Pub Date : 2024-08-14DOI: 10.1007/s43236-024-00891-5
Yue Li, Hailong Yu, Chuan Jiang, Yong Jin
The inverter module, as a critical device in arc plasma power supplies for converting DC to AC, often encounters issues such as stability errors and system disturbances due to the impact of shock loads when tracking rated voltage and frequency signals. This paper proposes an improved Particle Swarm Optimization (PSO) strategy for Fractional-Order PID (FOPID) control with limited parameter selection, aiming to address the poor performance of inverter modules in arc plasma power supply systems. The proposed strategy incorporates the spiral position updating mode from the Whale Optimization Algorithm into the position updating process of PSO, which improves particle diversity, global search capability and optimization stability. The effectiveness of the proposed method is verified by comparing it with the Ziegler–Nichols tuning method and the standard PSO algorithm in the MATLAB/Simulink simulation environment. A model of an inverter system is established for validation purposes. The results indicate that applying the improved PSO-based FOPID control strategy to the inverter process of the arc plasma power supply system significantly enhances the output waveform quality, reduces harmonic distortion, and achieves excellent control performance.
{"title":"WOA–PSO of fractional-order PID control for arc plasma power supply inverter modules","authors":"Yue Li, Hailong Yu, Chuan Jiang, Yong Jin","doi":"10.1007/s43236-024-00891-5","DOIUrl":"https://doi.org/10.1007/s43236-024-00891-5","url":null,"abstract":"<p>The inverter module, as a critical device in arc plasma power supplies for converting DC to AC, often encounters issues such as stability errors and system disturbances due to the impact of shock loads when tracking rated voltage and frequency signals. This paper proposes an improved Particle Swarm Optimization (PSO) strategy for Fractional-Order PID (FOPID) control with limited parameter selection, aiming to address the poor performance of inverter modules in arc plasma power supply systems. The proposed strategy incorporates the spiral position updating mode from the Whale Optimization Algorithm into the position updating process of PSO, which improves particle diversity, global search capability and optimization stability. The effectiveness of the proposed method is verified by comparing it with the Ziegler–Nichols tuning method and the standard PSO algorithm in the MATLAB/Simulink simulation environment. A model of an inverter system is established for validation purposes. The results indicate that applying the improved PSO-based FOPID control strategy to the inverter process of the arc plasma power supply system significantly enhances the output waveform quality, reduces harmonic distortion, and achieves excellent control performance.</p>","PeriodicalId":50081,"journal":{"name":"Journal of Power Electronics","volume":"165 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142200360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-05DOI: 10.1007/s43236-024-00884-4
YanLing Guo, ChunPeng Wang, ZhiPeng Li
In response to the issue of providing a wireless power supply to the magnetic focusing rotor torque and torsion sensors on the rotating shaft systems, loose-coupled transformers (LCTs) are difficult to disassemble and install due to their large size. In addition, their large mass has a significant impact on the dynamic balance of the shaft system. Consequently, in this paper, a structural design of an flexible printed circuit (FPC)-stacked receiving coil is proposed, with its mathematical model, physical model, and simulation model established. The optimal structure is obtained by simulating the coil-induced voltage under different structural parameters through COMSOL electromagnetic simulation. Through modal simulation analysis of the rotor in ANSYS, it is found that the FPC-stacked receiving coil has less impact on the dynamic balance of the rotating shaft system.
{"title":"FPC receiving coil for wireless power transmission to rotational axis sensors","authors":"YanLing Guo, ChunPeng Wang, ZhiPeng Li","doi":"10.1007/s43236-024-00884-4","DOIUrl":"https://doi.org/10.1007/s43236-024-00884-4","url":null,"abstract":"<p>In response to the issue of providing a wireless power supply to the magnetic focusing rotor torque and torsion sensors on the rotating shaft systems, loose-coupled transformers (LCTs) are difficult to disassemble and install due to their large size. In addition, their large mass has a significant impact on the dynamic balance of the shaft system. Consequently, in this paper, a structural design of an flexible printed circuit (FPC)-stacked receiving coil is proposed, with its mathematical model, physical model, and simulation model established. The optimal structure is obtained by simulating the coil-induced voltage under different structural parameters through COMSOL electromagnetic simulation. Through modal simulation analysis of the rotor in ANSYS, it is found that the FPC-stacked receiving coil has less impact on the dynamic balance of the rotating shaft system.</p>","PeriodicalId":50081,"journal":{"name":"Journal of Power Electronics","volume":"12 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141948200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-05DOI: 10.1007/s43236-024-00888-0
Manyuan Ye, Hao Li, Jiaxin Yao
The switching loss of the traditional DPWM method is large. Therefore, this paper improves the traditional DPWM method by adding a clamping interval to reduce the switching loss. The traditional method is also improved using a modulating waveform spatial reorganization method to improve the modulation signal added to the clamping interval so that the switching frequency of each switch remains consistent, which balances the switching loss of each H-bridge unit of the cascaded H-bridge multilevel inverter and improves the reliability of the inverter. The carrier phase-shifting method is used to realize the power balance of each H-bridge unit. Simulation and experimental results verify the feasibility of the modulation strategy.
传统 DPWM 方法的开关损耗较大。因此,本文改进了传统的 DPWM 方法,增加了一个箝位区间,以降低开关损耗。同时还利用调制波形空间重组方法对传统方法进行了改进,改进了加入箝位区间的调制信号,使每个开关的开关频率保持一致,从而平衡了级联 H 桥多级逆变器中每个 H 桥单元的开关损耗,提高了逆变器的可靠性。采用载波移相方法实现了每个 H 桥单元的功率平衡。仿真和实验结果验证了调制策略的可行性。
{"title":"Improved DPWM modulation for reducing switching losses in cascaded H-bridge multilevel inverters","authors":"Manyuan Ye, Hao Li, Jiaxin Yao","doi":"10.1007/s43236-024-00888-0","DOIUrl":"https://doi.org/10.1007/s43236-024-00888-0","url":null,"abstract":"<p>The switching loss of the traditional DPWM method is large. Therefore, this paper improves the traditional DPWM method by adding a clamping interval to reduce the switching loss. The traditional method is also improved using a modulating waveform spatial reorganization method to improve the modulation signal added to the clamping interval so that the switching frequency of each switch remains consistent, which balances the switching loss of each H-bridge unit of the cascaded H-bridge multilevel inverter and improves the reliability of the inverter. The carrier phase-shifting method is used to realize the power balance of each H-bridge unit. Simulation and experimental results verify the feasibility of the modulation strategy.</p>","PeriodicalId":50081,"journal":{"name":"Journal of Power Electronics","volume":"63 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141948197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-05DOI: 10.1007/s43236-024-00887-1
Hyung-Woo Lee, Hyeon-Jun Park, Kyo-Beum Lee
This paper proposes a method for the torque ripple reduction of an open-end winding interior permanent magnet synchronous motor (OEW-IPMSM) using direct self-control (DSC). The conventional DSC has been researched in high-power systems because of its advantages in terms of a low switching frequency and a fast response of torque. Nevertheless, high torque ripple is a disadvantage of the conventional DSC. This is because the trajectory of the stator flux is controlled in the shape of a hexagon for lower switching frequencies and by applying hysteresis torque control. In this paper, predictive torque control using a mathematical model of an OEW-IPMSM is presented to improve the quality of the torque control. In addition, the presented method addresses the trajectory control of the flux using the diverse voltage vectors of the dual inverter. The validity of the presented method is demonstrated by simulations and experimental results.
{"title":"Model-based predictive torque control of open-end winding IPMSMs driven by direct self-control","authors":"Hyung-Woo Lee, Hyeon-Jun Park, Kyo-Beum Lee","doi":"10.1007/s43236-024-00887-1","DOIUrl":"https://doi.org/10.1007/s43236-024-00887-1","url":null,"abstract":"<p>This paper proposes a method for the torque ripple reduction of an open-end winding interior permanent magnet synchronous motor (OEW-IPMSM) using direct self-control (DSC). The conventional DSC has been researched in high-power systems because of its advantages in terms of a low switching frequency and a fast response of torque. Nevertheless, high torque ripple is a disadvantage of the conventional DSC. This is because the trajectory of the stator flux is controlled in the shape of a hexagon for lower switching frequencies and by applying hysteresis torque control. In this paper, predictive torque control using a mathematical model of an OEW-IPMSM is presented to improve the quality of the torque control. In addition, the presented method addresses the trajectory control of the flux using the diverse voltage vectors of the dual inverter. The validity of the presented method is demonstrated by simulations and experimental results.</p>","PeriodicalId":50081,"journal":{"name":"Journal of Power Electronics","volume":"28 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141948198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-05DOI: 10.1007/s43236-024-00889-z
Man Li, Anqi Liu, Jiafei Yao, Jun Zhang, Zixuan Wang, Fanyu Liu, Yufeng Guo
Novel performance improvement technology is developed for an ultrathin Double Silicon-on-Insulator (DSOI) Lateral Double-diffused Metal–Oxide–Semiconductor (LDMOS) with a heavy doping drift region, which is simulated using TCAD and an advanced application module for circuit analysis (CA-AAM). A peripheral circuit was proposed to dynamically control the independent back-gate electrode of the DSOI, with a zero bias for the ON-state and a negative bias for the OFF-state. A heavily doped drift region was designed to maintain a low specific on-resistance (Ron,sp), where a negative back-gate bias would induce positive charges to compensate for the heavily doped ionized acceptors. This results in an improved breakdown voltage (BV). Therefore, it rebuilds the traditional reduced surface field (RESURF) condition. Results indicate that the developed technology exhibits optimization in terms of the BV, Ron,sp, OFF-state leakage current, ON-state current, peak transconductance, cut-off frequency, turn-off time, Baliga’s figure of merits (BFOM), and figure of merits (FOM) when compared with the conventional RESURF technology.
{"title":"Novel dynamic back-gate control technology for performance improvement in ultrathin double SOI LDMOS","authors":"Man Li, Anqi Liu, Jiafei Yao, Jun Zhang, Zixuan Wang, Fanyu Liu, Yufeng Guo","doi":"10.1007/s43236-024-00889-z","DOIUrl":"https://doi.org/10.1007/s43236-024-00889-z","url":null,"abstract":"<p>Novel performance improvement technology is developed for an ultrathin Double Silicon-on-Insulator (DSOI) Lateral Double-diffused Metal–Oxide–Semiconductor (LDMOS) with a heavy doping drift region, which is simulated using TCAD and an advanced application module for circuit analysis (CA-AAM). A peripheral circuit was proposed to dynamically control the independent back-gate electrode of the DSOI, with a zero bias for the ON-state and a negative bias for the OFF-state. A heavily doped drift region was designed to maintain a low specific on-resistance (<i>R</i><sub><i>on,sp</i></sub>), where a negative back-gate bias would induce positive charges to compensate for the heavily doped ionized acceptors. This results in an improved breakdown voltage (<i>BV</i>). Therefore, it rebuilds the traditional reduced surface field (RESURF) condition. Results indicate that the developed technology exhibits optimization in terms of the <i>BV</i>, <i>R</i><sub><i>on,sp</i></sub>, OFF-state leakage current, ON-state current, peak transconductance, cut-off frequency, turn-off time, Baliga’s figure of merits (BFOM), and figure of merits (FOM) when compared with the conventional RESURF technology.</p>","PeriodicalId":50081,"journal":{"name":"Journal of Power Electronics","volume":"10 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141948199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Multi-dimensional wireless power transmission is a critical element in the development of capsule robots. To solve the problem caused by the increasing number of functions of new capsule robots and the fact that the traditional three-dimensional receiving coil occupies excessive inner space, a two-dimensional square transmitting coil with an embedded ferrite core is proposed. The proposed transmitting coil consists of two pairs of rectangular solenoid coils distributed radially along the human body. By changing the direction of the current flow, it can generate a two-dimensional magnetic field covering the whole central plane. This paper presents a theoretical model and conducts finite element simulations to analyze the magnetic flux density in the center plane. To evaluate the effectiveness of the proposed system, two prototypes of transmitting coils with and without ferrite cores are created, tested and compared to assess the performance improvements. Results indicate that the transmitting coil with a ferrite core increases the power transfer efficiency from 5.07% to 6.11%. In addition, attitude experiments reveal that the receiving coil efficiently captures sufficient energy at various angles when operated in the center plane.
{"title":"Two-dimensional ferrite core-based transmitting coil for wireless power transfer in novel capsule robots","authors":"Renqing Wen, Guozheng Yan, Jinbin Wu, Shuai Kuang, Ding Han, Pingping Jiang, Zhiwu Wang","doi":"10.1007/s43236-024-00871-9","DOIUrl":"https://doi.org/10.1007/s43236-024-00871-9","url":null,"abstract":"<p>Multi-dimensional wireless power transmission is a critical element in the development of capsule robots. To solve the problem caused by the increasing number of functions of new capsule robots and the fact that the traditional three-dimensional receiving coil occupies excessive inner space, a two-dimensional square transmitting coil with an embedded ferrite core is proposed. The proposed transmitting coil consists of two pairs of rectangular solenoid coils distributed radially along the human body. By changing the direction of the current flow, it can generate a two-dimensional magnetic field covering the whole central plane. This paper presents a theoretical model and conducts finite element simulations to analyze the magnetic flux density in the center plane. To evaluate the effectiveness of the proposed system, two prototypes of transmitting coils with and without ferrite cores are created, tested and compared to assess the performance improvements. Results indicate that the transmitting coil with a ferrite core increases the power transfer efficiency from 5.07% to 6.11%. In addition, attitude experiments reveal that the receiving coil efficiently captures sufficient energy at various angles when operated in the center plane.</p>","PeriodicalId":50081,"journal":{"name":"Journal of Power Electronics","volume":"64 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141867969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The shoot-through state of the Z-source inverter generates large switching losses. However, the discontinuous modulation strategy can effectively reduce the switching losses of power devices. When the discontinuous modulation strategy is used in Z-source inverters, the switching sequences and the shoot-through states need to be arranged reasonably. This paper provides a method for comparing the switching losses of different modulation strategies by calculating the current that is passed through a switching device for a fundamental cycle. The calculations show that the Z-source inverter switching losses are determined by the number of switching actions in a switching period and by the method of insertion of the shoot-through state. Based on this, a generalized discontinuous modulation strategy for Z-source inverters is proposed. This modulation strategy achieves optimal switching losses when the power factor is less than 1. The method of redistributing the shoot-through states can be applied to other modulation strategies to achieve loss optimization. The effectiveness of the proposed modulation method is demonstrated by MATLAB/Simulink combined with PLECS simulation. Finally, and a low-power platform is built for experimental verification.
Z 源逆变器的击穿状态会产生较大的开关损耗。然而,非连续调制策略可以有效降低功率器件的开关损耗。在 Z 源逆变器中使用非连续调制策略时,需要合理安排开关序列和击穿状态。本文通过计算一个基本周期内通过开关器件的电流,提供了一种比较不同调制策略开关损耗的方法。计算结果表明,Z 源逆变器的开关损耗取决于开关周期内的开关动作次数和插入击穿状态的方法。在此基础上,提出了一种适用于 Z 源逆变器的通用非连续调制策略。当功率因数小于 1 时,该调制策略可实现最佳开关损耗。重新分配击穿状态的方法可应用于其他调制策略,以实现损耗优化。MATLAB/Simulink 结合 PLECS 仿真证明了所提调制方法的有效性。最后,还搭建了一个低功耗平台进行实验验证。
{"title":"Generalized discontinuous PWM strategy for Z-source inverters with switch losses optimization","authors":"Yizhan Jiang, Qiang Wang, Fengyou He, Jingwei Zhang, Zhikang Guo","doi":"10.1007/s43236-024-00883-5","DOIUrl":"https://doi.org/10.1007/s43236-024-00883-5","url":null,"abstract":"<p>The shoot-through state of the Z-source inverter generates large switching losses. However, the discontinuous modulation strategy can effectively reduce the switching losses of power devices. When the discontinuous modulation strategy is used in Z-source inverters, the switching sequences and the shoot-through states need to be arranged reasonably. This paper provides a method for comparing the switching losses of different modulation strategies by calculating the current that is passed through a switching device for a fundamental cycle. The calculations show that the Z-source inverter switching losses are determined by the number of switching actions in a switching period and by the method of insertion of the shoot-through state. Based on this, a generalized discontinuous modulation strategy for Z-source inverters is proposed. This modulation strategy achieves optimal switching losses when the power factor is less than 1. The method of redistributing the shoot-through states can be applied to other modulation strategies to achieve loss optimization. The effectiveness of the proposed modulation method is demonstrated by MATLAB/Simulink combined with PLECS simulation. Finally, and a low-power platform is built for experimental verification.</p>","PeriodicalId":50081,"journal":{"name":"Journal of Power Electronics","volume":"21 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141780059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-25DOI: 10.1007/s43236-024-00882-6
Hanhim Sung, Jong-Won Shin, Wonhee Kim
A two-transformer active clamp forward flyback (ACFF) converter without output inductors is suitable for high output current applications such as low-voltage DC-DC converters (LDCs) in electrified vehicles. This paper presents the reverse power transmission operation of an ACFF converter used Synchronous Rectifier (SR). One of the target applications of the proposed converter is bidirectional LDCs used in electrified vehicles due to its high-power density and cost competitiveness. Operational principles with key voltage and current waveforms are provided, and a detailed analysis of each operating interval is provided, offering guidelines for component selection. Experimental results obtained from a 14 V–600 V hardware prototype verifies the feasibility of operation in practical LDCs.
{"title":"Reverse power transmission of two-transformer active clamp forward flyback converter","authors":"Hanhim Sung, Jong-Won Shin, Wonhee Kim","doi":"10.1007/s43236-024-00882-6","DOIUrl":"https://doi.org/10.1007/s43236-024-00882-6","url":null,"abstract":"<p>A two-transformer active clamp forward flyback (ACFF) converter without output inductors is suitable for high output current applications such as low-voltage DC-DC converters (LDCs) in electrified vehicles. This paper presents the reverse power transmission operation of an ACFF converter used Synchronous Rectifier (SR). One of the target applications of the proposed converter is bidirectional LDCs used in electrified vehicles due to its high-power density and cost competitiveness. Operational principles with key voltage and current waveforms are provided, and a detailed analysis of each operating interval is provided, offering guidelines for component selection. Experimental results obtained from a 14 V–600 V hardware prototype verifies the feasibility of operation in practical LDCs.</p>","PeriodicalId":50081,"journal":{"name":"Journal of Power Electronics","volume":"31 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141780060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-22DOI: 10.1007/s43236-024-00877-3
Yang An, Xiangdong Sun, Biying Ren, Xiaobin Zhang
As the proportion of clean energy continues to increase, low carbon energy systems will be a significant way to achieve the goal of carbon neutrality. Therefore, the reliability of modular multilevel converters (MMCs) is particularly significant. However, conventional open-circuit fault diagnosis (OCFD) methods usually have a limited localization speed or are difficult to achieve in practical engineering. Therefore, a fast and simpled OCFD approach for MMC SMs based on an optimized deep learning is proposed in this article. In this approach, data on the of submodule capacitance voltages are input into a trained WOA-DKELM model without the manually settings. The problems of randomness in the regularization coefficient C and the kernel parameters K can be solved by DKELM with WOA optimization, which has a strong generalization capability and higher prognostic accuracy. The effectiveness of the proposed approach is verified by experiment results. This approach achieves an average identification probability of 0.96 within 20 ms of the fault.
随着清洁能源比例的不断增加,低碳能源系统将成为实现碳中和目标的重要途径。因此,模块化多电平转换器(MMC)的可靠性尤为重要。然而,传统的开路故障诊断(OCFD)方法通常定位速度有限,或在实际工程中难以实现。因此,本文提出了一种基于优化深度学习的 MMC SM 快速、简化 OCFD 方法。在该方法中,子模块电容电压数据无需手动设置,直接输入训练有素的 WOA-DKELM 模型。正则化系数 C 和核参数 K 的随机性问题可以通过 DKELM 与 WOA 优化来解决,它具有很强的泛化能力和更高的预报精度。实验结果验证了所提方法的有效性。该方法在故障发生后 20 毫秒内的平均识别概率达到 0.96。
{"title":"Novel data-driven open-circuit fault diagnosis method for modular multilevel converter submodules based on optimized deep learning","authors":"Yang An, Xiangdong Sun, Biying Ren, Xiaobin Zhang","doi":"10.1007/s43236-024-00877-3","DOIUrl":"https://doi.org/10.1007/s43236-024-00877-3","url":null,"abstract":"<p>As the proportion of clean energy continues to increase, low carbon energy systems will be a significant way to achieve the goal of carbon neutrality. Therefore, the reliability of modular multilevel converters (MMCs) is particularly significant. However, conventional open-circuit fault diagnosis (OCFD) methods usually have a limited localization speed or are difficult to achieve in practical engineering. Therefore, a fast and simpled OCFD approach for MMC SMs based on an optimized deep learning is proposed in this article. In this approach, data on the of submodule capacitance voltages are input into a trained WOA-DKELM model without the manually settings. The problems of randomness in the regularization coefficient<i> C</i> and the kernel parameters <i>K</i> can be solved by DKELM with WOA optimization, which has a strong generalization capability and higher prognostic accuracy. The effectiveness of the proposed approach is verified by experiment results. This approach achieves an average identification probability of 0.96 within 20 ms of the fault.</p>","PeriodicalId":50081,"journal":{"name":"Journal of Power Electronics","volume":"15 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141745848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-22DOI: 10.1007/s43236-024-00880-8
Jongun Baek, Jong-Won Shin, Wonhee Kim
This paper proposes a new averaged switch model for pulse-width modulated (PWM) single-ended primary-inductor converter (SEPIC) operating in discontinuous conduction mode (DCM). The equivalent series resistance (ESR) of each energy component is considered to achieve a more precise model. The model, which is modification of the conventional averaging equation, accurately reflects both the remaining current and the actual charge on each capacitor in DCM. The proposed model utilizes a new duty ratio constraint and predicts better than previous models at high frequencies. The dependent sources of the switch components are derived from the modified averaged equation, and an implementation of the model in LTspice XVII is provided to facilitate the frequency response analysis. The frequency response of a prototype SEPIC in DCM, with an input voltage of 5 V, an output voltage of 13.5 V, and a switching frequency of 100 kHz, was experimentally measured to verify the proposed model. Simulation and experimental results demonstrate that the proposed averaged switch model solves the discrepancies at high frequencies, which was a limitation of previous models.
{"title":"Averaged switch model of single-ended primary inductor converter in discontinuous conduction mode","authors":"Jongun Baek, Jong-Won Shin, Wonhee Kim","doi":"10.1007/s43236-024-00880-8","DOIUrl":"https://doi.org/10.1007/s43236-024-00880-8","url":null,"abstract":"<p>This paper proposes a new averaged switch model for pulse-width modulated (PWM) single-ended primary-inductor converter (SEPIC) operating in discontinuous conduction mode (DCM). The equivalent series resistance (ESR) of each energy component is considered to achieve a more precise model. The model, which is modification of the conventional averaging equation, accurately reflects both the remaining current and the actual charge on each capacitor in DCM. The proposed model utilizes a new duty ratio constraint and predicts better than previous models at high frequencies. The dependent sources of the switch components are derived from the modified averaged equation, and an implementation of the model in LTspice XVII is provided to facilitate the frequency response analysis. The frequency response of a prototype SEPIC in DCM, with an input voltage of 5 V, an output voltage of 13.5 V, and a switching frequency of 100 kHz, was experimentally measured to verify the proposed model. Simulation and experimental results demonstrate that the proposed averaged switch model solves the discrepancies at high frequencies, which was a limitation of previous models.</p>","PeriodicalId":50081,"journal":{"name":"Journal of Power Electronics","volume":"6 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141738295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}