and realizing the zero-error control of the fundamental component of the grid current, a grid current closed-loop control strategy based on the proportional-resonant compound odd-mode repetitive controller is proposed. The operation principle, parameter constraint, and design rule of the proposed compound control strategy are analyzed comprehensively. The theoretical analysis and the compound control strategy put forward in this paper are tested, with detailed experimental results. Full article

(This article belongs to the Special Issue Challenges for Power Electronics Converters)

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13 pages, 4956 KiB

Open AccessArticle

Design of WPT System Based on Interleaved Boost Converter

by Jing Wu, Weiyan Zheng, Yanping Jiang and Yijie Wang

Appl. Sci. 2022, 12(14), 6994; https://doi.org/10.3390/app12146994 - 11 Jul 2022

Cited by 5 | Viewed by 1408

Abstract

With the improvement of technology, the demand for electrical power continues to deepen. Wireless Power Transfer (WPT) technology can transmit power without using physical media such as cables, and it has the advantages of electrical isolation, convenience, and safety. At present, the miniaturization of the secondary side is an emerging trend of WPT systems, which is analyzed in this paper. By introducing an interleaved boost converter in the front stage, the DC bus voltage of the primary side is increased, the loss of the primary side is reduced, and the system efficiency is improved. At the same time, the self-inductance of the primary and secondary sides of the loosely coupled transformer is designed to meet the stress requirements of passive devices and the realization of a closed-loop system. Finally, a WPT system with an input voltage of 100 V, an output voltage of 100 V and a transmission power of 500 W is built. The transmission distance of this system is 170 mm, with a lateral offset of 200 mm and a vertical offset of 100 mm. After the offset of the primary and secondary sides, the output voltage can be stabilized at 100 V, and the system efficiency can reach 90.1%, which proves the feasibility of the system efficiency improvement strategy and the effectiveness of the closed-loop control. Full article

(This article belongs to the Special Issue Challenges for Power Electronics Converters)

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17 pages, 8694 KiB

Open AccessArticle

TAB Series-Resonant DC-DC Converter and Multi-Phase-Shift Based Global Optimization Modulation

by Fengjiang Wu, Kaixuan Wang and Jianyong Su

Appl. Sci. 2022, 12(13), 6783; https://doi.org/10.3390/app12136783 - 4 Jul 2022

Cited by 3 | Viewed by 1971

Abstract

In this paper, a triple-active-bridge resonant dc-dc converter with the ability of topology-level power decoupling is proposed. The power coupling between the two dc ports is eliminated by adding a resonant capacitor to the common port. The operation principle and the steady-state power characteristics are analyzed. On this basis, a multi-phase-shift-based global optimization modulation is proposed to minimize the RMS values of the transformer currents in the entire power and voltage range, thus increasing the global efficiency. An experimental prototype is built to verify the correctness and availability of the proposed power decoupling topology and optimized modulation. Full article

(This article belongs to the Special Issue Challenges for Power Electronics Converters)

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27 pages, 16415 KiB

Open AccessArticle

Accurate Electro-Thermal Computational Model Design and Validation for Inverters of Automotive Electric Drivetrain Applications

by Haaris Rasool, Mohamed El Baghdadi, Abdul Manan Rauf, Assel Zhaksylyk, Thomas D’hondt, Mathieu Sarrazin and Omar Hegazy

Appl. Sci. 2022, 12(11), 5593; https://doi.org/10.3390/app12115593 - 31 May 2022

Cited by 5 | Viewed by 3134

Abstract

This paper proposes the fast and accurate electro-thermal model of the existing Simrod three-phase inverter for an electric vehicle (EV) application. The research focuses on analytical and dynamic electro-thermal models of inverters that can be applied for multi-applications. The optimal design approach of passive filters is presented for the DC and AC sides of the inverter. The analytical model has been established, including a mathematical representation of the inverter and induction motor (IM). The high-fidelity electro-thermal simulation model of an inverter with integrated power loss and thermal model is established. The state-space thermal model (for the IRFS4115PbF device) has been created and incorporated into the MATLAB simulation. The simulation model is then validated with the PLECS software-based thermal model to confirm the accuracy. Indirect field-oriented control (IFOC) is designed for squirrel-cage IM at a maximum power rating of 45 kW and implemented on MATLAB/Simulink. The comparative analysis between the real and simulated results is performed to validate the simulation model at a specific speed, torque, and current. Furthermore, the electro-thermal simulation model has been validated with experimental data using efficiency and temperature comparison. The developed simulation model is beneficial for designing, optimizing, and developing advanced technology-based inverters to achieve higher efficiency at a particular operating range of temperature and power quality. The new European driving cycle (NEDC) speed profile simulation results are demonstrated. Full article

(This article belongs to the Special Issue Challenges for Power Electronics Converters)

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14 pages, 5974 KiB

Open AccessArticle

Hybrid Harmonic Suppression Method at DC Link of Series-Connected 18-Pulse Rectifier

by Quanhui Li, Xinyu Yin, Fangang Meng, Xiao He, Gaojie Wang and Changxing Guo

Appl. Sci. 2022, 12(11), 5544; https://doi.org/10.3390/app12115544 - 30 May 2022

Cited by 2 | Viewed by 1775

Abstract

To suppress the harmonics of series-connected 18-pulse rectifier, a hybrid harmonic suppression method is proposed in this paper. According to the structure of the converter and the KVL, the injection voltages are expressed. According to the injection voltages, the relation between the input voltage THD and the injection transformer turn ratio is obtained. Based on the relationship, when the THD of the input voltage researches the lowest value, the optimal injection transformer turn ratio is determined. Testing result shows that after using the proposed reduction method, the input side THD values of the converter are reduced. The capacity of the suppression circuit is only about 2% of the load power. The proposed converter is qualified for the interface between the AC generator and the DC bus of the aircraft electrical system. Full article

(This article belongs to the Special Issue Challenges for Power Electronics Converters)

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