CPSS Transactions on Power Electronics and Applications最新文献_第3页

Dual-Objective Accelerated Linear Convergence Spotted Hyena Optimization for Power Enhancement in Partially Shaded PV Arrays 双目标加速线性收敛 Spotted Hyena 优化技术用于提高部分遮光光伏阵列的功率

CPSS Transactions on Power Electronics and Applications Pub Date : 2024-08-30 DOI: 10.24295/CPSSTPEA.2024.00016

K. T. Swetha;B. Venugopal Reddy

{"title":"Dual-Objective Accelerated Linear Convergence Spotted Hyena Optimization for Power Enhancement in Partially Shaded PV Arrays","authors":"K. T. Swetha;B. Venugopal Reddy","doi":"10.24295/CPSSTPEA.2024.00016","DOIUrl":"https://doi.org/10.24295/CPSSTPEA.2024.00016","url":null,"abstract":"Partial shading (PS) presents a significant concern in PV arrays due to its substantial impact on system performance, causing reduced power output, distorted PV characteristics, and power loss. Therefore, this paper introduces a novel accelerated linear convergence factor-based spotted hyena optimization for dynamic PV array reconfiguration (DPVAR). The key aim of the accelerated linear convergence factor is to reduce row difference in each tier while minimizing the need to relocate modules, within a significantly reduced iteration count. The algorithm pursues two primary objectives: enhancing power generation under PS and efficiently finding the global maximum power within a minimum period while minimizing steady-state oscillations. Furthermore, the proposed algorithm is adaptable to dynamic PS conditions and applicable for symmetric and asymmetric PV arrays of any size. The effectiveness of the technique is evaluated through simulation and experiments. In addition, the performance of the proposed technique is compared to the particle swarm optimization (PSO) based reconfiguration method. The investigation reveals that the proposed reconfiguration technique demonstrates an average power enhancement of 17.57% compared to the before-reconfiguration method and 7.88% compared to the PSO reconfiguration method.","PeriodicalId":100339,"journal":{"name":"CPSS Transactions on Power Electronics and Applications","volume":"9 3","pages":"253-262"},"PeriodicalIF":0.0,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10661284","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142376683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Adaptive Virtual Impedance-Based Fault Current Limiting Strategy for Grid-Forming Inverters 基于虚拟阻抗的自适应并网逆变器故障电流限制策略

CPSS Transactions on Power Electronics and Applications Pub Date : 2024-08-30 DOI: 10.24295/CPSSTPEA.2024.00015

Fengshun Jiao;Jie Zhang;Xinming Jiang;Xinyue Li;Yunyan Yang;Tao Xie

{"title":"Adaptive Virtual Impedance-Based Fault Current Limiting Strategy for Grid-Forming Inverters","authors":"Fengshun Jiao;Jie Zhang;Xinming Jiang;Xinyue Li;Yunyan Yang;Tao Xie","doi":"10.24295/CPSSTPEA.2024.00015","DOIUrl":"https://doi.org/10.24295/CPSSTPEA.2024.00015","url":null,"abstract":"Grid-forming inverters (GFIs), which can mimic the behaviors of conventional synchronous generators to provide the frequency and voltage support for the electricity grids, face the challenge of overcurrent during grid faults due to the voltage-source output characteristics. The power semiconductors of inverters are incapable to withstand fault current and easily destroyed. To tackle the overcurrent dilemma encountered by GFIs during voltage drops, this paper proposes an adaptive virtual impedance-based fault current limiting strategy. This adaptive strategy can adjust dynamically the virtual impedance value in real-time based on the magnitude of fault currents, and thereby suppress fault currents effectively. To analyze the impacts of the adaptive impedance on the stability of GFIs, an impedance model composed of the adaptive impedance, grid and voltage control loops, is established in the dq reference frame. The influence of the adaptive virtual impedance control parameters on the stability of the grid-forming inverter system is evaluated through the generalized Nyquist criterion. The efficacy of the proposed adaptive virtual impedance strategy in fault current limitation and the accuracy of the stability analysis are validated through the comprehensive simulation results carried out in Matlab/Simulink and OPAL-RT semi-physical platform.","PeriodicalId":100339,"journal":{"name":"CPSS Transactions on Power Electronics and Applications","volume":"9 3","pages":"325-335"},"PeriodicalIF":0.0,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10661285","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142376878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An Improved Non-Isolated Resonant Converter With Integrated Magnetics for Data Center Applications 适用于数据中心应用的改进型集成磁性元件非隔离谐振转换器

CPSS Transactions on Power Electronics and Applications Pub Date : 2024-08-30 DOI: 10.24295/CPSSTPEA.2024.00014

Zewei Li;Yuanchi Zhang;Yu Zhang;Yujie Cheng;Yan Xing;Hongfei Wu

{"title":"An Improved Non-Isolated Resonant Converter With Integrated Magnetics for Data Center Applications","authors":"Zewei Li;Yuanchi Zhang;Yu Zhang;Yujie Cheng;Yan Xing;Hongfei Wu","doi":"10.24295/CPSSTPEA.2024.00014","DOIUrl":"https://doi.org/10.24295/CPSSTPEA.2024.00014","url":null,"abstract":"An improved non-isolated resonant converter with integrated magnetics is proposed to achieve high step-down voltage conversion ratio for 48 V data center applications. The non-isolated resonant converter is composed of autotransformer cell and LLC resonant cell. The outputs of the two cells are in parallel to achieve higher output current. By adopting a symmetrical half-bridge circuit structure, the risk of DC bias in high-frequency transformers is addressed, and balanced current stress on synchronous rectifier switches is achieved. Magnetic integration of the autotransformer and high frequency transformer is proposed to achieve higher power density and higher efficiency. Topology, operation principle, integrated magnetic design and implementation of the proposed non-isolated resonant converter are analyzed in detail. Experimental prototype with 8:1 conversion ratio is developed for the front-end bus converter of 48 V data-center power systems. The power density of the prototype is 1.734 kW/in\u0000<sup>3</sup>\u0000, and the maximum efficiency is 98.2%.","PeriodicalId":100339,"journal":{"name":"CPSS Transactions on Power Electronics and Applications","volume":"9 3","pages":"336-344"},"PeriodicalIF":0.0,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10661286","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142376619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Measurement Method of High-Frequency Winding Loss in Gapped Inductors Based on Magnetic Field Equivalence 基于磁场等效的间隙电感高频绕组损耗测量方法

CPSS Transactions on Power Electronics and Applications Pub Date : 2024-08-30 DOI: 10.24295/CPSSTPEA.2024.00019

Zhiyong Qiu;Kaining Fu;Wei Chen

{"title":"Measurement Method of High-Frequency Winding Loss in Gapped Inductors Based on Magnetic Field Equivalence","authors":"Zhiyong Qiu;Kaining Fu;Wei Chen","doi":"10.24295/CPSSTPEA.2024.00019","DOIUrl":"https://doi.org/10.24295/CPSSTPEA.2024.00019","url":null,"abstract":"High-permeability cores, such as ferrite, can increase power transfer efficiency and are often designed to be gapped to mitigate magnetic saturation. The fringing effect caused by the air-gap increases the winding loss of the gapped inductor. The key to accurately evaluating its winding loss is extracting that from the total loss. This paper introduces a method for measuring the winding loss of gapped inductors based on magnetic field equivalence. The gapless inductor with the winding for equivalent air-gap was constructed to characterize the magnetic field within the core window of the gapped inductor, and the auxiliary winding was used to replace the winding of the gapped inductor to generate the equivalent magnetizing magnetomotive force. Based on the transformer winding short-circuit method with the small-signal impedance test, the winding loss was separated from the core loss. After the resistance of auxiliary winding was measured by using an air-core inductor, the winding loss of the gapped inductor was consequently obtained. The proposed scheme was applied to inductors made of different sizes and structures, and the measured errors were within 20% in the range of 100 kHz to 1 MHz. The winding loss had a steeper growth tendency in this range than the lower frequency, so the proposed method is effective at high switching frequencies especially.","PeriodicalId":100339,"journal":{"name":"CPSS Transactions on Power Electronics and Applications","volume":"9 4","pages":"395-404"},"PeriodicalIF":0.0,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10661292","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142938169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Open-Circuit Fault Diagnosis for the Grid-Tied T-Type Inverter Based Only on Three-Phase Currents 仅基于三相电流的并网 T 型逆变器开路故障诊断

CPSS Transactions on Power Electronics and Applications Pub Date : 2024-07-16 DOI: 10.24295/CPSSTPEA.2024.00012

Zhixi Wu;Jin Zhao

引用次数: 0

Twelve-Step Voltage Source Inverter: A Three-Phase Six-Levels Inverter Using Planar Transformers 十二阶电压源变频器：使用平面变压器的三相六电平变频器

CPSS Transactions on Power Electronics and Applications Pub Date : 2024-07-16 DOI: 10.24295/CPSSTPEA.2024.00011

Haitham Kanakri;Euzeli Cipriano Dos Santos;Maher Rizkalla

{"title":"Twelve-Step Voltage Source Inverter: A Three-Phase Six-Levels Inverter Using Planar Transformers","authors":"Haitham Kanakri;Euzeli Cipriano Dos Santos;Maher Rizkalla","doi":"10.24295/CPSSTPEA.2024.00011","DOIUrl":"https://doi.org/10.24295/CPSSTPEA.2024.00011","url":null,"abstract":"Multi-level inverters (MLIs) are becoming increasingly popular in high-speed motor drive systems for modern electric aircraft applications. However, two significant limitations are associated with current MLIs technology: (1) the high switching losses due to the high carrier switching frequency and (2) the complex modulation schemes required to maximize the DC source utilization. Consequently, the development of new topologies to mitigate these limitations is imperative for the rapid advancement of future electric aircraft systems. This paper introduces a six-level twelve-step inverter (TSI) that utilizes twelve switches and three planar high-frequency transformers. Implementing the proposed configuration ensures maximum DC source utilization, with a peak phase voltage of \u0000<tex>$5V_{text{dc}}/3$</tex>\u0000. The proposed solution presents less semiconductor losses than the conventional MLIs, surpassing conventional MLIs, associated with neutral point clamped (NPC), flying capacitor (FC), and cascaded H-bridge (CHB). Experimental results demonstrate the TSI's operation under static and dynamic conditions and its capability to function in three different modes: three-step, six-step, and twelve-step operations. The paper also offers a comprehensive design of the proposed planar transformer, supported by theoretical analysis, finite element analysis (FEA), and experimental validation.","PeriodicalId":100339,"journal":{"name":"CPSS Transactions on Power Electronics and Applications","volume":"9 3","pages":"263-273"},"PeriodicalIF":0.0,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10600091","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142376684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Linear Extended State Observer-Based Distributed Secondary Control of DC Microgrids Under False Data Injection Attacks 虚假数据注入攻击下基于线性扩展状态观测器的直流微电网分布式二级控制

CPSS Transactions on Power Electronics and Applications Pub Date : 2024-07-16 DOI: 10.24295/CPSSTPEA.2024.00013

Yiwei Feng;Shuangshuang Wang

引用次数: 0

A Constant Common Mode Voltage Single-Phase Five-Level Transformerless PV Inverter Considering the Effect of Switch Device Junction Capacitance 考虑开关器件结电容影响的恒定共模电压单相五级无变压器光伏逆变器

CPSS Transactions on Power Electronics and Applications Pub Date : 2024-06-11 DOI: 10.24295/CPSSTPEA.2024.00010

Mln Vital;Venu Sonti;Yam P. Siwakoti;Sze Sing Lee;Sachin Jain

{"title":"A Constant Common Mode Voltage Single-Phase Five-Level Transformerless PV Inverter Considering the Effect of Switch Device Junction Capacitance","authors":"Mln Vital;Venu Sonti;Yam P. Siwakoti;Sze Sing Lee;Sachin Jain","doi":"10.24295/CPSSTPEA.2024.00010","DOIUrl":"https://doi.org/10.24295/CPSSTPEA.2024.00010","url":null,"abstract":"Constant common mode voltage (CCMV) is critical in Solar Photovoltaic (SPV) systems. Maintaining CCMV further eliminates the voltage transitions across the parasitic capacitance of the PV panel, making it a low-frequency output voltage wave-form. This further reduces the CMC and leakage current in the SPV systems. This paper presents a CCMV switched capacitor PV inverter configuration that maintains a low-frequency terminal voltage while considering the effect of switch device junction capacitance (SDJC). Thus, the proposed configuration eliminates the transitions in the common mode and terminal voltage due to the SDJC. The two switched capacitors employed in the proposed configuration are charged and discharged within each switching period, supporting the self-charge balance feature apart from low voltage and RMS current rating, reducing its size and value. Further, the proposed system effectively utilizes the PV source as switch capacitors and the DC-bus buffer capacitor across the PV source comes in parallel in each switching period. The proposed configuration can also operate at lower modulation indices, generating three levels with CCMV. A new mathematical analysis considering SDJC is given for the derivation of expression for CMV and terminal voltage, which is further verified using simulation and experimental results.","PeriodicalId":100339,"journal":{"name":"CPSS Transactions on Power Electronics and Applications","volume":"9 3","pages":"313-324"},"PeriodicalIF":0.0,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10554797","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142376620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Novel Model Predictive Current Control With Reduced Computational Burden Based on Discrete Space Vector Modulation for PMSM Drives 基于离散空间矢量调制的新型模型预测电流控制，可减轻 PMSM 驱动器的计算负担

CPSS Transactions on Power Electronics and Applications Pub Date : 2024-06-11 DOI: 10.24295/CPSSTPEA.2024.00009

Jun Sun;Yong Yang;Jiefeng Hu;Xinan Zhang;Xinghe Li;Jose Rodriguez

{"title":"A Novel Model Predictive Current Control With Reduced Computational Burden Based on Discrete Space Vector Modulation for PMSM Drives","authors":"Jun Sun;Yong Yang;Jiefeng Hu;Xinan Zhang;Xinghe Li;Jose Rodriguez","doi":"10.24295/CPSSTPEA.2024.00009","DOIUrl":"https://doi.org/10.24295/CPSSTPEA.2024.00009","url":null,"abstract":"Discrete space vector modulation (DSVM) technique is commonly adopted in model predictive control (MPC) to mitigate current harmonics and torque ripples. Nevertheless, the employment of DSVM typically leads to heavy computational burden and high switching frequency (SF). To solve these problems, a novel model predictive current control (MPCC) scheme based on DSVM is proposed in this paper for permanent magnet synchronous motor (PMSM) drives. Firstly, a simple voltage vectors (VVs) pre-selection strategy based on the stator flux increment is introduced to eliminate the redundant virtual VVs generated by DSVM for the purpose of lower computational burden. Then, a hierarchical search strategy is designed to generate the candidate VVs online, which can further simplify the DSVM technique. In addition, an efficient optimal switching sequence (OSS) method is also employed to reduce the switching losses without weakening the control performance. Compared to the existing strategies, the proposed scheme possesses lower complexity and SF as well as superior performance. The effectiveness of the proposed scheme is supported by comparative experimental results on a PMSM platform.","PeriodicalId":100339,"journal":{"name":"CPSS Transactions on Power Electronics and Applications","volume":"9 3","pages":"292-303"},"PeriodicalIF":0.0,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10554795","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142376685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Data-Driven Parameter Inversion for DC Fault Current Analytical Solution of Modular Multilevel Converter-Based High Voltage DC Grid 基于模块化多电平转换器的高压直流电网直流故障电流分析解决方案的数据驱动参数反演

CPSS Transactions on Power Electronics and Applications Pub Date : 2024-06-11 DOI: 10.24295/CPSSTPEA.2024.00008

Meiqin Mao;Xun Jiang;Kaifan Hu;Liuchen Chang

{"title":"Data-Driven Parameter Inversion for DC Fault Current Analytical Solution of Modular Multilevel Converter-Based High Voltage DC Grid","authors":"Meiqin Mao;Xun Jiang;Kaifan Hu;Liuchen Chang","doi":"10.24295/CPSSTPEA.2024.00008","DOIUrl":"https://doi.org/10.24295/CPSSTPEA.2024.00008","url":null,"abstract":"In a multi-terminal modular multilevel converter-based high voltage direct current (MMC-HVDC) grid, due to the coupling between converter stations, it is difficult to obtain an accurate analytical solution on the DC fault current through the traditional equivalent resistance-inductance-capacitance circuit model (E-RLCM). In this paper, a data-driven parameter inversion method is proposed to derive the accurate equivalent parameters in the E-RLCM by combining the electromagnetic transient simulation data with the backpropagation neural network, and the polynomial regression. In this way, the accurate analytic calculation expression of the DC fault current for a multi-terminal MMC-HVDC grid with a pole-to-pole fault (PTPF) is obtained. To verify the effectiveness of the proposed method, simulations are performed for a four-terminal MMC-HVDC grid with a PTPF by PSCAD. The results show that the average calculation error of the DC fault current using the inversion parameters is significantly reduced from over 10% to 2.84%.","PeriodicalId":100339,"journal":{"name":"CPSS Transactions on Power Electronics and Applications","volume":"9 3","pages":"274-282"},"PeriodicalIF":0.0,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10554806","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142376879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0