International Journal of Circuit Theory and Applications最新文献_第7页

Macroscopic state-based reactive voltage control of virtual synchronous generator in AC microgrid 交流微电网中基于宏观状态的虚拟同步发电机无功电压控制

IF 1.8 3区工程技术

International Journal of Circuit Theory and Applications Pub Date : 2024-08-07 DOI: 10.1002/cta.4197

Fangyuan Li, Yan Liu, Yanhong Liu

{"title":"Macroscopic state-based reactive voltage control of virtual synchronous generator in AC microgrid","authors":"Fangyuan Li, Yan Liu, Yanhong Liu","doi":"10.1002/cta.4197","DOIUrl":"10.1002/cta.4197","url":null,"abstract":"In building a smarter and more flexible low-carbon smart grid system, alternating current (AC) microgrids using virtual synchronous generator (VSG) technology are viewed as a key link in integrating distributed renewable energy access into the main grid. Given that renewable energy sources (such as solar, hydroenergy, and wind) do not have sufficient capacity for reactive power when not available, AC microgrids face challenges in maintaining stable operation. In order to overcome this difficulty, it is hoped that digging deeper and applying more system information can significantly improve the overall performance of the microgrid. This paper proposes a novel method based on macroscopic state dynamic modeling. This method expands the understanding of the inherent rational control mechanism within the microgrid, enabling the overall control objective of the microgrid to be expressed in a more abstract and direct manner. Additionally, by implementing additional convergence constraint conditions on the macroscopic state dynamics, such as based on some optimality criteria, a set of macroscopic state controllers can be obtained to meet specific performance indicators. Theoretical analysis combined with simulation validation demonstrate the effectiveness of this macroscopic state based control strategy. It proves that when meeting the predefined design requirements, the designed controller can enhance the transient response of microgrids in practical applications, thus supporting higher rate of renewable energy access and promoting the development of the smart grid.","PeriodicalId":13874,"journal":{"name":"International Journal of Circuit Theory and Applications","volume":"53 4","pages":"2214-2226"},"PeriodicalIF":1.8,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141969067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Double‐order negative group delay filtering function: A brilliant capability of the bilinear double‐order transfer function 双阶负群延迟滤波函数双线性双阶传递函数的卓越能力

IF 2.3 3区工程技术

International Journal of Circuit Theory and Applications Pub Date : 2024-08-07 DOI: 10.1002/cta.4213

Rawid Banchuin

{"title":"Double‐order negative group delay filtering function: A brilliant capability of the bilinear double‐order transfer function","authors":"Rawid Banchuin","doi":"10.1002/cta.4213","DOIUrl":"https://doi.org/10.1002/cta.4213","url":null,"abstract":"In this work, the capability to generate the negative group delay (NGD) phenomenon at those frequencies higher than a certain value, that is, the NGD high‐pass (HP) filtering function, of the bilinear double‐order transfer function has been demonstrated. Based on the Type‐I bilinear double‐order filter circuit, our theory has been verified by strong agreements between the formulae and their proof‐of‐concept (POC) circuit‐based simulation results. Both formula‐based and POC circuit‐based simulations give the minimum group delay of −5 ms yet the cut‐off frequency of 10 and 9 rad/s, respectively. Such slight deviation is caused by the approximation error of the bilinear double‐order impedance. By employing two orders, the bilinear double‐order transfer function has been found to be the basis transfer function for the NGD filtering function with the highest degree of freedom. Based on our design equation for the NGD filtering function, it can be seen that the distances between zero and pole and the characteristic frequency of the bilinear double‐order transfer function are governed by such characteristic frequency itself, the cut‐off frequency of the NGD filtering function, and the fractional order of the Laplacian operator. In addition, the effects of the fractional order of the Laplacian operator, the fractional order of the transfer function, and the ratio of the abovementioned distances to the characteristics of the newly found double‐order NGD filtering function have been studied in detail.","PeriodicalId":13874,"journal":{"name":"International Journal of Circuit Theory and Applications","volume":"59 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141941932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis and design of a three-coil IPT system with independent dual output ports 分析和设计具有独立双输出端口的三线圈 IPT 系统

IF 1.8 3区工程技术

International Journal of Circuit Theory and Applications Pub Date : 2024-08-07 DOI: 10.1002/cta.4224

Xuebin Zhou, Kangshuai Dong, Jiabin Wang, Lin Yang

{"title":"Analysis and design of a three-coil IPT system with independent dual output ports","authors":"Xuebin Zhou, Kangshuai Dong, Jiabin Wang, Lin Yang","doi":"10.1002/cta.4224","DOIUrl":"10.1002/cta.4224","url":null,"abstract":"Industrial applications tend to involve a substantial assemblage of electronic devices, and it is imperative to consider diverse charging requirements while charging these devices. This paper proposes a three-coil single-input-and-dual-output (SIDO) inductive power transfer (IPT) system to meet the charging requirements of different devices. The system includes two independent output ports, providing constant voltage (CV) output and constant current (CC) output for different loads, respectively. In addition, the zero-phase angle (ZPA) operation can be achieved, thus avoiding injection of reactive power and improving energy transfer efficiency. Unlike previous related studies, the receiver of the proposed SIDO IPT system only includes one receiving coil to pick up energy, eliminating unnecessary cross-coupling and complex decoupling circuits in traditional IPT systems with multiple outputs. This study first analyzes the CC/CV output theory of the proposed SIDO IPT system in detail, and designs and optimizes the parameters by establishing an equivalent model. Then, the conditions for achieving zero-voltage switching (ZVS) operation of the inverter are obtained by analyzing the sensitivity of CC/CV performance to the variation of the compensation capacitors. Finally, a verification experimental prototype with 2.5A CC output and 72 V CV output is established to verify the effectiveness of the proposed IPT system.","PeriodicalId":13874,"journal":{"name":"International Journal of Circuit Theory and Applications","volume":"53 4","pages":"1879-1891"},"PeriodicalIF":1.8,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141941928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparative analysis of control strategies impact on power losses in IGBT power modules with a multiphysics-circuit coupling method 利用多物理场-电路耦合方法比较分析控制策略对 IGBT 功率模块功率损耗的影响

IF 1.8 3区工程技术

International Journal of Circuit Theory and Applications Pub Date : 2024-08-07 DOI: 10.1002/cta.4219

Zhifeng Dou, Changai Zhang, Ye Tian, Falong Lu, Qian Wang

{"title":"Comparative analysis of control strategies impact on power losses in IGBT power modules with a multiphysics-circuit coupling method","authors":"Zhifeng Dou, Changai Zhang, Ye Tian, Falong Lu, Qian Wang","doi":"10.1002/cta.4219","DOIUrl":"10.1002/cta.4219","url":null,"abstract":"Power losses in semiconductor devices present a significant impediment to advancing power electronics systems for achieving higher frequencies, improved efficiency, and greater integration. A major challenge lies in directly coupling power losses with various control strategies, considering the variations in manufacturers, packaging, and process structures within the power electronics field. This paper introduces a field-circuit coupling simulation methodology of the insulated gate bipolar transistor (IGBT) within the Simulink/COMSOL environment, using a conventional three-phase six-switch voltage source inverter (VSI) IGBT module as a case study. A composite transfer function interconnects the electrical and thermal aspects, enabling bidirectional coupling between IGBT temperature and losses. This study aims to comprehensively compare the effects of various control strategies, namely, single-vector, dual-vector, and three-vector current model predictive control (CMPC) and space vector pulse width modulation (SVPWM), on the losses and temperature of IGBT power modules. The findings emphasize that losses are significantly influenced by the selection of weighting factor coefficients and power factor settings under the same CMPC control strategy with a fixed switching frequency. Additionally, the selection of control strategies, such as CMPC and SVPWM, substantially impacts power losses in power electronic devices.","PeriodicalId":13874,"journal":{"name":"International Journal of Circuit Theory and Applications","volume":"53 4","pages":"2089-2108"},"PeriodicalIF":1.8,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141941930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Single-stage single-phase multiport DC–AC inverter suitable for standalone applications due to its notable performance in different operation modes 单级单相多端口直流-交流逆变器在不同运行模式下性能卓越，适合独立应用

IF 1.8 3区工程技术

International Journal of Circuit Theory and Applications Pub Date : 2024-08-06 DOI: 10.1002/cta.4201

Sina Ahmadian, Vahid Abbasi, Siroos Hemmati

{"title":"Single-stage single-phase multiport DC–AC inverter suitable for standalone applications due to its notable performance in different operation modes","authors":"Sina Ahmadian, Vahid Abbasi, Siroos Hemmati","doi":"10.1002/cta.4201","DOIUrl":"10.1002/cta.4201","url":null,"abstract":"A new multiport DC–AC converter is proposed for standalone and off-grid tied applications. The configuration converts power from DC to AC form in a single stage with suitable voltage gain. To increase the certainty of supporting power, the converter is designed to operate in four modes, including battery-alone mode. The other advantage of the presented work is supplying the output power during unbalanced voltage conditions of the input ports. The advanced features of the converter for being used in standalone applications are related to the suitable placement and structure of the bidirectional port. In addition, the configuration is designed in a way to contain appropriate structural properties such as the existence of a common ground between the DC section and inverter, continuity of input currents, configured by an acceptable number of components, and low-voltage stress on the DC–DC section's switches. Furthermore, it has an impedance network to protect the inverter's switches in a shoot-through state. To confirm the converter advantages from the mentioned points of view, it has been compared with similar configurations. A prototype rated at 110 V is prepared to demonstrate the advantages of the converter performance per different conditions. The results of the steady-state and transient experiments validate the suitability of the presented converter.","PeriodicalId":13874,"journal":{"name":"International Journal of Circuit Theory and Applications","volume":"53 4","pages":"2275-2291"},"PeriodicalIF":1.8,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141969196","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-selectivity wideband four-way filtering power divider with input absorptive feature 带输入吸收功能的高选择性宽带四路滤波功率分压器

IF 1.8 3区工程技术

International Journal of Circuit Theory and Applications Pub Date : 2024-08-06 DOI: 10.1002/cta.4227

Siran Zhang, Hongmei Liu, Zhongbao Wang, Shaojun Fang

引用次数: 0

Low-latency and power-efficient row-based binary-weighted compensator for fixed-width Booth multiplier 用于固定宽度布斯乘法器的低延迟、高功效、基于行的二进制加权补偿器

IF 1.8 3区工程技术

International Journal of Circuit Theory and Applications Pub Date : 2024-08-06 DOI: 10.1002/cta.4207

Chung-Yi Li, Hong-Chi Hu, Yuan-Ho Chen, Shinn-Yn Lin

引用次数: 0

Enhancing damping of low-frequency oscillations in power networks through energy storage system-based controller 通过基于储能系统的控制器增强对电网低频振荡的抑制作用

IF 1.8 3区工程技术

International Journal of Circuit Theory and Applications Pub Date : 2024-08-04 DOI: 10.1002/cta.4196

Rohit Kumar, Soumya R. Mohanty, Mitresh Kumar Verma

{"title":"Enhancing damping of low-frequency oscillations in power networks through energy storage system-based controller","authors":"Rohit Kumar, Soumya R. Mohanty, Mitresh Kumar Verma","doi":"10.1002/cta.4196","DOIUrl":"10.1002/cta.4196","url":null,"abstract":"<div>\u0000 \u0000 Mitigating inter-area low-frequency oscillations is a significant concern in multi-machine power systems due to their adverse effects on system stability. These oscillations are intricately linked with power oscillations. So appropriate power modulation through the Battery Energy Storage System (BESS) can be an effective strategy for preserving system stability. In this paper, the maximal of all minimal residue indices under variations in power system operating conditions is utilized as the index for identifying the location for installation of the BESS, the damping control loop, and the feedback signal. A fixed-structure \u0000<math>\u0000 <msub>\u0000 <mi>H</mi>\u0000 <mi>∞</mi>\u0000 </msub></math> scheme-based wide-area damping controller (WADC) is proposed for the BESS, providing sufficient damping of inter-area oscillation modes. A modified IEEE 39-bus system is simulated using a real-time digital simulator as a test system in this work. The simulation results confirmed that the proposed WADC could effectively damp various inter-area oscillation modes. Furthermore, it offers robust damping performance over contingencies associated with the system's various operating scenarios as well as the uncertainty associated with fixed and variable communication delays in the feedback signal of WADC and the integration of solar photovoltaic systems. Moreover, a comparative analysis of the proposed WADC is carried out with a BESS-based wide-area power system stabilizer, which is found to be more effective in mitigating system inter-area oscillations.\u0000 </div>","PeriodicalId":13874,"journal":{"name":"International Journal of Circuit Theory and Applications","volume":"53 4","pages":"2292-2317"},"PeriodicalIF":1.8,"publicationDate":"2024-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141941934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of a new modular-isolated-forward-based active snubber cell for power switches 为功率开关设计新型模块化隔离前向有源缓冲单元

IF 1.8 3区工程技术

International Journal of Circuit Theory and Applications Pub Date : 2024-08-04 DOI: 10.1002/cta.4205

Haci Bodur, Abdulkerim Gundogan, Ahmet Faruk Bakan

{"title":"Design of a new modular-isolated-forward-based active snubber cell for power switches","authors":"Haci Bodur, Abdulkerim Gundogan, Ahmet Faruk Bakan","doi":"10.1002/cta.4205","DOIUrl":"10.1002/cta.4205","url":null,"abstract":"In this paper, a new modular-isolated-forward-based active snubber cell (SC) for power switches is designed. In the proposed new SC, the zero voltage transition (ZVT) technique is implemented with a forward converter although the current counterparts generally use a flyback converter. In the converter with the new SC, the main switch is turned on with ZVT (full zero voltage switching [ZVS]) and turned off with ZVS, the main diode is turned off with zero current switching (ZCS), the auxiliary switch is turned on with ZCS and turned off with ZVS, and the parasitic capacitor energies are recovered. In addition, thanks to the forward converter, it has been possible to minimize the transformer leakage inductance and greatly reduce the current values of devices in the new SC. The new cell is applied to a single-phase, grid-connected, T-type three-level inverter (T2-3LI) as an example. A detailed steady-state analysis of this inverter was made, and the theoretical analysis was confirmed with measurement results taken from a prototype with 100 kHz and 3.3 kW values. Compared to its hard switching (HS) equivalent, in the converter with soft switching (SS) cell, the total circuit loss was reduced from about 248 W to 86 W, thus achieving an increase in the total efficiency from 92.5% to 97.4%.","PeriodicalId":13874,"journal":{"name":"International Journal of Circuit Theory and Applications","volume":"53 4","pages":"2043-2058"},"PeriodicalIF":1.8,"publicationDate":"2024-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141941931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A distributed coordinated control strategy for isolated AC microgrids based on consensus algorithm considering communication delay 基于考虑通信延迟的共识算法的隔离交流微电网分布式协调控制策略

IF 1.8 3区工程技术

International Journal of Circuit Theory and Applications Pub Date : 2024-08-04 DOI: 10.1002/cta.4210

Chaofeng Yan, Qirui Li, Xiaomeng Zhang, Yang Han, Ping Yang, Amr S. Zalhaf

{"title":"A distributed coordinated control strategy for isolated AC microgrids based on consensus algorithm considering communication delay","authors":"Chaofeng Yan, Qirui Li, Xiaomeng Zhang, Yang Han, Ping Yang, Amr S. Zalhaf","doi":"10.1002/cta.4210","DOIUrl":"10.1002/cta.4210","url":null,"abstract":"In the multi-paralleled converter microgrid system, the traditional hierarchical control strategy can eliminate the bus voltage amplitude and frequency deviation from the rated value. However, isolated AC microgrids may face extreme scenarios such as communication delays and interruptions in data transmission due to the use of low-bandwidth communication (LBC) lines. Additionally, the inconsistent line impedance of each distributed generation (DG) unit may result in the inaccurate division of reactive power in multi-paralleled converter systems, thus affecting system stability. To address these issues, this paper presents a distributed coordinated control strategy for isolated AC microgrids based on the consensus algorithm. The proposed strategy first replaces LBC lines with a filter to alleviate the effects of communication delays. A small-signal model is established in its state space, and stability of the microgrid system under the proposed control strategy is verified through eigenvalue analysis. Furthermore, based on the above theoretical analysis, a consensus algorithm is introduced, and a distributed control strategy for isolated AC microgrids based on the consensus algorithm is proposed to solve the issue of inaccurate equalization of the system's reactive power. Finally, factors that influence the dynamic convergence performance of the consensus algorithm are analyzed through simulation in PLECS software. Also, the maximum tolerable communication delays of the microgrid system under different communication topologies are also compared, and the system's robustness is evaluated under the condition of sudden communication interruption in a DG unit and sudden weather variation. These analyses confirmed the robustness of the proposed strategy against communication delays, output power fluctuation, and communication interruptions.","PeriodicalId":13874,"journal":{"name":"International Journal of Circuit Theory and Applications","volume":"53 4","pages":"2318-2339"},"PeriodicalIF":1.8,"publicationDate":"2024-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141941933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0